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Part: D374
Category:
Optoelectronics
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Description: 2.5 Gbits/s Digital Uncooled Laser Module
Company: Agere Systems
Datasheet: Download D374 datasheet File size : 258 kB
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Data Sheet December 2000
D374-Type Digital Uncooled 2.5 Gbits/s Laser Module
Applications
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Short-reach SONET OC-48 systems SDH STM-16 systems Telecommunications Secure digital data systems
Benefits
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Easily board mounted Gull wing leads No additional heat sinks required
The low-profile D374-Type Laser Module is ideally suited for short- and long-reach SONET and other high-speed digital applications.
Description
The D374-Type Uncooled Laser Module consists of a laser diode coupled to a single-mode fiber pigtail. The device is available in a standard, 8-pin configuration (see Figure 1 and/or Table 1) and is ideal for short-reach and other high-speed digital applications. It is developed specifically for 2.5 Gbits/s applications. The module includes a multiquantum-well FabryPerot (MQW F-P) laser and an InGaAs PIN photodiode back-facet monitor in an epoxy-free, hermetically sealed package.
Features
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2.5 Gbits/s operation Eight-pin package suitable for SONET/SDH applications MQW F-P 1.3 µm laser with single-mode fiber pigtail Wide operating temperature range: 40 °C to +85 °C No TEC required 25 input impedance High output power: typically 1.0 mW peak power coupled into single-mode fiber; 0.2 mW versions available Hermetically sealed active components Internal back-facet monitor Qualification program: Telcordia Technologies * TA983
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* Telcordia Technologies is a registered trademark of Telcordia Technologies, Inc.
D374-Type Digital Uncooled 2.5 Gbits/s Laser Module
Data Sheet December 2000
Description (continued)
The device characteristics listed in this document are met at 1.0 mW output power. Higher- or lower-power operation is possible. Under conditions of a fixed photodiode current, the change in optical output is typically ±0.5 dB over an operating temperature range of 40 °C to +85 °C. This device incorporates the new Laser 2000 manufacturing process developed by the Optoelectronic unit of Agere Systems Inc. Laser 2000 is a low-cost platform that targets high-volume manufacturing and tight product distributions on all optical subassemblies. This platform incorporates an advanced optical design that is produced on a highly automated production line. The Laser 2000 platform is qualified for the central office
and uncontrolled environments, and can be used for applications requiring high performance and low cost. Table 1. Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 Connection NC/reser ved Case ground NC/reser ved PD cathode PD anode Laser diode anode (+) Laser RF input cathode (), 25 Laser diode anode (+)
4
3
2
1
5
6
7
8
1-900
Figure 1. D374-Type Digital Uncooled 2.5 Gbits/s Laser Module Schematic, Top View
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 Maximum Peak Laser Drive Current or Maximum Fiber Power* Peak Reverse Laser Voltage: Laser Monitor Monitor Forward Current Operating Case Temperature Range Storage Case Temperature Range Lead Soldering Temperature/Time Relative Humidity (noncondensing)
* Rating varies with temperature.
Symbol IOP PMAX VRL VRD IFD TC Tstg -- RH
Min -- -- -- -- -- 40 40 -- --
Max 150 10 2 20 2 85 85 260/10 85
Unit mA mW V V mA °C °C °C/s %
2
Agere Systems Inc.
Data Sheet December 2000
D374-Type Digital Uncooled 2.5 Gbits/s Laser Module
Handling Precautions
Caution: This device is susceptible to damage as a result of electrostatic discharge (ESD). Take proper precautions during both handling and testing. Follow guidelines such as JEDEC Publication No. 108A (Dec. 1988). Although protection circuitry is designed into the device, take proper precautions to avoid exposure to ESD.
Electrical/Optical Characteristics
Table 2. Electrical/Optical Characteristics (over operating temperature range unless otherwise noted) Parameter Operating Temperature Range Optical Output Power* Threshold Current Modulation Current Symbol T PF ITH IMOD Test Conditions -- CW, nominal T = 25 °C T = full range CW, PF = 1.0 mW, T = 25 °C CW, IMON = constant, T = full range CW, PF = 1.0 mW, T = 25 °C PF = 1.0 mW, CW PF = 1.0 mW, 155 Mbits/s IMON = constant, CW I = (0.9) ITH 10%--90% pulse T = 25 °C At bias coil -- VR = 5 V VR = 5 V -- Min 40 -- 4.5 1 10 8 50 1270 -- -- -- -- -- -- 150 -- -- Typ -- 1 9 -- 15 -- 75 -- 2 0.5 -- 0.125 1.1 25 -- 10 0.4 Max 85 -- 15 45 20 35 100 1350 3 ±1 50 0.150 1.6 -- 750 200 0.5 Unit °C mW mA mA mA mA µW/mA nm nm dB µW ns V µA nA nm/°C
Slope Efficiency Center Wavelength RMS Spectral Width Tracking Error Spontaneous Emission Rise/Fall Times Forward Voltage Input Impedance Monitor Current Monitor Dark Current Wavelength Temperature Coefficient
SE C TE PTH tR, tF VF R IMON ID --
* Higher and lower powers available. See Table 4 for more information. The slope efficiency is used to calculate the modulation current for a desired output power. This modulation current plus the threshold current comprise the total operating current for the device. VR = reverse voltage.
Agere Systems Inc.
3
D374-Type Digital Uncooled 2.5 Gbits/s Laser Module
Data Sheet December 2000
Characteristic Curve
3.0 2500
L/I CURVE LASER POWER (mW)
2000
1500
1.0
FORWARD LASER VOLTAGE
1000
MONITOR DIODE CURRENT
500
0 0 25 50 75 100 TEMP = 25 oC 125 150
0
LASER CURRENT (mA)
VOLTAGE (mV) VOLTAGE (mV) CURRENNT (µA) CURRET (µA)
2.0
1-884 (C)
Figure 2. Typical D374-Type Laser Module L/I Curve
Qualification Information
The D374-Type Laser Module has completed and passed the following qualification tests and meets the intent of Telcordia Technologies TR-NWT-000468 for interoffice environments and TA-TSY-000983 for outside plant environments. Table 3. D374-Type Laser Module Qualification Test Plan Qualification Test Mechanical Shock Vibration Solderability Thermal Shock Fiber Pull Accelerated (biased) Aging High-temperature Storage Temperature Cycling Cyclic Moisture Resistance Damp Heat Internal Moisture Flammability ESD Threshold Conditions 500 G 20 g, 20 Hz--2,000 Hz -- Delta T = 100 °C 1 kg; 3 times 85 °C, 5,000 hrs. 85 °C, 2,000 hrs. 500 cycles 10 cycles 40 °C, 95% RH, 1344 hrs. <5,000 ppm water vapor -- -- Sample Size 11 11 11 11 11 25 11 11 11 11 11 -- 6 Reference MIL-STD-883, Method 2002 MIL-STD-883, Method 2007 MIL-STD-883, Method 2007 MIL-STD-883, Method 2003 Bellcore 983
Telcordia Technologies 983, Section 5.18 Telcordia Technologies 983 Telcordia Technologies 983, Section 5.20 Telcordia Technologies 983, Section 5.23
MIL-STD-202, Method 103 MIL-STD-883, Method 1018 TR357, Section 4.4.2.5
Telcordia Technologies 983, Section 5.22
Agere Systems Inc.
4
Data Sheet December 2000
D374-Type Digital Uncooled 2.5 Gbits/s Laser Module
Outline Diagram
Dimensions are in inches and (millimeters).
0.300 (7.62) 0.100 (2.54) TRADEMARK, CODE, LASER SERIAL NUMBER, AND/OR DATE CODE IN APPROXIMATE AREA SHOWN
0.169 (4.30)
0.29 (7.37)
0.169 (4.30)
1.06 (27.0) MIN 0.52 (13.21) 39.37 (1000) MIN (PIGTAIL LENGTH)
0.045 (1.143) 0.20 (5.00)
0.02 (0.50)
0.17 (4.32)
1.925.e
Agere Systems Inc.
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