D2525P AGERE | Alldatasheet
Document overview
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Technical content
Features
n ITU wavelengths available from 1529.55 nm —1610.06 nm n Integrated optical isolator n High-performance, multiquantum-well (MQW), distributed-feedback (DFB) laser n Industry-standard, 14-pin butterfly package n Hermetic package n InGaAs, PIN photodetector back-facet monitor n Polarization-maintaining fiber pigtail n For use with lithium niobate modulators n High reliability n Narrow linewidth n High optical power available
Applications
n Telecommunications — SONET/SDH OC-48/STM-16, OC-192/STM-64 — Extended and ultralong reach — Undersea systems — Dense WDM systems n Digital video
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 ori- entation. 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), distributed- feedback (DFB) laser. This device nominally has an output power of 10 mW. The wavelength of the laser can be temperature-tuned for more precise wave- length selection by adjusting the temperature of the internal thermoelectric cooler.
Wavelength-Selected D2525P Data Sheet Isolated DFB Laser Module with PMF March 2000 22 Lucent Technologies Inc. (continued) Controlled Feedback The module contains an internal optical isolator that sup- presses optical feedback in laser-based, fiber-optic sys- tems. Light reflected back to the laser is attenuated a minimum of 30 dB. 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. Controlled Power An internal, InGaAs, PIN photodiode functions as the back- facet 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. 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 W impedance. The laser module is equipped with Fujikura * polarization- maintaining fiber (PMF). The fiber is PANDA type and is the same fiber that is used on Lucent Technologies Microelec- tronics Group’s lithium niobate modulators. It has a mode field diameter of 10.5 m m, a cladding diameter of 123 m 128 m m, and a loose tube jacketed fiber 900 m m in diame- ter. The pigtail is terminated with an ST 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 Telcor- dia Technologies TR-NWT -000468. All design and manu- facturing 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. Figure 1. Polarization-Maintaining Fiber
- A positive current through the thermoelectric heat pump cools the
- Both leads should be grounded for optimum performance.
Figure 2. Circuit Schematic Table 1. Pin Descriptions
1 Thermistor
2 Thermistor
3 Laser dc Bias (Cathode) (–)
4 Back-facet Monitor Anode (–)
5 Back-facet Monitor Cathode (+)
6 Thermoelectric Cooler (+)
7 Thermoelectric Cooler (–)
8 Case Ground
9 Case Ground
10 Case Ground
11 Laser Anode (+)
12 RF Laser Input Cathode (–)
13 Laser Anode (+)
14 Case Ground
periods can adversely affect device reliability.
- Does not apply to shipping container.
- All remaining connections
Reverse the order for the proper turn-off sequence. susceptibility testing and protection-design evaluation. The minimum fiber bend radius is 1.50 in.
- Place the bottom flange of the module on a flat heat
- Mount four #2-56 screws with Fillister heads
1 in.-lb. of torque to the screws. Note: Dimensions are in inches and (millimeters). Figure 3. Fillister Head ScrewParameter Value Unit
- Standard operating condition is 5.0 V reverse bias.
- Custom wavelengths available.
ferrule key is not aligned to slow axis of fiber. Connector is intended for testing purposes only. Table 2. Electrical Characteristics Table 3. Optical Characteristics (at 25 °C laser temperature)
200 MHz < f < 10 GHz
Data Sheet Wavelength-Selected D2525P March 2000 Isolated DFB Laser Module with PMF 5Lucent Technologies Inc. Outline Diagram 1-520.g 0.700 (17.78) 1.180 (29.97) HEAT SINK 0.215 (5.45) 0.056 (1.42) 0.030 (0.75) 0.575 (14.61) 2.03 (51.6) 39.37 (1000.00) MIN 0.10 (2.5) 0.260 (6.60) 0.215 (5.47) REF 0.365 (9.27) MAX 0.863 (21.91) 0.036 (0.91) PIN 1 0.078 (1.98) 0.213 (5.40) TYP 0.100 (2.54) TYP 0.105 (2.67) DIA TYP (4) PLACES 1.025 (26.04) 0.020 (0.51) TYP0.508 – 0.008 (12.90 – 0.2) STRAIN RELIEF PIN 14 0.350 (8.89) 0.500 (12.70) 0.605 (15.37) MAX TRADEMARK, CODE, LASER SERIAL NUMBER, AND DATE CODE IN APPROX. AREA SHOWN 0.200 (5.08) 0.10 – 0.002 (0.25 – 0.064)
Wavelength-Selected D2525P Data Sheet Isolated DFB Laser Module with PMF March 2000 6 Lucent Technologies Inc. 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 certi- fied with the FDA under accession number 8720010. This product complies with 21 CFR 1040.10 and 1040.11. 8 mm/123 mm—128 mm single-mode fiber with 900 mm loose-tube jacketed fiber and connector Wavelength = 1.5 mm 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 mm
Data Sheet Wavelength-Selected D2525P March 2000 Isolated DFB Laser Module with PMF 7Lucent Technologies Inc.
Ordering Information
Table 4. Ordering Information
Table 4. Ordering Information (continued)
Wavelength-Selected D2525P Data Sheet Isolated DFB Laser Module with PMF 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 © 2000 Lucent Technologies Inc. All Rights Reserved March 2000 DS00-073OPTO-1 (Replaces DS00-073OPTO)