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Part: D372-21SS
Category:
Description: Digital Uncooled DFB Laser Module For 2.2 Gbits/s Applications. Connector FC-APC. Pfiber 2.0 MW
Company: Agere Systems
Datasheet: Download D372-21SS datasheet File size : 258 kB
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Data Sheet December 2000
D372-Type Digital Uncooled DFB Laser Module for 2.5 Gbits/s Applications
Applications
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SONET OC-48/STM-16 systems Telecommunications Secure digital data systems
Benefits
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Easily board mounted Gull wing leads No additional heat sinks required Low-cost alternative to industry-standard, 14-pin isolated laser module (ILM) Highly efficient DFB-MQW laser structure allows for lower threshold and drive currents, and reduced power consumption
The low-profile D372-Type Laser Module is ideally suited for OC-48 SONET and other high-speed digital applications.
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Features
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8-pin package suitable for SONET applications Narrow linewidth, distributed feedback, multiquantum-well (DFB-MQW)1.3 µm laser with singlemode fiber pigtail Choice of wide operating temperature ranges: 40 °C to +85 °C or 0 °C to +85 °C No TEC required High output power: typical 2.0 mW peak power coupled into single-mode fiber Hermetically sealed active components Internal back-facet monitor Built-in thermistor and bias T 25 input impedance Internal isolator Qualification program: Telcordia Technologies * TA-983
Description
The D372-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 long-reach (SONET) and other high-speed digital applications. The module includes a narrow linewidth (<1 nm), DFB-MQW single-mode laser and an InGaAs PIN photodiode back-facet monitor in a hermetically sealed package. This package is optimized for a 25 input impedance and allows for dc biasing through an internal bias T. A thermistor has been included for feedback to board-level bias circuitry, if needed.
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* Telcordia Technologies is a registered trademark of Telcordia Technologies, Inc.
D372-Type Digital Uncooled DFB Laser Module for 2.5 Gbits/s Applications
Data Sheet December 2000
Table 1. Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 Connection Thermistor Thermistor, package GND Laser dc bias cathode () choke Photodiode cathode Photodiode anode Laser diode anode (+) Laser RF input cathode () 25 Laser diode anode (+)
Description (continued)
The device characteristics listed in this document are met at 2.0 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 from the Optoelectronic Products unit of Agere Systems Inc.. Laser 2000 is a low-cost platform that targets high-volume manufacturing and tighter product distributions on all optical subassemblies. This platform incorporates an advanced optical design that is produced on one of the highly automated production lines at the Opotelectronic manufacturing facility. 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.
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Figure 1. D372-Type Digital Uncooled DFB Mini 8-Pin 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 %
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Agere Systems Inc.
Data Sheet December 2000
D372-Type Digital Uncooled DFB Laser Module for 2.5 Gbits/s Applications
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. 108-A (Dec. 1988). Although protection circuitry is designed into the device, take proper precautions to avoid exposure to ESD.
Electrical/Optical Characteristics
Table 2. D372-20 Electrical/Optical Characteristics (over operating temperature range unless otherwise noted) Parameter Operating Temperature Range Optical Output Power Threshold Current Modulation Current Slope Efficiency* Center Wavelength Spectral Width (20 dB) Side-mode Suppression Ratio Tracking Error Spontaneous Emission Rise/Fall Times Dispersion Penalty Optical Return Loss Forward Voltage Input Impedance Monitor Current Monitor Dark Current Wavelength Temperature Coefficient Symbol T PF ITH IMOD SE C SMSR TE PTH tR, tF DP ORL VF R IMON ID -- Test Conditions -- CW, peak T = 25 °C T = full range CW, PF = 2.0 mW, T = 25 °C CW, IMON = const.,T = full range CW, PF = 2.0 mW, T = 25 °C PF = 2.0 mW, CW PF = 2.0 mW CW, PF = 2.0 mW IMON = constant, CW I = (0.9) ITH 10%--90% pulse, T = 25 °C <60 km, 256 ps/nm CW At bias coil -- VR = 5 V VR = 5 V -- Min 40 -- 5 2 13 7.5 61 1280 -- 30 -- -- -- -- 18 -- -- 100 -- -- Typ -- 2 11 -- 20 -- -- -- -- 40 0.5 -- 0.125 -- -- 1.1 25 -- 10 0.09 Max 85 -- 15 50 33 55 154 1335 1 -- 1.25 50 0.150 1.0 -- 1.6 -- 1000 200 0.1 Unit °C mW mA mA mA µW/mA nm nm dB dB µW ns dB dB V µA nA nm/°C
* 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. Corrected for electrical pulse fall time. VR = reverse voltage.
Agere Systems Inc.
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D372-Type Digital Uncooled DFB Laser Module for 2.5 Gbits/s Applications
Data Sheet December 2000
Electrical/Optical Characteristics (continued)
Table 3. D372-21 Electrical/Optical Characteristics (over operating temperature range unless otherwise noted) Parameter Operating Temperature Range Optical Output Power Threshold Current Modulation Current Slope Efficiency* Center Wavelength Spectral Width (20 dB) Side-mode Suppression Ratio Tracking Error Spontaneous Emission Rise/Fall Times Dispersion Penalty Optical Return Loss Forward Voltage Input Impedance Monitor Current Monitor Dark Current Wavelength Temperature Coefficient Symbol T PF ITH IMOD SE C SMSR TE PTH tR, tF DP ORL VF R IMON ID -- Test Conditions -- CW, peak T = 25 °C T = full range CW, PF = 2.0 mW, T = 25 °C CW, IMON = const.,T = full range CW, PF = 2.0 mW, T = 25 °C PF = 2.0 mW, CW PF = 2.0 mW CW, PF = 2.0 mW (See Reliability Information, below) IMON = constant, CW I = (0.9) ITH 10%--90% pulse, T = 25 °C <60 km, 256 ps/nm (See Reliability Information, below) CW At bias coil -- =5V VR VR = 5 V -- Min 0 -- 5 2 13 7.5 61 1280 -- 30 -- -- -- -- 18 -- -- 100 -- -- Typ -- 2 11 -- 20 -- -- -- -- -- 0.5 -- 0.125 -- -- 1.1 25 -- 10 0.09 Max 85 -- 15 50 33 55 154 1335 1 -- 1.25 50 0.150 1.0 -- 1.6 -- 1000 200 0.1 Unit °C mW mA mA mA µW/mA nm nm dB dB µW ns dB dB V µA nA nm/°C
* 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. Corrected for electrical pulse fall time. VR = reverse voltage.
Reliability Information
Note, the D372-21 product does not undergo any routine dynamic testing. A 2000-piece sample was tested at 2.5 Gbits/s for SMSR at 0 °C. In that sample, 99.5% of the devices had SMSR values greater than 30 dB. Within the failures, 90% were for inability to achieve an extinction ration of 10 dB or more. Surveillance samples are tested to verify that the failure rate has not changed,
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Agere Systems Inc.
Data Sheet December 2000
D372-Type Digital Uncooled DFB Laser Module for 2.5 Gbits/s Applications
Qualification Information
The D372-type laser module is scheduled to complete 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 4. D372-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
Telcordia Technologies 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.
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