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Data Sheet March 2000
Wavelength-Selected D2525P Isolated DFB Laser Module with PMF
Applications
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Telecommunications -- SONET/SDH OC-48/STM-16, OC-192/STM-64 -- Extended and ultralong reach -- Undersea systems -- Dense WDM systems Digital video
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Description
The D2525P family of DFB laser modules is designed to be used with a lithium niobate external modulator (see Table 4). The laser module features a polarization-maintaining fiber (PMF) pigtail, enabling it to be directly connected to a modulator without the need of a polarization controller. The PMF maintains the polarization of the output light to a consistent orientation. This allows the D2525P to be used as a CW light source for systems requiring extremely low chirp such as undersea or 10 Gbits/s systems. The module contains a multiquantum-well (MQW), distributedfeedback (DFB) laser. This device nominally has an output power of 10 mW. The wavelength of the laser can be temperature-tuned for more precise wavelength selection by adjusting the temperature of the internal thermoelectric cooler.
The 1.5 m D2525P Laser Module is available in a 14-pin, hermetic, butterfly package.
Features
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ITU wavelengths available from 1529.55 nm --1610.06 nm Integrated optical isolator High-performance, multiquantum-well (MQW), distributed-feedback (DFB) laser Industry-standard, 14-pin butterfly package Hermetic package InGaAs, PIN photodetector back-facet monitor Polarization-maintaining fiber pigtail For use with lithium niobate modulators High reliability Narrow linewidth High optical power available
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Wavelength-Selected D2525P Isolated DFB Laser Module with PMF
Data Sheet March 2000
Description (continued)
Controlled Feedback
The module contains an internal optical isolator that suppresses optical feedback in laser-based, fiber-optic systems. Light reflected back to the laser is attenuated a minimum of 30 dB.
CORE STRESS ROD
PRINCIPAL POLARIZATION AXIS CLADDING INNER COATING (SILICON & ACRYLATE) OUTER COATING (ACRYLATE OR NYLON)
1-771(C).a
Controlled Temperature
An integral thermoelectric cooler (TEC) provides stable thermal characteristics. The TEC allows for heating and cooling of the laser chip to maintain a temperature of 25 C for case temperatures from -40 C to +70 C. The laser temperature is monitored by the internal thermistor, which can be used with external circuitry to control the laser chip temperature.
Figure 1. Polarization-Maintaining Fiber
Pin Information
Table 1. Pin Descriptions
Pin Name Thermistor Thermistor Laser dc Bias (Cathode) (-) Back-facet Monitor Anode (-) Back-facet Monitor Cathode (+) Thermoelectric Cooler (+)1 Thermoelectric Cooler (-)1 Case Ground Case Ground Case Ground Laser Anode (+) 2 RF Laser Input Cathode (-) Laser Anode (+) 2 Case Ground
Controlled Power
An internal, InGaAs, PIN photodiode functions as the backfacet monitor. The photodiode monitors emission from the rear facet of the laser and, when used in conjunction with control circuitry, can control optical power launched into the fiber. Normally, this configuration is used in a feedback arrangement to maintain consistent laser output power.
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Standard Package
The laser module is fabricated in a 14-pin, hermetic, metal/ ceramic butterfly package that incorporates a bias tee that separates the dc-bias path from the RF input. The RF input has a nominal 25 impedance. The laser module is equipped with Fujikura* polarizationmaintaining fiber (PMF). The fiber is PANDA type and is the same fiber that is used on Lucent Technologies Microelectronics Group's lithium niobate modulators. It has a mode field diameter of 10.5 m, a cladding diameter of 123 m-- 128 m, and a loose tube jacketed fiber 900 m in diameter. The pigtail is terminated with an ST (R) ferrule. Figure 1 shows the orientation of polarization in the fiber. Lucent's optoelectronic components are being qualified to rigorous internal standards that are consistent with Telcordia Technologies TR-NWT-000468. All design and manufacturing operations are ISO 9001 certified. The module is being fully qualified for central office applications.
* Fujikura is a registered trademark of Fujikura Ltd. The ST ferrule key is not aligned to slow axis of fiber. Connector is intended for testing purposes only. Telcordia Technologies is a trademark of Bell Communications Research, Inc. ISO is a registered trademark of The International Organization for Standardization.
1. A positive current through the thermoelectric heat pump cools the laser. 2. Both leads should be grounded for optimum performance.
7 - 6 + 5 + 4 - L1 160 nH TEC 3 - TH 10 k 2 1
PACKAGE GROUNDS + 8 9 10 11
R1 20 - 12
ISOLATOR
+ 13 14
1-567
Top view.
Figure 2. Circuit Schematic Lucent Technologies Inc.
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Data Sheet March 2000
Wavelength-Selected D2525P Isolated DFB Laser Module with PMF
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Laser Reverse Voltage dc Forward Current Operating Case Temperature Range Storage Case Temperature Range* Photodiode Reverse Voltage Photodiode Forward Current
* Does not apply to shipping container.
Symbol VRLMAX IFLMAX TC Tstg VRPDMAX IFPDMAX
Min -- -- -40 -40 -- --
Max 2 225 70 70 10 2
Unit V mA C C V mA
Handling Precautions
Power Sequencing
To avoid the possibility of damage to the laser module from power supply switching transients, follow this turn-on sequence: 1. All ground connections 2. Most negative supply 3. Most positive supply 4. All remaining connections Reverse the order for the proper turn-off sequence.
Mounting Instructions
The minimum fiber bend radius is 1.50 in. To avoid degradation in performance, mount the module on the board as follows: 1. Place the bottom flange of the module on a flat heat sink at least 0.5 in. x 1.180 in. (12.7 mm x 30 mm) in size. The surface finish of the heat sink should be better than 32 in. (0.8 m), and the surface flatness must be better than 0.001 in. (25.4 m). Using thermal conductive grease is optional; however, thermal performance can be improved by up to 5% if conductive grease is applied between the bottom flange and the heat sink. 2. Mount four #2-56 screws with Fillister heads (M2-3 mm) at the four screw hole locations (see Outline Diagram). The Fillister head diameter must not exceed 0.140 in. (3.55 mm). Do not apply more than 1 in.-lb. of torque to the screws.
0.118 (3.00) 0.086 (2.18)
Electrostatic Discharge
CAUTION: This device is susceptible to damage as a result of electrostatic discharge. Take proper precautions during both handling and testing. Follow guidelines such as JEDEC Publication No. 108-A (Dec. 1988). Lucent employs a human-body model (HBM) for ESDsusceptibility testing and protection-design evaluation. ESD voltage thresholds are dependent on the critical parameters used to define the model. A standard HBM (resistance = 1.5 k, capacitance = 100 pF) is widely used and, therefore, can be used for comparison purposes. The HBM ESD threshold presented here was obtained using these circuit parameters: Parameter Human-body Model Lucent Technologies Inc. Value >400 Unit V
0.062 (1.58) 0.031 (0.79)
0.140 (3.56) 0.129 (3.28) R 0.041 (1.04)
Note: Dimensions are in inches and (millimeters).
1-532(C)
Figure 3. Fillister Head Screw
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Wavelength-Selected D2525P Isolated DFB Laser Module with PMF
Data Sheet March 2000
Characteristics
Table 2. Electrical Characteristics (at 25 C laser temperature) Parameter Threshold Current Drive Current Above Threshold Laser Forward Voltage Monitor Reverse-bias Voltage* Monitor Current Monitor Dark Current Input Impedance Thermistor Current Resistance Ratio Thermistor Resistance TEC Current TEC Voltage TEC Capacity Symbol ITH -- VLF VRMON IRMON ID ZIN ITC -- RTH ITEC VTEC T Test Conditions -- LF = 10 mW LF = 10 mW (CW) -- PO = 10 mW (CW) IF = 0, VRMON = 5 V -- -- -- TL = 25 C L = 25 C, TC = 70 C T TL = 25 C, TC = 70 C TC = 70 C Min -- -- -- 3 0.200 -- -- 10 9.1 9.5 -- -- 50 Typ 15 -- 1.3 5 -- 0.01 25 -- 9.6 -- -- -- -- Max 40 110 1.8 10 -- 0.1 -- 100 10.1 10.5 1.0 2.0 -- Unit mA mA V V mA A A -- k A V C
* Standard operating condition is 5.0 V reverse bias. Ratio of thermistor resistance at 0 C to thermistor resistance at 50 C.
Table 3. Optical Characteristics (at 25 C laser temperature) Parameter Peak Optical Output Power Center Wavelength* (See Table 4.) Line Width (3 dB full width) Relative Intensity Noise Side-mode Suppression Ratio Optical Isolation Optical Polarization Extinction Ratio Symbol PP C RIN SMSR -- -- Test Conditions -- TL = 25 C CW Wavelength CW, PF = 10.0 mW CW, PF = 10.0 mW, 200 MHz < f < 10 GHz CW TC = 0 C to 75 C 0 C to 75 C Min 10.0 1529.55 -- -- 33 30 20 Typ -- -- 2 -- -- -- -- Max -- 1610.06 10 -135 -- -- -- Unit mW nm MHz dB/Hz dB dB dB
* Custom wavelengths available. The ST ferrule key is not aligned to slow axis of fiber. Connector is intended for testing purposes only.
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Lucent Technologies Inc.
Data Sheet March 2000
Wavelength-Selected D2525P Isolated DFB Laser Module with PMF
Outline Diagram
Dimensions are in inches and (millimeters). Tolerances are 0.005 in. (0.127 mm).
1.025 (26.04) 0.508 0.008 (12.90 0.2) PIN 1 0.020 (0.51) TYP TRADEMARK, CODE, LASER SERIAL NUMBER, AND DATE CODE IN APPROX. AREA SHOWN STRAIN RELIEF 0.500 (12.70) 0.605 0.350 (15.37) (8.89) MAX 0.10 0.002 (0.25 0.064)
0.036 (0.91) 0.200 (5.08)
0.078 (1.98) 0.105 (2.67) DIA TYP (4) PLACES PIN 14 0.213 (5.40) TYP 0.100 (2.54) TYP
39.37 (1000.00) MIN 2.03 (51.6) 0.180 (4.56) 0.820 (20.83) 0.700 (17.78) 0.863 (21.91) 0.575 (14.61) 0.260 (6.60) 0.10 (2.5)
0.056 (1.42) 0.365 (9.27) MAX
1.180 (29.97) HEAT SINK 0.215 (5.45)
0.030 (0.75)
0.215 (5.47) REF
1-520.g
Lucent Technologies Inc.
5
Wavelength-Selected D2525P Isolated DFB Laser Module with PMF
Data Sheet March 2000
High-Power Product
Class IIIb Laser Product
FDA/CDRH Class IIIb laser product. All versions are Class IIIb laser products per CDRH, 21 CFR 1040 Laser Safety requirements. All versions are Class IIIb laser products per IEC* 60825-1:1993. The device has been certified with the FDA under accession number 8720010. This product complies with 21 CFR 1040.10 and 1040.11. 8 m/123 m--128 m single-mode fiber with 900 m loose-tube jacketed fiber and connector Wavelength = 1.5 m Maximum power = 40 mW Because of size constraints, laser safety labeling is not affixed to the module but attached to the outside of the shipping carton. Product is not shipped with power supply. Caution: Use of controls, adjustments, and procedures other than those specified herein may result in hazardous laser radiation exposure.
* IEC is a registered trademark of The International Electrotechnical Commission.
40 mW
1.5 m
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Lucent Technologies Inc.
Data Sheet March 2000
Wavelength-Selected D2525P Isolated DFB Laser Module with PMF
Ordering Information
Table 4. Ordering Information Device Code D2525P862 D2525P863 D2525P864 D2525P865 D2525P866 D2525P867 D2525P868 D2525P869 D2525P870 D2525P871 D2525P872 D2525P873 D2525P874 D2525P875 D2525P876 D2525P877 D2525P878 D2525P879 D2525P880 D2525P881 D2525P882 D2525P883 D2525P884 D2525P885 D2525P886 D2525P887 D2525P888 D2525P889 D2525P890 D2525P891 D2525P892 D2525P893 D2525P894 D2525P895 D2525P896 D2525P897 D2525P898 D2525P899 Comcode 108575085 108575093 108575119 108575127 108575135 108575143 108575150 108575168 108575184 108476227 108476235 108476243 108476250 108476268 108476276 108476284 108476292 108476300 108476318 108476326 108476334 108476342 108476359 108476367 108476375 108476383 108476391 108476409 108476417 108476425 108476433 108476441 108476458 108476516 108476524 108476540 108476557 108476573 ITU Frequency 186.2 186.3 186.4 186.5 186.6 186.7 186.8 186.9 187.0 187.1 187.2 187.3 187.4 187.5 187.6 187.7 187.8 187.9 188.0 188.1 188.2 188.3 188.4 188.5 188.6 188.7 188.8 188.9 189.0 189.1 189.2 189.3 189.4 189.5 189.6 189.7 189.8 189.9 Wavelength 1610.06 1609.19 1608.33 1607.47 1606.60 1605.74 1604.88 1604.33 1603.17 1602.31 1601.45 1600.60 1599.75 1598.89 1598.04 1597.19 1596.34 1595.49 1594.64 1593.79 1592.95 1592.10 1591.25 1590.41 1589.57 1588.72 1587.88 1587.04 1586.20 1585.36 1584.53 1583.69 1582.85 1582.02 1581.18 1580.35 1579.52 1578.69 Tolerance 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm
Lucent Technologies Inc.
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Wavelength-Selected D2525P Isolated DFB Laser Module with PMF
Data Sheet March 2000
Ordering Information (continued)
Table 4. Ordering Information (continued) Device Code D2525P900 D2525P901 D2525P902 D2525P903 D2525P904 D2525P905 D2525P906 D2525P907 D2525P908 D2525P909 D2525P910 D2525P911 D2525P912 D2525P913 D2525P914 D2525P915 D2525P916 D2525P17 D2525P18 D2525P19 D2525P20 D2525P21 D2525P22 D2525P23 D2525P24 D2525P25 D2525P26 D2525P27 D2525P28 D2525P29 D2525P30 D2525P31 D2525P32 D2525P33 D2525P34 D2525P35 D2525P36 D2525P37 D2525P38 D2525P39 Comcode 108476581 108476599 108476615 108476623 108476631 108476649 108476656 108476664 108476672 108476680 108476698 108476706 108476714 108476722 108476730 108512534 108512542 108196098 108196106 108002452 108002460 108002478 108002486 108002494 108002502 108002510 108002528 108002536 108002544 108002551 108002569 108002577 108002585 108002593 108002601 108003039 108003047 108003054 108003062 108003070 ITU Frequency 190.0 190.1 190.2 190.3 190.4 190.5 190.6 190.7 190.8 190.9 191.0 191.1 191.2 191.3 191.4 191.5 191.6 191.7 191.8 191.9 192.0 192.1 192.2 192.3 192.4 192.5 192.6 192.7 192.8 192.9 193.0 193.1 193.2 193.3 193.4 193.5 193.6 193.7 193.8 193.9 Wavelength 1577.85 1577.02 1576.20 1575.37 1574.54 1573.71 1572.89 1572.06 1571.24 1570.42 1569.59 1568.77 1567.95 1567.13 1566.31 1565.50 1564.68 1563.86 1563.05 1562.23 1561.42 1560.61 1559.79 1558.98 1558.17 1557.36 1556.55 1555.75 1554.94 1554.13 1553.33 1552.52 1551.72 1550.92 1550.12 1549.32 1548.51 1547.72 1546.92 1546.12 Tolerance 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm
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Lucent Technologies Inc.
Data Sheet March 2000
Wavelength-Selected D2525P Isolated DFB Laser Module with PMF
Ordering Information (continued)
Table 4. Ordering Information (continued) Device Code D2525P40 D2525P41 D2525P42 D2525P43 D2525P44 D2525P45 D2525P46 D2525P47 D2525P48 D2525P49 D2525P50 D2525P51 D2525P52 D2525P53 D2525P54 D2525P55 D2525P56 D2525P57 D2525P58 D2525P59 D2525P60 Comcode 108003088 108003096 108003104 108003112 108003120 108003138 108003146 108003153 108003161 108003179 108003187 108003195 108003203 108003211 108003229 108003237 108003245 108196114 108196122 108196130 108196148 ITU Frequency 194.0 194.1 194.2 194.3 194.4 194.5 194.6 194.7 194.8 194.9 195.0 195.1 195.2 195.3 195.4 195.5 195.6 195.7 195.8 195.9 196.0 Wavelength 1545.32 1544.53 1543.73 1542.94 1542.14 1541.35 1540.56 1539.77 1538.98 1538.19 1537.40 1536.61 1535.82 1535.04 1534.25 1533.47 1532.68 1531.90 1531.12 1530.33 1529.55 Tolerance 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm 0.4 nm
Lucent Technologies Inc.
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Wavelength-Selected D2525P Isolated DFB Laser Module with PMF
Data Sheet March 2000
For additional information, contact your Microelectronics Group Account Manager or the following: INTERNET: http://www.lucent.com/micro, or for Optoelectronics information, http://www.lucent.com/micro/opto E-MAIL: docmaster@micro.lucent.com N. AMERICA: Microelectronics Group, Lucent Technologies Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18103 1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106) ASIA PACIFIC: Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256 Tel. (65) 778 8833, FAX (65) 777 7495 CHINA: Microelectronics Group, Lucent Technologies (China) Co., Ltd., A-F2, 23/F, Zao Fong Universe Building, 1800 Zhong Shan Xi Road, Shanghai 200233 P. R. China Tel. (86) 21 6440 0468, ext. 316, FAX (86) 21 6440 0652 JAPAN: Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700 EUROPE: Data Requests: MICROELECTRONICS GROUP DATALINE: Tel. (44) 7000 582 368, FAX (44) 1189 328 148 Technical Inquiries: OPTOELECTRONICS MARKETING: (44) 1344 865 900 (Ascot UK)
Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. ST is a registered trademark of Lucent Technologies Inc.
Copyright (c) 2000 Lucent Technologies Inc. All Rights Reserved
March 2000 DS00-073OPTO-1 (Replaces DS00-073OPTO)

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