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Finisar
Product Specification
10Gb/s 120km Telecom CMLTM Transmitter Optical Sub-Assembly (TOSA) DM80-02-0/1/2
PRODUCT FEATURES * * * * * * * * High Performance CMLTM Supports multi-bit-rate application, from 9.95Gb/s to 11.1Gb/s Supports link length up to 120km without DCM 4-7dBm modulated output power Case temperature range -5C to 75C Supports application with and without FEC TDM, DWDM single channel Covers ITU-T C- and L-band channels (1527.773nm to 1605.744nm) APPLICATIONS * * * * * Metro, Regional and Long haul DWDM application SONET/SDH OC-192, STM-64 10G Ethernet 10X Fibre Channel XFP, X2, Xenpak
Finisar's DM80-02 transmitter optical sub-assembly (TOSA) employs proprietary Chirp Managed Laser (CMLTM) technology and has been specifically designed to transmit 10Gb/s data over physical distances up to 120km. The module is comprised of a directlymodulated DFB laser chip and a co-packaged proprietary optical spectrum reshaper (OSR) passive optical element. The OSR component also provides a frequency locking function and allows operation on the ITU-T channels within 2.5GHz with coverage across both C-band and L-band for DWDM versions. Also included in this TOSA package are 2 photo-detectors for power control and wavelength locking, together with 2 TECs for temperature stabilization. The miniature size of this TOSA ensures it suitable for integration into XFP, X2, Xenpak and other transceiver modules. Key specifications for the optical and electrical characteristics, physical requirements, environmental conditions and reliability/quality requirements are detailed in this document. Note: Long version of this document with more detailed optical and electrical parameter specification is available upon request.
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I. Internal Optical Layout
Isolator PD2
L1
L2
OSR
DFB
Fibre stub
Isolator
TEC
Beamsplitter
PD1
Window
Figure 1 Figure 1. CML internal layout
The DM80-02 modules uses a 10Gb/s directly modulated DFB chip co-packaged with an optical spectral re-shaper (OSR) element as shown in Figure 1. An optical isolator is included between the DFB and the OSR while a beam-splitter component and 2 photodetectors are configured to allow frequency locking. Lens#1(L1) is used to collimate the DFB laser output and pass the beam through the splitter and OSR, prior to coupling into single-mode fiber using Lens#2 (L2). A second isolator is included in the fiber pigtail to minimize the effect of external back-reflections on module performance.
II. Control Method The schematic in Figure 2 shows the key components and control loops that are used to operate the module. The output power of the DFB is monitored by photodetector PD1. Photodetector PD2 monitors the back-reflection from the OSR. The photocurrent ratio from the two detectors is used to lock the relative spectral locations of the laser and the OSR via temperature control of the DFB using TEC#1. A second TEC (TEC#2) controls the temperature of the OSR and locates the operating point of the OSR on the ITU grid for DWDM applications.
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Constant Output Power
Constant Temperature
Modulation Current
Bias Current
Thermistor#2
Thermistor#1
DFB TEC#1
PD1
PD2
OSR TEC#2
Start Up Temperature
Constant Photodetector Ratio (locker)
Figure 2: Control schematic for DM80-02 Module
III. Absolute Maximum Ratings
Table 1: Absolute maximum ratings Item Parameters 1. Storage Temperature 2. Heat Soldering Temperature 3. Returned Fiber Power 4. Laser Forward Current 5. Laser Reverse Voltage 6. PD Forward Current 7. PD Reverse Voltage 8. TEC Current 9. TEC Voltage 10. Transient Cooler Current 11. Tolerable External Reflection 12. Optical Return Loss
Conditions on leads, 6 seconds max CW, 1 second transient Peak Peak CW CW DC DC 1 sec
Min -40
-1.9 -1.9
Max 85 260 13 200 2 1 2 1.9 1.8 1.9 -14 -27
Units C C dBm mA V mA V A V A dB dB
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IV. Standard Operating Specifications
Table 2: Standard Operating Requirements Min Item Parameters Typ Max Units Comments All the following transmission parameters are tested at 9.95 or 10.7Gb/s
1.
Bit Rate
9.953/10.7
11.1
Gb/s
2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.
Operating Case Temperature Range Wavelength (SOL) Locked deviation from ITU Modulated Output Power (EOL) Operating Drive current (SOL) Allowed Deviation from SOL drive current over life and temperature Required Resolution of Operating Drive Current SMSR Wavelength temperature tuning coefficient Wavelength current tuning coefficient Laser threshold current Forward Bias Voltage
-5 ITU-T Grid -2.5 4 70 -15
75
C GHz ITU-T wavelength grids defined in Tables 9 & 10 EOLOT SOL operation condition to be discussed.
2.5 7 100 20 0.09
GHz dBm mA % mA dB nm/C pm/m A mA V dB/Hz MHz Ohms
360mA/4096 levels
35
40 0.1 7 25 1.8 -135 2 50 10
14. RIN 15. Laser CW Linewidth (FWHM)
16. Module Input Impedance 17. Peak to Peak voltage, Vpp 1.2
0 to 10 GHz, Measured before OSR is installed Measured before OSR Recommend use of EML driver technology Into 50ohm Customer must provide adjustment capability on electrical driver BT Filter OFF BT Filter OFF tbc Before OSR Receiver threshold optimized for
1.8
2.5
V
18. Electrical input crossing Extinction Ratio (EOLOT) Optical crossing S11 S21 (3dB BW) Power dispersion Penalty @ 30dB OSNR, 9.95Gbs,
25
80
%
19. 20. 21. 22. 23.
9 tbc Mask 10 tbc
dB % dB GHz dB
2
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transmission, to be discussed Receiver threshold optimized at BB and 1600ps/nm
BER=10-12, 1600ps/nm (EOLOT)1 OSNR dispersion Penalty 24. @ BER=10-4, 10.7Gbs, 1600ps/nm (EOLOT) 1
2
dB
Note: 1. Please call Finisar to discuss the receiver configuration, including types of PIN/APD, and power level into APD, and the type of CDRs are used. 2400ps/nm transmission is possible with trade-off between back-to-back eye diagram and transmission performance; DM80-01 is also compliant with the newly accepted ITU 10Gbps 120km standard P1V1-2C2
V. Mechanical Details
Figure 3: TOSA Package Profile
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Figure 4: TOSA Package Outline Dimensions
V.1 Flex Cables and Signal Connections This TOSA has 2 flex cables. The rear flex cable has 9 connections including a high speed ground-signal-ground coplanar waveguide, located in the middle of the cable, for delivery of high speed data signals. The side flex has 4 connections for high current TEC signals.
Table 8: Signal Connection Description Pin Description 1. PD1 (-) 2. Thermistor#1 (-) 3. Common 4. RF Ground/Laser Cathode 5. RF Signal 6. RF Ground/Laser Cathode 7. Laser Anode for Bias Current 8. PD2 (-) 9. Thermistor#2 (-) 10. TEC 1 (-)
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11. 12. 13.
TEC 1 (+) TEC 2 (-) TEC 2 (+)
V.2 Connector Options LC receptable is currently. SC receptable is possible. Please contact Finisar for request. V.3 10Gb/s Signal Delivery - RF Connection The RF connection is through the ground-signal-ground coplanar structure on the rear flex cable.
VI. Wavelength Coverage
Table 4: DWDM Product Identification C-Band 100 GHz Channel Frequency Wavelength Channel ID (GHz) (nm) ID 9170 191700 1563.863 9400 9180 191800 1563.047 9410 9190 191900 1562.233 9420 9200 192000 1561.419 9430 9210 192100 1560.606 9440 9220 192200 1559.794 9450 9230 192300 1558.983 9460 9240 192400 1558.173 9470 9250 192500 1557.363 9480 9260 192600 1556.555 9490 9270 192700 1555.747 9500 9280 192800 1554.94 9510 9290 192900 1554.134 9520 9300 193000 1553.329 9530 9310 193100 1552.524 9540 9320 193200 1551.721 9550 9330 193300 1550.918 9560 9340 193400 1550.116 9570 9350 193500 1549.315 9580 9360 193600 1548.515 9590 9370 193700 1547.715 9600 9380 193800 1546.917 9610 9390 193900 1546.119 C-band Frequency (GHz) 194000 194100 194200 194300 194400 194500 194600 194700 194800 194900 195000 195100 195200 195300 195400 195500 195600 195700 195800 195900 196000 196100 Wavelength (nm) 1545.322 1544.526 1543.73 1542.936 1542.142 1541.349 1540.557 1539.766 1538.976 1538.186 1537.397 1536.609 1535.822 1535.036 1534.25 1533.465 1532.681 1531.898 1531.116 1530.334 1529.553 1528.773
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Table 5: DWDM Product Identification L-Band 100 GHz Channel Frequency Wavelength Channel ID (GHz) (nm) ID 8670 186700 1605.744 8920 8680 186800 1604.885 8930 8690 186900 1604.026 8940 8700 187000 1603.168 8950 8710 187100 1602.311 8960 8720 187200 1601.455 8970 8730 187300 1600.6 8980 8740 187400 1599.746 8990 8750 187500 1598.893 9000 8760 187600 1598.041 9010 8770 187700 1597.189 9020 8780 187800 1596.339 9030 8790 187900 1595.489 9040 8800 188000 1594.641 9050 8810 188100 1593.793 9060 8820 188200 1592.946 9070 8830 188300 1592.1 9080 8840 188400 1591.255 9090 8850 188500 1590.411 9100 8860 188600 1589.568 9110 8870 188700 1588.725 9120 8880 188800 1587.884 9130 8890 188900 1587.043 9140 8900 189000 1586.203 9150 8910 189100 1585.365 9160 L-band
Frequency (GHz) 189200 189300 189400 189500 189600 189700 189800 189900 190000 190100 190200 190300 190400 190500 190600 190700 190800 190900 19100 191100 191200 191300 191400 191500 191600
Wavelength (nm) 1584.527 1583.69 1582.854 1582.018 1581.184 1580.35 1579.518 1578.686 1577.855 1577.025 1576.196 1575.368 1574.54 1573.714 1572.888 1572.063 1571.239 1570.416 1569.594 1568.773 1567.952 1567.133 1566.314 1565.496 1564.679
VII. Quality and Reliability Lifetime The operating lifetime of the module is 15 years. The reliability target is 400 FITs mean over 15 years to include random and wear out failures, valid for high-end of case temperature range. All specifications apply over this period of time. Qualification The DM80-02 module is being qualified in accordance with the Telcordia standard GR468-CORE. The qualification report will be available upon request once the qualification test is completed.
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Electro-Static Discharge (ESD) The device meets the ESD Class 3 requirements of the Telcordia standard TR-NWT000870 Issue 1, dated February 1991. VIII. Order Information Product code For the product specified in this document, the proper product code shall be: DM80-02-1 (or, -0, -2)-xxxx-3-RC-yyyy This product code should be specified when placing a purchase order. * * "01" indicates a butterfly box module as specified in this document. "1" indicates the laser wavelength will be specified on 100GHz ITU grid as specified in Table 9 and Table 10. If -"0" is specified, it can be a TDM version with any wavelength within C or L band, but not guaranteed on ITU grids. -"2" can also be specified for 50GHz ITU grid. "xxxx" is the channel ID as specified in Table 9 and Table 10. "3" indicates modulated output power range is between 4-7dBm. Please contact Finisar if different power level is needed. "RC" indicates the optical connector type is a receptable, currently an LC receptable. If other type connector is required, please contact Finisar. "yyyy" indicates any special customized request and need to be agreed with Finisar prior to ordering
* * * *
IX. Revision History
Revision A Date 5-May-2007 * * * * * * * * * Document created. Description
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X. For More Information
Finisar Corporation 1389 Moffett Park Drive Sunnyvale, CA 94089-1133 Tel. 1-408-548-1000 Fax 1-408-541-6138 sales@finisar.com www.finisar.com
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