DWDM-40C User manual
Contents
1. The equipment will meet the guaranteed performance specification under the following environmental conditions Operating room temperature range 0 C to 40 C Operating relative humidity range lt 90 non condensing 2 The equipment will operate without damage under the following environmental conditions Temperature range 5 C to 50 C Relative humidity range lt 95 non condensing 3 Electromagnetic compatibility conditions Emissions EN 55103 1 Directive 89 336 EEC Immunity EN 55103 2 Directive 89 336 EEC Electrical safety EN 60 950 With reference to the declaration of conformity provided with the external power supply nevion com 12 DWDM 40C Rev A Product Warranty The warranty terms and conditions for the product s covered by this manual follow the General Sales Conditions by Nevion which are available on the company web site www nevion com nevion com 13 DWDM 40C Rev A Appendix A Materials declaration and recycling information A 1 Materials declaration For product sold into China after 1st March 2007 we comply with the Administrative Measure on the Control of Pollution by Electronic Information Products In the first stage of this legislation content of six hazardous materials has to be declared The table below shows the required information Toxic or hazardous substances and elements REE in R AKER 3 RDA SKE Part Name Lead Mercury Cadmium Hexavalent P2. NG GLASSES OR EYE LOUPES TO LOOK INTO A FIBER END USE LASER SAFETY EYEWEAR BLOCKING LIGHT AT 1310 nm AND AT 1550 nm Instruments exist to verify light output power Power meters R cards etc The FR 2RU 10 2 is classified as Class 1 laser product according to EN 60 825 1 94 A11 96 and CFR Ch1 1997 Part 1040 10 If the front panel is removed the FR 2RU 10 2 is classified as Class 1 laser product according to EN 60 825 1 94 A11 96 and class Illb according to CFR Ch1 1997 Part 1040 10 Maximum output power after multiplexing in DWDM 40C 30mW Operating wavelengths 1550 20nm INVISIBLE CLASS PRODUCT REF FDA CFR Ch 1 4 1 97 Ed 1040 10 4 3 Connector cleaning Optical connectors should be kept clean at all times Whenever a connector is disconnected the enclosed protective dust cap should be put on This protects the ferrule used for fiber alignment and prevents the surface from being scratched or damaged nevion com 9 DWDM 40C Rev A SC PC connector protective cap ferrule ot optical fiber plastic housing protective PANG blue blue Figure 1 1 The different parts of an SC PC connector Cleaning procedure If the ferrule is dirty it must be cleaned before re connection If a clean connector is pressed against a dirty connector both connectors will become dirty resulting in possible degradation of signal quality Or even worse you may damage the surface of the connector s We recommend th
3. at the cleaning procedure is done by using a special cleaning tape suitable for this purpose called CleTop see picture below 4 4 Power dissipation in the DWDM system Due to the need of very stable laser emission wavelengths a precise temperature control of the laser cavity is needed The laser wavelength will drift with changing temperature if the laser is not controlled This means that the internal temperature of the laser must be kept at a constant level for all operation temperatures This is done through the use of a Peltier element placed within the laser package The function of the Peltier element is to control the temperature in a similar way as a refrigerator If the ambient temperature increases the Peltier element will cool the inside of the laser package to keep the temperature at a constant level If the opposite is the case and the ambient temperature decreases the Peltier element will heat the inside of the package to keep the internal temperature constant The quantity of heat absorbed or produced is proportional to the current flowing through the contact In practical terms this means that the nevion com 10 DWDM 40C Rev A current is proportional to the temperature difference between the ambient temperature and the desired temperature within the laser package If the ambient temperature is lower than the package temperature the power dissipated will support the heating process of the device by increasing the ambi
4. eans that there can theoretically be about 3dB difference in attenuation between two different channels 1 5dB variance across the band after multiplexing When using erbium doped fiber optical amplifiers EDFA this can lead to large differences in signal strength between different channels at the receiving end The reason is that EDFAs also have a variance in gain across the wavelength band Therefore a special uniform loss version suffix U is available as an option EDFAs used with DWDM 40C should have a gain flattening filter and operate close to nominal gain input power When operating over or under nominal gain the EDFAs gain variance changes drastically The minimum headroom that needs to be considered when designing a system increases for each EDFA because of the gain variance across wavelengths nevion com 7 DWDM 40C Rev A 4 Operation 4 1 Handling of optical fibers This product includes fiber optic equipment Access to the optical signal path is given through the optical connectors see separate chapter Even though a fiber optic cable can look almost the same as an electrical wire special care must be taken Inside the cable is a fiber made of glass Glass has very different physical properties than the copper used in electrical wires In practical terms this means that these precautions must be taken e Do not bend the fiber too much e Do not put anything on top of the optical fiber e Keep the connectors clean
5. ent temperature On the other hand if the ambient temperature is much higher than the desired package temperature about 22 C it may cause the laser to malfunction The current which is proportional to the temperature difference implies power dissipation and an increase of the ambient temperature This increased ambient temperature will again increase the current through the Peltier element in order to lower the internal package temperature The increased current will make more power dissipate thereby increasing the ambient temperature and so on To avoid this proper ventilation of the DWDM system is needed A 40 channel system needs 12RU 26ru of rack space Additional rack space needed for ventilation is 1RU above and below each set of 4 flashlink frames 8RU Receiver cards generate less heat than transmitter cards and bidirectional cards decrease the number of cards in a 40 channel system Please consult with Network Electronics before building a 40 channel system Example with 6 flashlink frames frame space utilisation depending on card types 1RU Fan hot air exhaust 6RU 3x flashlink DWDM frames 1RU Cold air intake 2RU flashlink DWDM filter frame 1RU Fan hot air exhaust 6RU 3x flashlink DWDM frames 1RU Cold air intake The operational temperature for the DWDM system is 0 40 C nevion com 11 DWDM 40C Rev A General environmental requirements for Nevion equipment 1
6. from dust If a fiber is bent to much parts of the transmitted light is lost or in worst case the glass is broken All the datasheets of optical fibers have a point called minimum bend radius This means that any bending of the fiber corresponding to a bend radius less than the given value will make the light leak out of the fiber A typical value is 20 mm to 40 mm Telcordia standard for single mode fibers You should also avoid putting any heavy items on top of the optical fibers because this will change the optical properties of the fiber and contribute to errors in the transmitted signal Unless the fiber is damaged it will regain its optical properties after a bend is straightened out or the items are removed the squeeze is released 4 2 Laser safety precautions Guidelines to limit hazards from laser exposure All the available EO units in the flashlink range include a laser Therefore this note on laser safety should be read thoroughly The lasers emit light at wavelengths around 1550 nm This means that the human eye cannot see the beam and the blink reflex cannot protect the eye The human eye can see light between 400 nm to 700 nm nevion com 8 DWDM 40C Rev A A laser beam can be harmful to the human eye depending on laser power and exposure time therefore I BE CAREFUL WHEN CONNECTING DISCONNECTING FIBER PIGTAILS ENDS NEVER LOOK DIRECTLY INTO THE END OF THE FIBER NEVER USE MICROSCOPES MAGNIFYI
7. hal ie EE AER E E REE Sal SAR eee r de NERE 8 4 1 Handling of optical A nerne 8 4 2 kasersafety precautions iensor a citas 8 4 3 Connector CIleQNiNO seseeeessorerrrrsrernnnrernrrrrrrnn ner rrr rr eran nn r rr rr RR RARE R reg 9 4 4 Power dissipation in the DWDM system smussmrerrrssrrsssrrerrrrsrrrsnnrrrrrrrrrrr ner r rr rr rr RR rnen 10 General environmental requirements for Nevion eQUiPMENt sssssessrrrrsrrrsserrrrrrrrrrrnnnrnrrrr rn rna nt 12 Appendix A Materials declaration and recycling information smes sssssrrssrrsssrrrrrrrsrrrsnnrrrrrn nn cnn 14 AA Materials declaratio Nunnan AA eS 14 A 2 Recycling INOMMALON A AA 14 nevion com 3 DWDM 40C Rev A 1 Product overview The Flashlink DWDM 40C is a set of optical modules for multiplexing and demultiplexing 100GHz spaced DWDM Dense Wavelength Division Multiplexed signals The modules are bidirectional so they work as both multiplexer and demultiplexer at the same time A DWDM 40C consists of one DWDM 40C A and one DWDM 40C B which when used together provide an optimal link loss by stepping the insertion loss profiles in one end point complementary to the other 40 independent channels Ch 20 Ch 20 Ch 59 Ch 59 optical fibre Figure 1 DWDM 40C block diagram nevion com 4 DWDM 40C Rev A 2 Specifications 2 1 Optical specifications for 40 channel system Number of channels 40 Available wavelengths See section 0 Connector SC UPC Insertion loss per ma
8. lashlink 40 channel DWDM optical filter frame Each optical port supports a dedicated wavelength that is marked on the sub rack frame The connector is an SC PC connector Each port should be connected to the corresponding wavelength for each channel card with an optical patch cord The common port supports all wavelengths in either direction and should therefore be connected to the single fiber between the two locations where the flashlink 40 channel DWDM system is installed The optical filters are sold in pairs using cascaded thin film filters for wavelength selection This means that the filters are mounted in opposite orders on the two sides Those wavelengths which have lower attenuation in one end point have higher attenuation in the other end point thus ensuring all channels have the same link loss The specification of the optical filters can be found in chapter 2 One side is marked DWDM 40C A the other is marked DWDM 40C B o o o o Oo Waiwork DWDM 4 C A CE are O o o Oo Figure 3 1 The backplane for the 40 channel DWDM system optical filter endpoint A 3 2 System design The maximum insertion loss for any channel in end point A is 4 0dB but the same channel in the complementary end point B will then have a maximum insertion loss of 1 5dB Likewise the channel with maximum allowed insertion loss of 1 5dB in endpoint A will have a maximum insertion loss of 4 0dB in end point B This m
9. nevicn DWDM 40C 40 ch 100GHz Dense Wavelength Division Multiplexing System User manual Rev A Nevion nevion com DWDM 40C Rev A Nevion Support Nevion Europe Nevion USA P O Box 1020 1600 Emerson Avenue 3204 Sandefjord Norway Oxnard CA 93033 USA Support phone 1 47 33 48 99 97 Toll free North America 866 515 0811 Support phone 2 47 90 60 99 99 Outside North America 1 805 247 8560 E mail support nevion com See http www nevion com support for service hours for customer support globally Revision history Current revision of this document is the uppermost in the table below Rev Repl Date Sign Change description A 0 2015 06 10 MB Template update Appendix A added 0 2007 11 20 OEH New manual released nevion com 2 DWDM 40C Rev A Contents PROVISION IS o da 2 T PrOGuCt OVETVIGW css ii ic 4 A 0s cet tarts enge MADE a iets co eal tena ala tant coe oad 5 2 1 Optical specifications for 40 channel system oooooccccnononocaccnonocononnnnnnnncnnnnnnnnnnnenoncccnnnnnns 5 2 2 Wavelength Chart according to ITU T G 694 1 mnssmnsssrrssssssererrrrsrrrssnrrerrrnrrrrnn nr rr rr rr rr rna rr rn nn 6 Y GONNEGUONS retar cal 7 3 1 Connecting to the DWDM 40C sbrssrrrssssssersrrrrssrsssnrrrrrrsrrran rr rr rr rr rr rn rr rr KKR RR RR RR RR KRKA RR RR rn nen 7 3 2 SYSTEM SSI atric Reset catia tear atl cee nn Me de e lt et ed sogn 7 40 DEF atom tbe
10. olybrominated Polybrominated Pb Hg Cd Chromium biphenyls diphenyl ethers Cr VI PBB PBDE DWDM 40C O O O O O O O Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for this part is below the limit requirement in SJ T11363 2006 X Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials used for this part is above the limit requirement in SJ T11363 2006 This is indicated by the product marking A 2 Recycling information Nevion provides assistance to customers and recyclers through our web site http www nevion com Please contact Nevion s Customer Support for assistance with recycling if this site does not show the information you require Where it is not possible to return the product to Nevion or its agents for recycling the following general information may be of assistance Before attempting disassembly ensure the product is completely disconnected from power and signal connections All major parts are marked or labeled to show their material content Depending on the date of manufacture this product may contain lead in solder Some circuit boards may contain battery backed memory devices nevion com 14
11. tched pair including eet ee p 6dB max Channel Spacing 100GHz Passband ITU 12 5GHz Adjacent Channel Isolation 25dB min 28dB typ Non Adjacent Channel Isolation 40dB min Directivity 45dB min Thermal Wavelength Stability 1 0 pm Cmax Return loss 45dB min PDL 0 25dB max Operating Temperature 0 40 C Storage Temperature 40 85 C Optical Power 300mW max nevion com 5 DWDM 40C 2 2 Wavelength Chart according to ITU T G 694 1 Rev A The following wavelengths channels are in use for the 40 channel system DWDM 40C ITU Channel Frequency Wavelength a THz nm 195 90 195 80 195 70 195 60 195 50 195 40 195 30 195 20 195 10 195 00 194 90 194 80 194 70 194 60 194 50 194 40 194 30 194 20 194 10 194 00 193 90 193 80 193 70 193 60 193 50 193 40 193 30 193 20 193 10 193 00 192 90 192 80 192 70 192 60 192 50 192 40 192 30 192 20 192 10 192 00 IEEE 1531 12 1531 90 1532 68 1533 47 1534 25 1535 04 1535 82 1536 61 1537 40 1538 19 1538 98 1539 77 1540 56 1541 35 1542 14 1542 94 1543 73 1544 53 1545 32 1546 12 1546 92 1547 72 1548 51 1549 32 1550 12 1550 92 1551 2 1552 92 1553 33 1554 13 1554 94 1555 5 1596 55 1557 36 1558 17 1558 98 1559 9 1560 61 1561 41 Blue wavelengths Red wavelengths nevion com 6 DWDM 40C Rev A 3 Connections 3 1 Connecting to the DWDM 40C Figure 2 11 shows the backplane for the f
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