SOP Analyzer User`s Manual
Contents
1. 6 64 The PS is requesting services An enabled event in the Standard i FoB Event stallis Event Status Register is set TRUE 4 16 MAV Massage Available Output queue is not empty 3 8 User Definable Not Used always 0 2 4 User Definable Not Used always 0 1 2 User Definable Not Used always 0 0 1 User Definable Not Used always 0 Service request and Serial poll When the RQS bit in the SRER is set the SOP Analyzer asserts the SRQ line Then the controller polls each addressed listener to send back a status byte of the SBR that indicates whether it has asserted the SRQ line and needs servicing Serial Poll After the controller reads the Status Byte through serial poll the RQS bit is cleared automatically To use this capability appropriately you should configure your controller to respond to the service request 33 34 pscnero EST User s Manual 4 Command Set 4 1 Operation Related Commands 4 1 1 Measurement Related Commands MEAS Description Start or stop the measurement Syntax Parameter Example MEAS MEAS 011 0 for the measurement stop 1 for the measurement start MEAS 1 Description Query the current measurement state Syntax Response Example STOKES The returned message is 0 or 1 in NR1 format MEAS Oor1 MEAS gt 1 Description Query the Stokes vector and DOP The response message is in NR3 format2. 100 120 220 240 VAC 50 60 Hz FUSE T2AL 250VAC POWER 80 VA Max RS 232 A I w N m i ts GPIB o WARNING rue nahchmertieenmentllenssrskogemi o Fig 5 Rear Panel of SA2000 Power entry module The power entry module for the AC line voltage input It blocks high frequency noise entering the instrument Before you plug the power cord into a socket outlet check the voltage selector switch to determine if it is in the correct position Voltage selector switch This switch is used to select an input AC voltage Set at 115 V for operations between 100 and 125 VAC Set at 230 V for operations between 210 and 250 VAC Fuse holder RS 232 connector RS 232 interface is provided GPIB connector GPIB interface is provided BNC connectors The instrument outputs analog voltage that is proportional to one of the measurement results CAUTION To minimize the electromagnetic interference EMI make sure that your cable for remote control RS 232 or GPIB is a shielded cable Using not shielded cable may increase the interference by electromagnetic radiation noise 19 l 3 1 1e SOP Analyzer 20 User s Manual 3 3 How to Use SOP Analyzer 3 3 0 Before the Start The SHIFT key annunciator When the SHIFT key is pressed its annunciator A is turned on at the most upper right side of the measurement display window If it is
3. Syntax STOKES Response lt POWER in mW gt lt S1 gt lt S2 gt lt S3 gt lt DOP in gt Example STOKES gt 1 23e 6 1 21e 1 6 00e 2 3 34e 1 9 53e 1 EXRATIO Description Query the extinction ratio and major axis angle Syntax Response Example The response message is in NR3 format EXRATIO lt LPER in dB gt lt ANGLE in Deg gt lt PERref in dB gt EXRATIO gt 3 35e 1 4 56e 1 4 34e 1 Il Command Set MINMAX Description Clear the stored minimum and maximum readings and restart the min max operation Syntax MINMAX Parameter None Example MINMAX MINMAX Description Query the current minimum and maximum readings The response message is in NR3 format Syntax MINMAX Response lt minLPER in dB gt lt minPERref in dB gt lt minANGLE in Deg gt lt maxANGLE in Deg gt Example MINMAX gt 1 35e 1 1 56e 1 8 34e 1 4 56e 1 4 1 2 Measurement Configuration Related Commands SREF Description Set the user reference angle The reference mode is changed to the user reference mode automatically after executing this command Syntax SREF angle Parameter angle the user reference angle in degrees If there is not any parameter after command header the current major axis angle is set as the user reference angle Example SREF 34 50r SREF SREF Description Query the current user reference angle The returned message is in
4. 13114321 1e SOP Analyzer D 46 User s Manual Phase retardation 2q is the only function of the operating wavelength In fixed A mode SA2000 assumes that the wavelength of optical light does not change and so does the phase retardation 2 SA2000 also keeps the value of 2q calculated at the moment when fixed mode is initiated and applies this value throughout the whole measurement during fixed A mode operation without new calculations of 2a If the user does not need to change the wavelength of optical source for a long time FIBERPRO recommends using fixed A mode The merit of fixed A mode is the stability of DOP and S3 near the North and South Pole of Poincare Sphere that is circular polarization states It is important to initiate fixed A mode when the state of polarization is near linear polarization state to get the most accurate 2a value To use fixed A mode appropriately using the following procedure 1 Put SA2000 in normal operation mode non fixed A mode 2 Monitor S3 value of SA2000 3 Apply linearly polarized light that is when S3 is nearly zero 4 Keeping stable polarization state press fixed A key to enter activate A operation mode 5 4 Changing Adaptor FIBERPRO supplies SA2000 with two kinds of adaptors R reduced type and N wide type The keyway width of R type is 2 03 2 08 mm and that of N type is 2 15 2 20 mm Each adaptor is marked with R or N characters on the front Choosing the appropria
5. ANUM 2 Description Query the current average number The returned message is a decimal value in NR1 format Syntax Response Example ANUM 1 2 4 8 16 or 32 ANUM gt 2 4 1 3 Analog Output Related Commands AOUT Description Set the analog voltage output mode AOUT 01121314 Parameter analog voltage output mode number Syntax mode Channel 1 Channel 2 Channel 3 0 all off 1 2 3 4 5 S1 LPER LPER PERref DOP S2 ANGLE ANGLE ANGLE ANGLE S3 PERref Power Power S3 37 38 Isl 3 1 je SOP Analyzer N User s Manual The relationship between measurement value and output voltage Measurement value Output voltage S1 S2 S3 1 1 5 00 V 5 00 V LPER 0 60 dB 0 00 V 6 00 V PERref 60 dB 60 dB 6 00 V 6 00 V Angle 90 Deg 90 Deg 9 00 V 9 00 V Power 50 dBm 10 dBm 5 00 V 1 00 V DOP 0 100 OV 5V Example AOUT 1 AOUT Description Query the current analog voltage output mode Syntax Response Example The returned message is a decimal value in NR1 format AOUT 1 2 30r4 AOUT gt 1 4 1 4 System Related Commands ERROR Description Query the oldest error in the error queue Syntax Response Example ERROR lt Error number gt lt Error description gt ERROR gt 103 Undefined header All Command Set
6. GPIB File Management e File Saving for 10 000 Points e File Loading Display Poincare Sphere ER Measurement in Poincare Sphere Display Polarization Ellipse Display Graphs for Each Parameter Display All Parameters Simultaneously 1 2 System Requirements Computer Processor e Computer with a Pentium 200 megahertz MHz processor or higher Operating System e Windows 95 Windows 98 Windows Me Windows NT 4 0 or Windows 2000 Memory 64 MB of RAM Drive e CDROM drive for installation Display e Super VGA 800 x 600 or higher resolution monitor with 256 colors Peripherals e Serial Port for RS232 or GPIB 51 Q FIBERPRO Windows App User s Manual 2 Installation 1 Insert the Installation CDROM in your CDROM Drive 2 Search the file Setup exe by using the explorer 3 Double click the icon Setup exe for executing the file you can see the fig 1 4 Press the Next button in Fig 1 after reading the information AA AO ne Aa Fig 1 Welcome Message 5 In Fig 2 you should fill in three blanks which are your name your company name and the serial number If your serial number is correct the Next button will be enabled if not you will not be able to install this application If you have no serial number or the wrong number please email to fiberpro fiberpro com After filling these blanks press the Next button The serial number is on the cover of the installation
7. q F oc is sin 2a F oc s is sin a In Eq 2 1 2a is the differential phase retardation of wave plate and F F F and F are amplitude of 0 2w 4w 6w harmonics of signal detected by the photodiode respectively where w is angular velocity of rotating wave plate From the above relationship and measured F s 4 Stokes parameters s S S S and 2a are simultaneously determined by the following relationships Eq 2 2 Eq 2 3 Eq 2 2 Eq 2 3 meem s X real F F tan a F F I s oc imag F F s iF sin 2a 11 Q Q aildi SOP Analyzer D User s Manual One of the key features of SA2000 is the ability to measure state of polarization independent of operating wavelength as shown in Eq 2 2 and Eq 2 3 even though the differential phase retardation of wave plate 2a depends on wavelength However there are some drawbacks in the above method 2q calculated according to Eq 2 2 shows uncertainty as s and s approach zero simultaneously that is circularly polarized light and 2q is the most accurate value when the light is linearly polarized This is the reason why the specification of accuracy of degree of polarization in variable wavelength operation mode is limited to the polarization state with ellipticity angle within 35 35 To overcome this drawback SA2000 provide another measurement mode fixed wavelength operation mode fixed mode In fixed mode SA2000 assumes
8. you can print the main view what you see And you can change the setting of your printer by choosing the menu Print Setup from the menu File 61 Q AEGON SOP Analyzer D Windows App User s Manual 6 Graphs Choosing View Graphs menu from the menu bar you can monitor the trend of each measured parameter by a graph 6 1 Selecting Graph Parameters Maximum of 12 parameters graphs can be displayed simultaneously If you want to change the displayed parameters check corresponding parameter check boxes in the left of the window and press Apply These graphs show maximum 1 000 data points of each parameter You can minimize the X axis range with Size popup menu and you can move X axis using scroll bar which is located at the bottom of the graph window TOF tien Fig 16 SOP Graphs 62 I Graphs 6 2 Changing Y axis Range E Auto Range Y Axis Min ode Maxi Fig 17 MinMax Dialog for Graph Default Y axis range mode is auto range mode You can change the Y axis range of specific graphs by double clicking left mouse button on the desired graph With a click of the mouse you can see the dialog box as shown in Fig 17 Write wanted range values into Y Axis Min and Y Axis Max field and click OK button Then the Y Axis range will be fixed to those values If you want to return to auto range mode just check Auto Range check box and click
9. minPERref minANGLE and maxANGLE values while MinMax button does 58 5 2 Polarization Ellipse The polarization ellipse corresponding to the last SOP is displayed For right hand polarization state polarization ellipse is a red line and for left hand polarization state polarization ellipse is a blue line The reference linear polarization whose coordinate on Poincare Sphere is 1 0 0 is represented as a vertical line in the polarization ellipse Fig 12 Polarization Ellipse 5 3 Data Box Measured results corresponding to current SOP are numerically displayed in the data box You can highlight any special fields of the measured data that you need to pay attention to with a blue color For a detailed explanation of each data field refer to 2 3 What you can measure with SA2000 of the user s manual minPERref minANGLE maxANGLE 1 15 Deg Figure 13 Data Box 59 a l J 5102 0m SOP Analyzer D Windows App User s Manual 60 5 4 File Management SA2000 Application Program has function to save and load measured data In the saving function you can save a maximum of 10 000 data samplings with definite time interval To save and load the data execute the following procedure 1 Open the SOP Analyzer DATA File dialog box as shown in Fig 14 selecting the menu File Save Select the file saving location enter file name in file name field and press the sa
10. that the wavelength of optical light does not change and so the phase retardation 2a and keeps the value of 2a calculated at the moment when fixed A mode is initiated and applies this value throughout the whole measurement during fixed A mode operation without new calculation of 2a If the user does not need to change the wavelength of optical source for a long time FIBERPRO recommends using fixed A mode The merit of fixed A mode is the stability of DOP and s near north and south pole of Poincare Sphere that is circular polarization states It is important to initiate fixed A mode when the state of polarization is near linear polarization state to get an exact 2a value Fig 1 Optical Structure of SA2000 WP wave plate POL polarizer PD photodiode Il Introduction of SA2000 u 2 3 What You can Measure with SA2000 2 3 0 Reference Linear Polarization For the representation of state of polarization we need to choose one particular linear polarization as a reference polarization that is 1 0 0 polarization in Stoke vector representation or 1 0 in Jones vector representation In this manual this polarization state will be called reference linear polarization or x polarization The following measurement parameters normalized Stokes parameter S S S polarization extinction ratio to reference polarization PERref and inclination angle of polarization ellipse ANGLE depend on the selection of referen
11. 4 2 IEEE 488 2 Command Commands CLS Description Clear the 1 Standard Event Status Register SESR 2 Status Byte Register STB and 3 Error Queue Syntax Parameter Example ESE gt CLS None CLS Description Set bits in the Standard Event Status Enable Register SESER that enable the corresponding bits in the Standard Event Status Register SESR The register is cleared 1 at power on or 2 by sending a value of zero The register is NOT changed by the RST Syntax and CLS commands ESE lt value gt Parameter The value of the integer in the range of 0 through 255 Bit Definition Value 7 MSB Power On 128 6 Not used 0 5 Command Error 32 4 Execution Error 16 3 Device Dependent Error 8 2 Query Error 4 1 Not used 0 0 Operation Complete 1 Example ESE 17 39 OO O l3l 3 1J 1e SOP Analyzer D User s Manual ESE Description Query the contents of the Standard Event Status Enable Register The returned message is the total bit weights of all of the bits in NR1 format Syntax ESE Response Decimal value in the range of 0 through 255 Example ESE gt 17 ESR Description Query the contents of the Standard Event Status Register SESR The register is cleared after being read The returned message is the total bit weights of all of the bits in NR1 format Syntax ESR Response Decimal value in
12. CDROM 52 nee SENT Fig 2 User Information 6 In Fig 3 you can change the destination location The Browse button will help you search the location After changing the location press the Next button ra P oT aero Fig 3 Choose Destination Location 7 This setup program will close after copying the files If you have no serial number or the wrong number please email to fiberpro fiberpro com 53 Q alid lidon SOP Analyzer D Windows App User s Manual 3 Getting Started The SOP Analyzer Windows Application Installation process puts the SOP Analyzer Application Program in the program files fiberpro folder or user defined folder and adds Fiberpro to the Programs menu available from the Start button To start the SOP Analyzer Application Program 1 Connect your instrument SA2000 to your computer through RS232 or GPIB 2 Power on SA2000 3 Execute Start Menu Program Fiberpro SOP Analyzer 4 GPIB RS232 You can change the communication protocol by the menu SETUP RS232 GPIB as Fig 4 If you select the RS232 protocol by the menu E Setup RS232 you need to confirm the setting of the RS232 especially the port number ee whether it is COM1 or COM2 The other pried Ind Fran settings are fixed and you don t need to change Parity J them The setting parameters are like these Data Bits pi baud rate is 57 600 none parity 8 data
13. ER value written in the blank fields of Circle and whose center is the same as the circle drawn in step 4 by checking Circle check box This reference circle may be helpful in failure decisions of extinction ratio of arbitrary device 6 You can repeat this procedure from step 3 by clicking New Circle button in ER Measurement dialog box 8 Remote Controller SOP Analyzer Remote Controller window is similar to the controller panel of the real SOP Analyzer SA2000 It consists of a measurement display window 4 indicators and 8 buttons You can eliminate display windows by double clicking the rightmouse button and vice versa Each button operation is the same as that of real panel buttons except for shift start button for GPIB address setting in real panel For detailed functions of each button please refer to 3 1 Front panel at a glance and 3 3 How to use SOP Analyzer of the user s manual SOP Analyzer Ramota Controller MEAS Ret AMT ii oJ Fixed 4 J ENTER E vo Fig 19 Remote Controller 65 socne EZ Replacing Fuse Replacing Fuse When your fuse is blown out follow the replacing procedure below But you must use the right fuse for line voltage Select proper fuse 0 5A 250V 100Vac If you don t use the right fuse for the line voltage selected it will be blown Contact FIBERPRO to order the right fuse Procedure 1 Finding fuse holder The fuse holder box is on the rear p
14. If this key is pressed together with the SHIFT key the instrument enters the user reference angle setting menu 17 QO Q al l SOP Analyzer D User s Manual Fixed A 1 3 1 55 um key The wavelength operation mode toggles between fixed A and non fixed A mode whenever this key is pressed If this key is pressed together with the SHIFT key the instrument enters the 1 3 1 55 um range setting menu SHIFT LOCAL key When the instrument is under local control pressing this key enables secondary function printed in blue above or below each key If the instrument is under remote control the instrument is placed under local control ENTER key The instrument saves the setting value and exits the setting menu A key The setting value increases or the measurement display is changed V key The setting value decreases or the measurement display is changed Indicators Each indicator is lit on when the instrument is under the following states MEAS indicator Measurement is started Ref indicator The reference mode is the user reference mode RMT indicator The instrument is controlled by the remote interface Fixed A indicator The wavelength operation mode is in fixed A mode Optical input 3 2 Rear Panel at a Glance l SA2000 operation f le FIBERPRO a i Made in KOREA CH1 CH2 CH3 A A WZ WZ LINE
15. NR2 format Syntax SREF Response lt angle in Deg gt Example SREF gt 43 45 35 OO 31 13 21 1e SOP Analyzer D User s Manual REF Description Change the reference mode Syntax REF 0 1 Parameter 0 for the factory reference mode 1 for the user reference mode Example REF 1 REF Description Query the current the reference mode The returned message is 0 or 1 in NR2 format Syntax REF Response 0or1 Example REF gt 1 FIXED Description Set the wavelength operation mode fixed A mode or non fixed A mode Syntax FIXED 0 1 Parameter 0 for the non fixed A mode 1 for the fixed A mode Example FIXED 1 FIXED Description Query the current wavelength operation mode The returned message is 0 or 1 in NR2 format Syntax FIXED Response 0or1 Example FIXED gt 1 WAVE Description Choose between the 1 3 um or 1 55 um range Syntax WAVE 1300 1500 Parameter 1300 for 1300 nm wavelength range 1550 for 1550 nm wavelength range Example WAVE 1550 36 WAVE Command Set Description Query the current wavelength range The returned message is 1300 or 1550 in NR2 format Syntax Response Example ANUM WAVE 1300 or 1550 WAVE gt 1550 Description Setthe average number ANUM 1 2 4 8 16 32 Parameter average number 1 2 4 8 16 or 32 Syntax Example ANUM
16. OK button 63 Q alid ldo SOP Analyzer D Windows App User s Manual 7 Extinction Ratio Measurement 7 1 Extinction Ratio When the polarization state of launched light into Polarization Maintaining Fiber PMF is misaligned to the birefringence axis of PMF and if the PMF is perturbed that is stretched or heated the SOP trace of output light from PMF forms circle on Poincare Sphere The degree of misalignment can be obtained from the diameter of the SOP trace circle and represented as the extinction ratio ER in dB scale 7 2 Measurement Procedure im ii ai Kev Lime E oak is Fig 18 ER Measurement To measure ER execute the following procedure 1 Open ER Measurement dialog box from the menu View ER Measure 2 Apply perturbation such as stretching heating or cooling to PMF and monitor the formation of circular trace on the Poincare Sphere while the other optical N sections are kept stationary Remote Controller D 3 Choose three points on the circular SOP trace by clicking the right mouse button Cross marker will appear on the nearest measured data point to mouse clicked point 4 From the three points chosen step 3 a circle is calculated and displayed on Poincare Sphere with its star marked center ER corresponding to this circle size will be displayed in ER Measurement dialog box 5 You may draw a reference circle with dotted lines whose size corresponds to the
17. SOP Analyzer D User s Manual If you press any other key except the ENTER key in the menu the instrument exits this menu without saving the setting value 3 3 11 To Set the Analog Voltage Output Remote operation Execute the AOUT command whose parameter is 0 1 2 3 4 or 5 The description of each parameter is as follows The parameter 0 turns off the analog voltage output Parameter Measurement value ear a value seas 0 None None All channels 0 V CH1 S1 1 1 5V 5V 1 CH2 S2 1 1 5V 5V CH3 S3 1 1 5V 5V CH1 LPER 0 dB 60 dB OV 6V 2 CH2 ANGLE 90 Deg 90 Deg 9V 9V CH3 PERref 60 dB 60 dB 6V 6V CH1 LPER 0 dB 60 dB OV 6V 3 CH2 ANGLE 90 Deg 90 Deg 9V 9V CH3 POWER 50 dBm 10 dBm 5V 1V CH1 PERref 60 dB 60 dB 6V 6V 4 CH2 ANGLE 90 Deg 90 Deg 9V 9V CH3 POWER 50 dBm 10 dBm 5V 1V CH1 DOP 0 100 OV 5V 5 CH2 ANGLE 90 Deg 90 Deg 9V 9V CH3 3 1 1 5V 5V 28 dll SA2000 operation 3 3 12 To Return the Instrument to Local Control from Remote Control Front panel operation Press the SHIFT key Then the instrument becomes under local control and the RMT indicator is turned off NOTE The following values and states of the instrument are saved in a nonvolatile memory and are not deleted when power has been off or after RST command is executed the GPIB address the average number the 1 3 um 1 55
18. User s Manual 2 3 8 Minimum and Maximum Angle of Major Axis minAng amp maxAng minAng and maxAng are minimum and maximum values of the inclination angle of polarization ellipse ANGLE from the time when MinMax key is D Fig 3 Poincare Sphere Representation of State of Polarization I SA2000 operation 3 SA2000 Operation 3 1 Front Panel at a Glance SA2000 SOP ANALYZER Ea FIBERPRO MEAS REF REMOTE Fixed l START REF ON SHIFT A MinMax Fixed A ENTER v SENIERIINEUN o Fig 4 Front Panel of SA2000 Power Switch When this switch is turned on the instrument is initialized and waits for a measurement to be started Front panel display Measurement result is displayed or appropriate information of the instrument is displayed in each setting menu START ADDR key Measurement is started When this key is pressed again the measurement is stopped If this key is pressed together with the SHIFT key the instrument enters GPIB address setting menu MinMax AVG key The stored minimum and maximum readings of LPER PERref and ANGLE are cleared and the min max operation is restarted If this key is pressed together with the SHIFT key the instrument enters the average number setting menu REF ON REF SET key The reference mode toggles between user and factory reference mode whenever this key is pressed
19. bits 1 S El stop bit Ok Cancel 54 Fig 5 Serial Port Setup AI Getting Started Main Page If you select the GPIB protocol you need to f confirm the GPIB Address by the menu GPIB Address mM z SETUP GPIB a FT Fig 6 GPIB Address 5 Main Page The main page consists of the Poincare Sphere polarization ellipse data box check boxes several buttons and the menu bar as shown in Fig 7 It will be explained in more details under each section Li dt T heal r iwal Bam i A FRO i i j a z oa Fan MM Fig 7 Main Page 55 Q alidi SOP Analyzer D 56 Windows App User s Manual 5 1 Poincare Sphere The State Of Polarization SOP of optical signal is represented as a point on a Poincare Sphere The SOP trace history can be represented as discrete dots or discrete dots and connecting lines Poincare Sphere window has two kinds of special buttons a zoom control button and a view angle control button 5 1 1 General Feature The Poincare Sphere is represented by three points S1 S2 and S3 and three great circles an equator connecting S1 and S2 points on Poincare Sphere and two circles of longitude connecting S1 and S3 and connecting S2 and S3 The coordinates of S1 S2 and S3 on Poincare Sphere are 1 0 0 0 1 0 and 0 0 1 The equator connecting S1 and S2 corresponds to liner polarization states Northern and southern hemispheres of Poinca
20. messages should be displayed FIBERPRO SA2000 FIBERPRO SA2000 SOP Analyzer GPIB ADDRESS 10 After four indicators are turned on and off successively the measurement display window is turned on Notice that the instrument enters the latest measurement display window automatically LPER dB ANGLE Deg 3 3 2 To Start or Stop a Measurement Front panel operation Press the START key A measurement is started and the MEAS indicator is turned on If the instrument is working on a measurement a measurement is stopped and the MEAS indicator is turned off Remote operation Execute the MEAS command whose parameter is 0 or 1 1 is for a measurement start and 0 is for a measurement stop 21 FIBERPRO User s Manual 3 3 3 To Change the Measurement Display Front panel operation Press the A key or W key until the desired measurement display appears The sequence of the measurement display is as follows PERref POWER PERref POWER A By pressing By pressing V key A key minLPER minPERr 22 l SA2000 operation 3 3 4 To Restart the Min max Operation Front panel operation Press the MinMax key After the following message is displayed the stored minimum and maximum readings are cleared and the min max operation is restarted MINMAX RESTARTED After about 0 5 seconds the instrument returns to the measurement display window The stored mi
21. optical source it is highly recommended to use coherent control mode of tunable laser to reduce interference effect in measurement In general broadband laser source such as multimode Fabry Perot laser gives more stable measurement results 5 2 1 3 1 55 um Selection With the 1 3 1 55 um key shift fixed A of the front panel users can choose one of two operating wavelength ranges represented by 1300 nm and 1550 nm 1300 nm range corresponds to the wavelength range less than 1420 nm and 1550 nm corresponds to the wavelength range larger than 1430 nm 1 3 1 55 um selection has an effect on two measurement parameters One is optical power measurement because SA2000 s power measurement function is calibrated at two wavelengths 1300 nm and 1550 nm The other is that the sign of Stokes parameter S3 will change according to the 1 3 1 55 um selection All the other measurement parameters of SA2000 are independent of 1 3 1 55 um selection 5 3 Fixed X Operation Mode In normal operation mode non fixed A mode SA2000 automatically calculates phase retardation of wave plate 2 in optical head of SA2000 from the ratio of F to F in Eq 2 2 which is equal to tan a Since the amplitude F and F are proportional to the magnitude of S1 and S2 this calculation becomes uncertain as S1 and S2 approach zero simultaneously that is circular polarized state and gives the most accurate value when the light is linearly polarized 45 QO Q
22. press the ENTER key to save the setting value and exit this menu WAVELENGTH SET wait l SA2000 operation D If you press any other key except the ENTER key in the menu the instrument exits this menu without saving the setting value Remote operation Execute the WAVE command whose parameter is 1300 or 1550 1300 is for 1300 nm wavelength range and 1550 is for 1550 nm wavelength range NOTE 1 1 3 1 55 um wavelength range selection affects two parameters for measurement results One is optical power that is calibrated at both wavelengths The other is normalized Stokes parameter S3 which has opposite sign with same magnitude at each wavelength range selection Refer to 5 2 1 3 1 55 um Selection for more detailed explanation 2 The wavelength operation mode fixed A and non fixed A and 1 3 1 55 um wavelength range selection are independent of each other that is there aren t any relationships between them 3 3 10 To Set the GPIB Address Front panel operation Press the SHIFT key and the START key Then the instrument enters the GPIB address setting menu and the current GPIB address is displayed as follows GPIB ADDRESS SET ADDR 15 Press the A key or V key to increase or decrease the blinking digit If displayed address is the desired value press the ENTER key to save the setting value and exit this menu GPIB ADDRESS SET wait 27 OO O al 3 1J 1e
23. the User Reference Angle 3 3 6 To Change the Reference Mode 3 3 7 To Set the Average Number 3 3 8 To Change the Wavelength Operation Mode fixed A or non fixed A mode 3 3 9 To Choose between 1 3 um and 1 5 um Range 3 3 10 To Set the GPIB Address 3 3 11 To Set the Analog Voltage Output 3 3 12 To Return the Instrument to Local Control from Remote Control 3 4 Remote Interface 3 4 1 Control via RS 232 3 4 2 Control via GPIB 4 Command Set 4 1 Operation related commands 4 1 1 Measurement Related Commands 4 1 2 Measurement Configuration Related Commands 4 1 3 Analog Output Related Commands 4 1 4 System Related Commands 4 2 IEEE 488 2 Command Commands 4 3 RS 232 Interface Commands 4 4 Error Codes 5 Comments for Accurate Measurement 5 1 Optical Source 5 2 1 3 1 55 um Selection 5 3 Fixed Operation Mode 5 4 Changing Adaptor II General Information 1 General Information 1 1 Warning Dangerous voltages capable of causing injury or death are present in this instrument Use extreme caution whenever the instrument covers are removed Do not remove the covers while the unit is plugged into a live outlet To avoid electric shock the power cord protective ground conductor must be connected to ground No user serviceable parts exist in this instrument Refer all services to qualified personnel 1 2 Caution This instrument may be damaged if operated with the line voltage selector set for the wron
24. 40 nm Wavelength Range Input Power Range 50 dBm 10 dBm Measurement Speed 12 Hz 24 Hz Poincare Sphere Display Accuracy 0 6 Accuracy of Inclination Angle 0 2 9 Accuracy of Degree of Polarization 1 7 Extinction Ratio Range 0 dB 50 dB Accuracy of Optical Power Measurement 0 2 dB Optical Input FC and free space lt 3 mm Analog Output 3 analog ports 5 user selectable modes Mode 1 S1 S2 S3 Mode 2 LPER PERref ANGLE Mode 3 LPER Power ANGLE Mode 4 PERref Power ANGLE Mode 5 DOP ANGLE S3 AC Power Input 100 V 125 V 210 V 250 V 50 Hz 60 Hz Dimensions 86 H x 212 W x 420 D mm Operating Temperature 10 C 40 C Storage Temperature 10 60 C Interface RS232 GPIB General Information This range is for fixed wavelength operation mode calibrated mode 2 For variable wavelength operation mode this range is reduced to 1260 1340 nm 1520 1620 nm The optical specifications of this table are based on the average number of 2 corresponding 12 Hz At the condition of a single average the measurement speed is 24 Hz For DOP gt 90 9 At linear polarization For variable wavelength operation mode this accuracy is limited to the polarization state with ellipticity angle within 35 35 and DOP gt 90 At power calibrated wavelength 1 3 um and 1 5
25. 5 um S1 S2 S3 are normalized Stokes parameters LPER is polarization extinction ratio to linear polarization and PERref is polarization extinction ratio to particular linear reference polarization ANGLE is the inclination angle of polarization ellipse 1 1 1 10 SOP Analyzer l D User s Manual 2 Introduction of SA2000 2 1 Introduction FIBERPRO s SOP Analyzer SA2000 provides polarization analysis including the State Of Polarization SOP Degree Of Polarization DOP Polarization Extinction Ratio PERref LPER and inclination angle of polarization ellipse of input light Refer to 2 3 What you can measure with SA2000 for a detailed explanation of each parameter SA2000 has various applications in Polarization Mode Dispersion PMD measurement and polarization maintaining device characterization and fabrication Some PMD measurement methods for example Jones matrix eigenanalysis method scanning principal state of polarization method and 3 Stokes parameter wavelength scanning method according to ITU T G 650 require exact SOP measurement SA2000 can discriminate the SOP with Poincare Sphere display accuracy of 0 6 SA2000 measures Polarization Extinction Ratio PER with dynamic range of 0 50 dB The PER is the essential characteristic of Polarization Maintaining Fiber PMF PM patch cord and PM devices There are many optical devices that are pigtailed to PMF such as laser diode polarizer polari
26. Command errors are detected 4 16 EXE Execution Error Execution errors are detected 3 8 i ER Error Device dependent errors are detected 4 QYE Query Error Query errors are detected 1 2 TRG Request Control Not Used always 0 0 4 OPC l The PS has completed all selected Operation Complete pending operations Status byte register amp Service request enable register The Status Byte Register SBR is the summary level register in the status reporting structure of the SOP Analyzer The SBR contains summary bits 32 SA2000 operation that monitor activity in the SESER and output message queue You can read the contents of the SBR by executing the STB query or serial poll SBR is cleared 1 at power on or 2 by CLS command The Service Request Enable Register SRER enables one or more summary bits in the SBR to generate a service request to the controller To generate a service request you should enable the corresponding bit in the SRER by executing the SRE command The SRER is cleared at power on When the enabled summary bit in the SBR is set the MSS bit and the RQS bit in the SRER is set and service request is generated to the controller Descriptions of each bit in the SRER and the SBR are as follows Service Request Enable Register Status Byte Register Bit Weight Enables Condition 7 128 User Definable Not Used Not Used always 0 RQS Request Service MSS Master Summary Status
27. E Saus GENERATION S a 7 6 ee Mav 3 2 1 0 eRegster MSS LOGICAL OR Sr A ee 7 5 4 3 2 1 0 Service Request Enable Register 31 QO Q al 13 1J ie SOP Analyzer D User s Manual Standard event status enable register amp Standard event status register The Standard Event Status Register SESR monitors the status events of the SOP Analyzer When one of these events occurs the event sets the corresponding bit in the register You can read the contents of this register by executing the ESR query The returned value is the total bit weights of all of the bits SESR is cleared 1 at power on 2 by CLS command or 3 after being read The Standard Event Status Enable Register SESER allows one or more events in the SESR to generate a summary bit The summary bit will set the ESB bit the bit 5 in the Status Byte Register SBR To generate a summary bit you should enable the corresponding bit in the SESER by executing the ESE command SESER is cleared at power on The status event of the SOP Analyzer that each bit of the SESR and SESER represents is as follows Standard Event Standard Event Status Enable Register Status Register Bit Weight Enables Condition 128 PON Power ON Power off on transition has occurred 64 URQ User Request Not Used always 0 7 6 5 32 CME Command Error
28. None Example RMT LOC Description Place the instrument in the local operation Syntax LOC Parameter None Example LOC 43 O T 21 14 12 10 SOP Analyzer D 44 User s Manual 4 4 Error Codes Error Number Description Command errors 101 Invalid character 102 Syntax error 103 Invalid separator 104 Data type error 108 Parameter not allowed 109 Missing parameter 112 Program mnemonic too long 113 Undefined header Execution errors 222 Data out of range 224 Illegal parameter value 350 Too many errors Query errors 410 Query Interrupted 420 Query unterminated 430 Query deadlock state 440 Query unterminated after indefinite response Device dependent errors 201 Input power is too low 202 Input power is too high 521 Input buffer overflow RS 232 only 522 Output buffer overflow RS 232 only m ERROR command queries the oldest error from the error queue m When the query result for ERROR equals 0 no error it means no error has occurred Command errors set the CME bit the bit 5 of Standard Event Status Register SESR m Execution errors set the EXE bit the bit 4 of SESR Device dependent errors set the DDE bit the bit 3 of SESR Query errors set the QYE bit the bit 2 of SESR Comments for l accurate measurement 5 Comments for Accurate Measurement 5 1 Optical Source When using tunable laser as an
29. SOP Analyzer User s Manual FIBERPRO www fiberpro com SOP Analyzer User s Manual FIBERPRO tel 82 42 369 0030 fax 82 42 369 0040 http www fiberpro com email fiberpro fiberpro com MA SA2 0206 00 Contents SOP ANALYZER USER S MANUAL 07 1 General Information 08 10 11 13 14 15 16 1 1 Warning 1 2 Caution 1 3 Line Voltage Selection 1 4 Service 1 5 Accessories 1 6 Specifications 2 Introduction of SA2000 2 1 Introduction 2 2 Measurement Principle of SA2000 2 3 What You can Measure with SA2000 2 3 0 Reference Linear Polarization 2 3 1 Normalized Stokes Parameter S S S 2 3 2 Degree of Polarization DOP 2 3 3 Linear Polarization Extinction Ratio LPER 2 3 4 Polarization Extinction Ratio to Reference Polarization PERref 2 3 5 Inclination Angle of Polarization Ellipse ANGLE 2 3 6 Minimun Linear Polarization Exinction Ratio minLPER 2 3 7 Minimum Extinction Ratio to Reference Polarization minPERr 2 3 8 Minimum and Maximum Angle of Major Axis minAng amp maxAng 17 3 SA2000 Operation 19 20 21 22 23 24 25 26 27 28 29 30 34 35 37 38 39 43 44 45 46 3 1 Front Panel at a Glance 3 2 Rear Panel at a Glance 3 3 How to Use SOP Analyzer 3 3 0 Before the Start 3 3 1 To Power on the Instrument 3 3 2 To Start or Stop a Measurement 3 3 3 To Change the Measurement Display 3 3 4 To Restart the min max Operation 3 3 5 To Set
30. all not apply to failure or deficiency which has been caused by misuse abnormal or unusually heavy use neglect alteration improper installation unauthorized repair or modification improper testing accident or causes external to the product such as but not limited to excessive heat or humidity or improper installation Such warranty shall also not apply to expendable components such as but not limited to fuse power cord and screws FIBERPRO makes NO WARRANTY as to any products which are supplied by it AS IS or as to any experimental or developmental products or as to products not manufactured by FIBERPRO FIBERPRO s warranty as set forth above shall not be enlarged diminished or affected by and no liability shall arise out of FIBERPRO s rendering of technical advice in connection with Purchaser s order The warranty set forth above is not assignable by Purchaser Purchaser s sole remedy under the above warranty shall be repair or replacement as provided above FIBERPRO s sole and exclusive maximum liability for any claim by Purchaser or anyone claiming through or on behalf of Purchaser arising out of Purchaser s order or the above warranty shall not in any event exceed the actual amount paid by Purchaser to FIBERPRO for the product In no event shall FIBERPRO be liable for any indirect incidental collateral exemplary consequential or special damages or losses arising out of Purchaser s order of products delivered under it or
31. anel of SA2000 Stop your work and put SA2000 on the flat table And then pull out the cables Fuse holder box is left side of the rear panel 2 Open fuse holder box Lever with a small minus screwdriver cautiously 66 dll Replacing Fuse 3 Pull out fuse holder Pull out fuse holder cautiously with a small minus screwdriver 4 Replacing fuse Pull out the old fuse with care and replace to a new one Put the fuse holder into fuse holder box Check the direction of the white arrow key on the front of the fuse holder 67 68 alidi SOP Analyzer D Replacing Fuse 6 Adjust the power voltage E FiREAPR Finterao muds ED Adjust the power voltage 100 120 220 or 240 7 Close the fuse holder box a a id I rTIaEnPnd feds ssa inmi m EEE A gegen i P WARNING Close the fuse holder box NOTE Use the proper fuse for the line voltage selected Use only fuses with the required current rating and of the specified type as replacements DO NOT use a mended fuse or short circuit the fuse holder in order to by pass a blown fuse Find out what caused the fuse to blow dll Limited Warranty FIBERPRO Limited Warranty FIBERPRO warrants its products to be in conformance to mutually agreed upon written specifications and to be free from defects in material and workmanship The warranty period of SOP Analyzer is 1 year The above warranty period shall begi
32. ce linear polarization The SA2000 has factory set reference linear polarization direction which is nearly parallel to the keyway direction of the optical adaptor Also any user can set a particular linear polarization as his own reference polarization Refer to 3 3 5 To set the user reference angle to see how to set user reference polarization and 3 3 6 To change the reference mode to see how to change reference polarization from factory reference to user reference and vice versa 2 3 1 Normalized Stokes Parameter S S S The Stokes Parameters are defined as S total power Polarized Punpolarized s X polarized power polarized power s 45 polarized power 45 polarized power s right circular polarized power left circular polarized power Here X and y represent two orthogonal linear polarization direction and X corresponds to reference linear polarization direction Normailzed Stokes Parameters S S S are Stokes parameters divided by Sp S S2 Se Se zo Sa 1 2 So 3 So 13 N User s Manual 2 3 2 Degree Of Polarization DOP Degree Of Polarization DOP is the ratio of polarized optical power to total optical power DOP en af Sy S S p pol T Dee 2 3 3 Linear Polarization Extinction Ratio LPER LPER explains how much the state of polarization is close to linear polarization state regardless of the orientation of the major axis Refer to Fig 2 and Fig 3 for the definition o
33. emote operation Execute the SREF command whose parameter is the user reference angle in degree unit If there is not any parameter after the command header the current inclination angle of the polarization ellipse is set as the user reference angle The reference mode is changed to the user reference mode automatically after executing this command Refer to 2 3 0 Reference linear polarization for the specific definition of the reference angle l SA2000 operation 3 3 6 To Change the Reference Mode Front panel operation Press the REF ON key to change the reference mode to another mode user or factory reference mode If the reference mode is the user reference mode the REF indicator is turned on Remote operation Execute the REF command whose parameter is 0 or 1 Ois for changing the reference mode to the user reference mode and 1 is for changing the reference mode to the factory reference mode 3 3 7 To Set the Average Number Front panel operation Press the SHIFT key and the MINMAX key Then the instrument enters the average number setting menu and the current average number is displayed as follows AVG NUMBER SET ANUM 16 Press the A key or V key to increase or decrease the blinking digit If a displayed number is a desired value press the ENTER key to save the setting value and exit this menu AVG NUMBER SET wait If you press any other key except the ENTER key in the menu t
34. f the parameters in the following equation E 2 LPER 10 X log 10 X log E n tan 2 3 4 Polarization Extinction Ratio to Reference Polarization PERref PERref explains how much the state of polarization is close to a particular linear reference polarization state Refer to Fig 2 and Fig 3 for the definition of the parameters in the following equation 2 E PERref 10 X log 10Xlog 2 x tan NOTE PERref is a useful value when evaluating PM fiber patch cord if the reference polarization direction is parallel to the direction of the keyway of adaptor dll Introduction of SA2000 2 3 5 Inclination Angle of Polarization Ellipse ANGLE ANGLE is the angle between the major axis of polarization ellipse and the linear reference polarization direction ANGLE is measured in a clockwise direction from a reference polarization direction when viewed from light propagation direction ANGLE 6 Refer to Fig 2 and Fig 3 for the definition 0 2 3 6 Minimum Linear Polarization Extinction Ratio minLPER minLPER is the minimum value of Linear Polarization Extinction Ratio LPER from the time when MinMax key is pressed 2 3 Minimum Extinction Ratio to Reference Polarization minPERr minPERr is the minimum value of Extinction Ratio to Reference Polarization PERref from the time when MinMax key is pressed Fig 2 Elliptically Polarized Light 15 N
35. g AC line voltage or if the wrong fuse is installed Before using the instrument be sure to read through the operation manual to ensure proper operating procedures 1 3 Line Voltage Selection This instrument can operate from any single phase AC power source that supplies 100 V 120 V 220 V 240 V 10 at a frequency of 50 60 Hz Before connecting the power cord to a power source check if the line voltage selector located in the rear panel is set correctly for 230 V operation use the 220 V setting Conversion to other AC input voltage requires adjusting the line voltage selector This instrument has a detachable three wire power cord for connection to the power source and to a protective ground The exposed metal chassis of the instrument is connected to ground via the power line cord to protect against electrical shock Always use a socket outlet that has a properly connected protective ground The fuse used by this instrument is T2AL 250VAC O aildi SOP Analyzer D User s Manual 1 4 Service Do not attempt to service or adjust this instrument unless an authorized person is present Do not install substitute parts or perform any unauthorized modifications to this instrument Contact FIBERPRO or your local distributor for service support 1 5 Accessories AC power cord SA2000 operating program CD N type wide keyway adaptor User s Manual 1 6 Specifications 1250 1400 nm 1450 16
36. he instrument exits this menu without saving the setting value Remote operation Execute the ANUM command whose parameter is the average number The possible parameter value is 1 2 4 8 16 or 32 25 Pacner EZ 26 User s Manual 3 3 8 To Change the Wavelength Operation Mode fixed A or non fixed mode Front panel operation Press the Fixed A key to change the current wavelength operation mode to another mode fixed A or non fixed A mode Ifthe wavelength operation mode is changed into fixed A mode the wave plate s phase retardation is fixed at the value at the moment of pressing the Fixed A key and the Fixed A indicator is turned on Remote operation Execute the FIXED command whose parameter is 0 or 1 O is for setting the wavelength operation mode to the non fixed A and 1 is for setting it to the fixed A mode If the wavelength operation mode is changed into fixed A mode the wave plate s phase retardation is fixed at the value at the moment of executing the FIXED 1 command and the Fixed A indicator is turned on 3 3 9 To Choose between 1 3 um and 1 55 um Range Front panel operation Press the SHIFT key and the Fixed A key Then the instrument enters the wavelength range setting menu and the current wavelength range is displayed as follows WAVELENGTH SET WVL 1550 Press the A key or V key to toggle between 1300 nm range and 1550 nm range If a displayed range is a desired value
37. n on the date of shipment by FIBERPRO to Purchaser or if Purchaser is an authorized reseller of such FIBERPRO products from the date of shipment by the reseller to the reseller s original customer FIBERPRO shall at its option and cost either repair or replace the products with new or reconditioned products and parts provided the products are returned by Purchaser along with dated and serialized proof of purchase to FIBERPRO or to an FIBERPRO authorized service facility transportation and insurance prepaid within the above warranty period and which are found by FIBERPRO to be defective within the terms of this warranty Products repaired or replaced by FIBERPRO under this warranty will be returned by FIBERPRO to Purchaser transportation and insurance prepaid Replaced products and parts shall become the property of FIBERPRO If any products returned by Purchaser to FIBERPRO for repair or replacement are found by FIBERPRO after examination and testing not to be defective FIBERPRO shall so advise Purchaser and shall dispose of any such products in accordance with Purchaser s instructions and at Purchaser s cost and Purchaser shall reimburse FIBERPRO for examination and testing expenses incurred at FIBERPRO s then current rates CONTINUED USE OR POSSESSION OF THE PRODUCTS AFTER EXPIRATION OF THE ABOVE WARRANTY PERIOD SHALL BE CONCLUSIVE EVIDENCE THAT THE WARRANTY IS FULFILLED TO THE FULL SATISFACTION OF PURCHASER The warranty set forth above sh
38. nalyzer D User s Manual SRE Description Query the contents of the Service Request Enable Register The bit 6 of the binary representation is always sent with the value zero The returned message is the total bit weights of all of the bits in NR1 format Syntax SRE Response The bit value for the register In the range of O through 63 or 128 through 191 Example SRE gt 48 STB Description Query the contents of the Status Byte Register The returned message is the total bit weights of all of the bits in NR1 format Syntax STB Response Bit Definition Value 7 MSB Not used 0 6 RQS request service 64 5 ESB SESR summary bit 32 4 MAV message in the output queue 16 3 Not used 0 2 Not used 0 1 Not used 0 0 Not used 0 Example STB gt 80 42 Il Command Set TST Description Perform a self test and place the results of the test in the output queue Syntax TST Response 0 for self test pass 1 for self test failure Example TST gt 0 wAI Description Prevent the instrument from executing any further commands until the current command has finished executing All pending operations are completed during the wait period Syntax WAI Parameter None Example WAI 4 3 RS 232 Interface Commands RMT Description Place the instrument in the remote operation for RS 232 Syntax RMT Parameter
39. nimum and maximum readings are minimum LPER minimum PERref minimum and maximum of inclination angle of polarization ellipse You can see them in the following measurement display window by pressing the A key or W key Refer to 3 3 3 To change the measurement display minLPER dB Minimum LPER minPERr dB Minimum PERref minANG Deg Minimum inclination angle maxANG Deg Maximum inclination angle Remote operation Execute the MINMAX command to restart the min max operation To get the stored minimum and maximum readings execute the MINMAX query command 23 OO Q al 13 1J fe SOP Analyzer D User s Manual 24 3 3 5 To Set the User Reference Angle Front panel operation Press the SHIFT key and the REF ON key The instrument enters the reference angle setting menu and the current inclination angle of polarization ellipse is displayed as follows Notice that the displayed inclination angle is relative to the factory set reference angle REFERENCE SET ANGLE 10 9 Deg Press the A key or W key to increase or decrease the blinking digit If a displayed angle is a desired value press the ENTER key to save the setting value and exit this menu The reference mode is changed to the user reference mode automatically and the Ref indicator is on REFERENCE SET wait If you press any other key except the ENTER key in the menu the instrument exits this menu without saving the setting value R
40. out of the above warranty including without limitation loss of use profits or goodwill Some countries do not allow the exclusion of limitation of incidental or consequential damages so the above limitation or exclusion may not apply to Purchaser EXCEPT AS STATED ABOVE IN THIS PARAGRAPH THE FOREGOING WARRANTIES ARE IN LIEU OF ALL OTHER CONDITIONS OR WARRANTIES EXPRESS IMPLIED OR STATUTORY INCLUDING WITHOUT LIMITATION AN IMPLIED CONDITION OR WARRANTY OF MERCHANTABILILTY OR FITNESS FOR A PARTICULAR PURPOSE AND OF ANY OTHER WARRANTY OBLIGATION ON THE PART OF FIBERPRO 69
41. pressed again its annunciator is turned off The example is as follows LPER dB LPER dA ANGLE Deg ANGLE Deg The Shift key has been pressed When input power is too high or too low When input optical power is too high or too low to make an accurate measurement the instrument displays no numeric value but or aS a measurement result The indicates that input power is too high and the indicates that input power is too low The example is as follows LPER dB LPER dB ANGLE Deg ANGLE Deg Input power is too high Input power is too low If STOKES or EXRATIO query command is executed in the remote operation when the input power is too high or too low the instrument generates the device dependent error and saves it to the error queue Refer to 4 4 Error codes for more specific descriptions The return messages are all zero except for the optical power value The returned optical power is 10mW when the input power is too high and 1nW when the input power is too low l SA2000 operation 3 3 1 To Power on the Instrument Front panel operation Check whether the voltage selector switch is selected correctly for input AC line voltage Connect the power cord to the power entry module at the rear of the instrument and the other end to a suitable AC line power receptacle Press the POWER switch the following power on
42. re Sphere represent right hand and left hand elliptical polarization states Especially S3 represents right hand circular polarization state and S3 represents left hand circular polarization state The parts of the three great circles located in the front hemisphere of Poincare Sphere are dark red lines and the rear hemisphere are dotted blue lines EES i i T ul SE u h mp 2 fi n T F j r J I l ae i ZiM ahi 4 21 e a 7 Fig 8 Poincare Sphere Twin Pee 5 1 2 Trace of SOP The SOP trace on Poincare Sphere is represented as discrete dots dark red dots for front hemisphere and blue dots for rear hemisphere Current SOP is represented by bigger dot than others You can connect trace points by checking Trace on Sphere check box The connecting line is part of the great circle connecting the neighboring two points PILET ay aay ah nn a Ir N pad E u DREI j E a TENI Da iv m4 a H a ER ga di 4 31 81 dl min hlE 09 00 Deg er atur lug mie dr hil rhein i i i k ne a a r Zi hie al zajel m Fig 9 Trace on Poincare Sphere 5 1 3 Maximum SOP Data Points on Poincare Sphere You can change maximum displayed SOP data points on Poincare Sphere using the menu Setup Poincare Sphere up to 5 000 points In connected trace mode the maximum displayed data points will be reduced to 1 000 If the number of data displayed exceeds maximum data points
43. same as for GPIB interface except the RMT and LOC command When you use RS 232 interface it is necessary to send the RMT command first to place the SOP Analyzer under remote control 3 4 2 Control via GPIB Interface capabilities The interface capabilities that the PS implements as defined by IEEE 488 1 are SH1 AH1 T6 L4 SR1 RL1 PPO DC1 DTO CO The PS implements all necessary common commands and the status reporting structure defined by IEEE 488 2 A summary of the common commands is as follows SA2000 operation Command Query Function ESE ESE standard Event Status Enable command query ESR standard Event Status Register query SRE SRE Service Request Enable command query STB STatus Byte register query CLS CLear Status command RST ReSeT command IDN instrument s IDeNtification query OPC OPC OPeration Complete command query WAI WAIt command TST self TeST query Status reporting structure The status reporting structure of the SOP Analyzer is shown below Command Operation Complete Error ge jm 4 Standard Event Status Register SI an a w d N LOGICAL OR 7 65 a 3 2 1 0 rk Enable Register OUTPUT QUEUE 0 ol lo 0 0 Y v RQS v Y v Y Y Y SERVIC
44. te adaptor according to your connector is important to measure accurate inclination angle of the polarization ellipse After changing the adaptor new reference angle setting with master PM patch cord is highly recommended Refer to 3 3 5 To set the user reference angle to see how to set new reference angles When changing the adaptor use the screws supplied by FIBERPRO Any screw longer than the supplied ones may disturb the operation of the rotating optical parts SOP Analyzer Windows App User s Manual FIBERPRO 2002 4 15 Contents WINDOWS APPLICATION USER S MANUAL 51 52 54 54 55 56 57 58 59 60 61 62 63 64 65 66 69 1 Feature and Requirement 1 1 Feature 1 2 System Requirement 2 Installation 3 Getting Started 4 GPIB RS232 5 Main Page 5 1 Poincare Sphere 5 1 1 General Feature 5 1 2 Trace of SOP 5 1 3 Maximum SOP Data Points on Poincare Sphere 5 1 4 Holding the SOP Trace 5 1 5 View Angle Controller 5 1 6 Zoom Controller 5 1 7 Clearing the SOP Trace 5 2 Polarization Ellipse 5 3 Data Box 5 4 File Management 5 5 Print 6 Graphs 6 1 Selection Graph Parameters 6 2 Changing Y axis Range 7 Extinction Ratio Measurement 7 1 Extinction Ratio 7 2 Measurement Procedure 8 Remote Controller Replacing Fuse FIBERPRO Limited Warranty 49 Winclows App Features and Requirements 1 Features and Requirements 1 1 Features Communication e RS232
45. the oldest point will disappear 57 al 11J Te SOP Analyzer D Windows App User s Manual 5 1 4 Holding the SOP Trace You can hold the measurement result by checking Hold on the checkbox 5 1 5 View Angle Controller There are five buttons up down left right arrows and home wa a for viewing the angle controller as shown in Fig 10 Up down ri arrow buttons will be used to move view angles to vertical Fig 10 direction and left right arrow buttons will be used to move View Angle view angles to horizontal directions The H button means m Home Pressing H the view angle changes to the initial view angle There is another way to change the view angle using the mouse Put the mouse on Poincare Sphere and drag the mouse pressing left mouse button to the desired direction 5 1 6 Zoom Controller ZI0M There are three buttons for zoom controls as shown in al z gt Fig 11 left right arrows and zoom current status button Left arrow button zooms out and right arrow N button zooms in on the Poincare Sphere and current zoom status is displayed on the center button Pressing the center button the zoom status will return to zoom 1 state 5 1 7 Clearing the SOP Trace You can erase displayed SOP trace using menu File New or New File icon on menu bar MinMax button of remote controller window also erases the displayed SOP trace The File New erase does not reset minLPER
46. the range of 0 through 255 Bit Definition Value 7 MSB Power On 128 6 Not used 0 5 Command Error 32 4 Execution Error 16 3 Device Dependent Error 8 2 Query Error 4 1 Not used 0 0 Operation Complete 1 Example ESR gt 16 IDN Description Query the instrument identification Syntax IDN Response lt Manufacturer gt lt Model gt 0 lt Firmware version gt Example IDN FIBERPRO PM5001 0 V1 00 40 Command Set OPC Description Set the OPC bit in the Standard Event Status Register when all pending device operations have been completed Syntax OPC Parameter none Example oPC OPC Description Place ASCII 1 in output queue when all pending device operations have been completed Syntax OPC Response 1 is always returned Example OPC gt 1 RST Description Set the instrument to the reset setting stored internally Syntax gt RST Parameter None Example RST SRE Description Set the Service Request Enable Register bits Syntax gt SRE lt value gt Parameter Decimal value in the range of 0 through 255 Bit Definition Value 7 MSB Not used 0 6 RQS request service 64 5 ESB SESR summary bit 32 4 MAV message in the output queue 16 3 Not used 0 2 Not used 0 1 Not used 0 0 Not used 0 Example SRE 48 41 OO O l3l 3 1J 1e SOP A
47. um range selection the reference mode the user reference angle the current measurement function the wavelength operation mode fixed A or non fixed A the fixed wave plate s phase retardation if the instrument was powered off in fixed A mode 3 4 Remote Interface 3 4 1 Control via RS 232 RS 232 was originally designed as the interface between DTE Data Terminal Equipment and DCE Data Communications Equipment by serial binary data interchange Since most personal computers are now equipped with RS 232 you can easily interface the SOP Analyzer with a personal computer for remote control Configuration for RS 232 interface Baud rate 57 600 Data bits 8 bit Parity None Stop bits 1 bit Message terminator Carriage Return CR 29 OO Q al 13 1J ie SOP Analyzer D 30 User s Manual Connection to a computer The SOP Analyzer can be programmed with a personal computer over RS 232 using a minimum three wire interface With a three wire interface the software controls the data flow between the SOP Analyzer and a personal computer This provides a much simpler connection between devices because you can ignore hardware handshake requirements RS 232 wiring from a personal computer s serial port into the SOP Analyzer serial interface device is as follows PC SOP analyzer RxD 2 RxD 2 TxD 3 TxD 3 GND 5 GND 5 RS 232 Commands The commands set for RS 232 interface is almost the
48. ve button Then the SOP Data File Save dialog box as shown in Fig 15 will be appear Enter the number of samples and period or rate Maximum number of samples is limited to 10 000 and minimum period or maximum rate value is limited according to the setting value of the average number For example ifthe average number is 2 minimum period is 0 833 sec or maximum rate is 12 Hz To start the save press SAVE button You can see the progress of the saving process With OK button you can stop the saving process with the saving data gathered until that time Cancel button stops the saving process without saving the data If the number of gathered data reaches the sampling size this dialog box disappears automatically and saves the file SEIEN z GE ite a aaa Fig 14 File Save Dialog MET Main Page D The Number of Samples mi Perindjfeq 0 089939 Asch 12 000000 Fae Name Coty DecumoelssSONAME SOP SAVE rm Cancel Fig 15 File Save Dialog One datum consist of 5 parameters which is POWER S1 S2 S3 DOP The extended file name of the SOP Analyzer is SOP The SOP file is ASCII Format You can see and edit by any windows editor like Notepad WordPad Choosing the menu Open from the menu File you can load the saved file 5 5 Print Choosing the menu Print from the menu File
49. zation beam splitter modulator etc SOP and PER measurements are effective methods in aligning polarization axis of such devices NOTE 1 SA2000 application program supplied with SA2000 has another Polarization Extinction Ratio PER measurement function In this program PER is measured from the diameter of circular trace of state of polarization on Poincare Sphere which is generated from perturbing polarization maintaining fiber through stretching heating or cooling the fiber Introduction of SA2000 a 2 2 Measurement Principle of SA2000 SA2000 uses a unique technique a rotating wave plate and a rotating polarizer method for SOP analysis In this technique the SOP measurement is intrinsically independent of optical wavelength Thus SA2000 measures SOP exactly over a wide wavelength range without wavelength calibration The optical light incident into SA2000 passes through a wave plate rotating in clockwise direction and a polarizer rotating in counterclockwise direction and is then detected by photo diode Fig 1 Wave plate and polarizer rotate with the same speed in opposite directions of each other From the Fourier transform of the signal monitored by photo diode detector during one complete rotation data 4 Stokes parameters are acquired Detailed relationship between Fourier transform components and 4 Stokes parameters is given by the following proportional equations Eq 2 1 ee F oc s is cos
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