Optilab LT-1550 User`s Manual
Contents
1. Insufficient ventilation Place unit in well ventilated area or supply additional fans for ventilation Optical output power unstable Insufficient optical output isolation Connect isolator of corresponding wavelength to optical output connector Blown fuse Check fuse and replace if it has blown Unit does not power up Insufficient electrical voltage Check that the electrical supply is at least 110 VAC Power cord is loose Plug power cord is firmly into the unit Unit resets or blinks on and off Insufficient electrical voltage Check that the electrical supply is at least 110 VAC ND NOI NOD DOI AQ 0O00 OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44t Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 a 602 343 1489 4 Service and Support Optilab 4 1 Warranty Optilab LLC guarantees this LT 1550 12 5G unit to be free of defects for 1 year from the date of shipment This term includes a 12 month guarantee for the tunable laser module and 24 months for other electronics and mechanical parts The guarantee does not cover any damages resulting from the misuse or improper handling of the equipment or any incidental or consequential loss Note that the warrant2. Optilab Lightwave Transmitter LT 1550 Series User s Manual Narrow linewidth DFB laser Broadband Lithium Niobate modulator High gain modulator driver module Automatic Bias Control Circuit to ensure stable operation Excellent eye diagram for error free transmission Connector choice FC APC FC UPC SC APC SC UPC LC APC LC UPC Polarization Maintaining PM output available on 12 5Gb s model High reliability Telcordia qualified components Three year limited warrant OptiLab LLC undertakes continuous and intensive OptiLab LLC product development to ensure its products perform at 5110 N 44th Street the highest technical standards As a result the Suite 200L specifications in this document are subject to change Phoenix AZ 85018 sales oequest com www oequest com Tel 602 343 1493 Fax 602 343 1489 Optilab 1 User Safety The LT 1550 12 5G emits high intensity invisible light from the optical output receptacle Avoid direct exposure to skin and eyes The equipment case is fully certified for EMS protection The user should never open the equipment case any attempt will void the warranty and may result in electric shock and EMS attacks to equipment in the vicinity The user should avoid using any solvent or vaporizing chemical to clean the equipment panel or case It may result in damage to the surface and internal circuits OptiLab LLC undertakes continuous a
3. 3 Select the Status parameter and change it to Enable for optical power Over Temperature Procedure 1 When the Temp Overheat warning appears the optical output will shutdown automatically and the system will freeze 2 Turn the main key switch counter clockwise to the Off position 3 Restart the unit using the Start up Procedure described above 2 6 Warning Messages There are two warning messages that may appear on the LCD screen Temp WARNING and Temp Overheat Temp WARNING When the laser temperature approaches the upper limit the Temp WARNING message appears on the LCD screen to warn the user The system will continue to operate normally as long as the temperature does not exceed the limit Temp Overheat The Temp Overheat message appears on the LCD screen when the laser temperature has exceeded the upper limit The pump lasers will shutdown immediately and the system will freeze up In such case the unit should be switched off and restarted OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab The unit begins the PC connection mode when the RS232 port is connected to a PC and the control software is initi
4. Phoenix AZ 85018 Fax 602 343 1489 Optilab 2 4 3 Modulation and Bias Control cont d Examples of the LCD screens are shown below 2 4 4 Bias Control Modes There are 4 different modes of bias that can be set up in the transmitter Q Quadrature Positive The modulator is based at the Quadrature point of the Positive slope of modulator transfer function Q Quadrature Negative The modulator is based at the Quadrature point of the Negative slope of modulator transfer function OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44 Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab 2 4 4 Bias Control Modes Max Maximum The modulator is based at the Maximum point of the modulator transfer function Min Minimum The modulator is based at the Minimum point of the modulator transfer function Depending on the bias point selected the output of the transmitter Eye Diagrams can be very different The following are examples of the Eye Diagrams modulated 10Gb s File Control Setup Measure Calibrate tities Help 15 kni 2008 20 24 wi Biased Negative Quadrature File Control Setup Measure Cabrae Utiities Hep Sanz 2 7 Ey dash
5. Wod Biased Positive Quadrature OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab 2 4 4 Bias Control Modes cont d File Control Setup Measure Calbrate Ltlitles Hep 6 an 2006 20 28 Wi Biased Maximum 20 0 m div Time 20 0 ps dv Trigger Level aaa 3 rot Prosant 4 non Present Data 24 oes ne Pem Fle Control Setup Measure Calibrate Utlitles Hep 15 un 2008 20 28 wi bye Idask hode Biased Minimum 20 0 peAdy Traper Level RRA 615 mV M Data input rate 10Gb s from Agilent BERT Eye diagram measured with Agilent 86100A Digital Communication Analyzer 2 4 5 Operation Status The Operation Status Menu allows the user to read the current operational status of the laser and transmitter and configure the warning threshold levels OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 2 4 5 Operatio
6. FM Amp Sets the dithering amplitude Dither Enables Disables dithering of optical output lt lt Back gt gt Exits sub menu and returns to Main Menu OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44t Street www oequest com specifications in this document are subject to change Phoenix AZ 85018 E Fax 602 343 1489 Optilab 2 4 2 Power Control cont d Examples of the LCD screens are shown below 2 4 3 Modulation and Bias Control The Modulation amp Bias Menu allows the user to set the modulation voltage enable or disable the automatic bias control or manually set the bias voltage Parameter Function Gain Ctrl Sets gain level of RF power from RF driver amplifier into optical modulator Bias Pt Sets bias mode to Q Q Max Min ABC Reset Resets automatic bias control function ABC Status Selection of manual or automatic bias control Man Bias Sets bias voltage to optical modulator manually 0 to 15 VDC Display the bias voltage that is being applied to the optical modulator during Bias Vol Co aS Lon Automatic Bias Control mode lt lt Back gt gt Exits sub menu and returns to Main Menu OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44t Street www oequest com specifications in this document are subject to change
7. alized In this mode the parameter information of the laser continues to be displayed but there is no response to the knob button on the front panel The user can only control the unit through the control software on the PC Once the software program stops execution the unit will return to local control If the RS232 direct cable is disconnected the unit will automatically restore to local control 2 7 PC Connection Mode For detailed software control please refer to the software control user guide OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab 3 Troubleshooting Symptom Possible Cause and Solution C Laser power not turned up high enough S Select Pwr parameter in Power Control Menu and increase until the optical Output power stops changing C Optical input output connectors dirty Optical output power not high S Disable optical output and clean optical connectors enough C Optical output connector damaged S Measure optical output power with power meter and compare with readout on Main Display Return to Optilab for repair if the difference is high and cannot be corrected by cleaning the optical connectors
8. blot the surface of the optical fiber during connection 2 Cleaning the connector with dry optical tissue removes residual alcohol that may be ignited by optical emission OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489
9. is document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab 2 5 Operating Instructions cont d Verify Operation Procedure cont d 2 The bias of the modulator should be set to the Q mode A green LED should be turned on in the front panel 3 Connect the optical output to an optical power meter The output power level of the transmitter should read between 3dBm to 5dbm 4 Connect the Data input to the output of Pattern Generator The typical setting of the Pattern Generator is shown below Data Rate of 9 964 GHz Drive Voltage Vp p of 0 328 Volt and Bias Voltage of 0 127 Volt 5 Connect the optical output to an optical input of a high speed sampling scope or digital communications analyzer such as Tektronix CSA8000B or Agilent 86100B The typical Eye Diagram should be shown as below OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab 2 5 Operating Instructions cont d Patchcord Swapping Procedure 1 Select the Status parameter and change it to Disable 2 Swap patchcords as desired Only connect FC APC connectorized patchcords to the optical input output receptacles
10. n ESD sensitive device Proper procedures including equipment grounding wearing ESD straps and using ESD benches must be strictly followed Note that proper cleaning and handling for the connectors is required to keep the transmitter performing properly A built in optical isolator has been incorporated to protect the unit from optical feedback and to improve stability OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab Features 1 Nameplate 2 AC Power Socket 3 Fuse Socket 4 Main Switch 5 RS232 Female Socket LT 1550 12 5G Rear Panel Function The nameplate records the equipment s serial number The AC power socket is the input for the AC power source A three pin standard power cord should be used to connect this equipment to any 110 or 220 V main supply The fuse socket accepts a 5 x 20mm mini fuse A Quick acting fuse should be used for maximum protection The main switch is the master AC power switch for the unit including the optical output For remote control and monitoring the user can plug in the RS232 direct cable provided connecting the unit to a personal computer For the control softwa
11. n Status cont d Parameter Temp Cur Power O P Power Conf Pwr W Thres Fatal amp Warning Power Thermal Freq lt lt Back gt gt Optilab Function Displays temperature of laser Displays current of laser Displays optical output power of laser Displays optical output power of transmitter Sets optical output power warning threshold for laser Displays fatal and warning thresholds for optical output power Displays fatal threshold for laser temperature Displays fatal threshold for optical channel frequency Exits sub menu and returns to Main Menu 2 5 Operating Instructions Start up Procedure 1 Turn the main key switch clockwise to the On position to enable electrical power to the unit The power indicator will light up and the LCD display will show a logo 2 Wait for the LCD display to switch to the Main Menu screen 3 Connect the optical output receptacle using FC APC connectorized patchcords to obtain the optical output 4 Connect the Data input to the input source signal Verify Operation Procedure 1 Select the Power Control Menu and enable the laser When the laser is enabled a green LED will illuminate on the front panel OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in th
12. nd intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab 2 Operation 2 1 Introduction This section describes how to operate the LT 1550 12 5G Lightwave Transmitter and discusses the location and function of the controls and connectors 2 2 Initial Inspection When you receive the LT 1550 12 5G verify that the following items are included LT 1550 12 5G Lightwave Transmitter User s Manual RS232 Serial Direct Cable Control Software Manual Control Software CD Package AC Power Cord O 0O A WN The LT 1550 12 5G was carefully inspected before it left the manufacturer It should be in proper working order upon receipt You should however inspect the unit for any damage that may have occurred in transit If the shipping container or the packing material is damaged keep it until the contents of the shipment have been checked to be free of mechanical and electrical damages Notify Optilab LLC promptly if any notable damage is found OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Sui
13. re please refer to the control software user guide 2 4 Main Menu Screen Upon powering up the LT 1550 12 5G unit a logo lights up on the Main Display for a few seconds while the unit initializes After initialization the Main Menu screen will appear OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab There are four sub menus that can be accessed from the Main Menu page Wavelength Setting Menu Power Control Menu Modulation amp Bias Menu and Operation Status Menu Not all the sub menus are can be viewed on the Main Display at the same time To see the other sub menus turn the knob to scroll the page To enter a sub menu turn the knob until the flashing cursor is next to the name of the sub menu then press the Select button 2 4 Main Menu Screen cont d There are four major sub menus can be accessed through the front panel and control knob Wavelength Setting Menu Power Control Menu Modulator Bias Control Menu Status Menu ROD The sub menus of the LCD are shown below Within a sub menu all the parameters can be viewed by turning the knob to scroll the page up or down To change a parameter turn
14. te 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 2 3 Controls Data iy 4 4 Optilab Features 1 Main Display 2 Warning Indicators 3 Power Indicator 4 Select Button 5 Control Knob 6 Data Input SMA Connector 7 Optical Output Receptacle Optilab SAE LT TC 12 5G 2 4 eel LT 1550 12 5G Front Panel Function The LCD display shows the control parameters warning messages and control parameters of the LT 1550 12 5G unit These two indicators light up to warn when 1 The pump laser is ON and the driving value is greater than zero Enable 2 The pump laser is overheated Temp Overheat This indicator lights up when the power to the LT 1550 12 5G unit has been turned on Pressing the button selects and deselects the highlighted control parameter for modification The unit beeps once to acknowledge when the button is pressed The knob allows the user to select and modify the control parameters of the unit Turning the knob clockwise moves the selection cursor up or increases the selected parameter Turning the knob counter clockwise moves the selection cursor down or decreases the selected parameter SMA connector that accepts the up to 1 0 V peak to peak RF modulation signal with 50 Q input impedance This receptacle accepts the FC APC fiber optic connector for optical output This transmitter is a
15. the knob until the flashing cursor is next to the parameter then press the Select button 2 4 1 Wavelength Setting The Wavelength Setting Menu allows the user to select the optical output channel set the grid spacing and configure the frequency for channel 1 OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab 2 4 1 Wavelength Setting cont d Parameter Function Channel Selects optical channel of grid that appears at output of transmitter Grid Sets the grid spacing between optical channels Ch1 Freq Ctrl Sets the frequency of the first optical channel in the grid Ch Freq Value Displays frequency of optical channel currently selected lt lt Back gt gt Exits sub menu and returns to Main Menu Examples of the LCD screens are shown below 2 4 2 Power Control The Power Control Menu allows the user to set the optical output power of the transmitter enable or disable the optical output and configure the dithering function for the optical output Parameter Function Power Sets optical output power level Status Enables Disables optical output of transmitter Dither FM Freq Sets the dithering frequency Dither
16. y will be void upon any attempt to open or to fix the equipment by the user without prior approval of Optilab LLC 4 2 Service and Calibration Your LT 1550 12 5G unit has been designed to provide years of trouble free operation No internal maintenance is required provided that the equipment is properly handled operated and kept away from contamination For any questions regarding the operation and performance of the unit please contact Optilab LLC Optilab LLC 5110 N 44th Street Suite 200L Phoenix AZ 85018 USA Tel 602 343 1496 Fax 602 343 1489 Email sales oequest com OptiLab LLC undertakes continuous and intensive OptiLab LLC sales oequest com product development to ensure its products perform at 5110 N 44th Street www oequest com the highest technical standards As a result the Suite 200L Tel 602 343 1493 specifications in this document are subject to change Phoenix AZ 85018 Fax 602 343 1489 Optilab 4 3 Care of Fiber Optic Connectors Damage to fiber optic connectors account for more than 70 percent of equipment performance degradation To avoid such damage the user should follow the procedures below to keep the connectors clean 1 Clean the connector with optical tissue soaked with alcohol that is at least 90 pure 2 Clean the connector again with dry optical tissue Reasons 1 Cleaning the connector with wet optical tissue removes dust particles oil and contaminants that may damage or
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