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D372-20GS Datasheet(PDF) 3 Page - Agere Systems |
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D372-20GS Datasheet(HTML) 3 Page - Agere Systems |
3 / 8 page Data Sheet D372-Type Digital Uncooled DFB December 2000 Laser Module for 2.5 Gbits/s Applications 3 Agere Systems Inc. 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 * 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. Table 2. D372-20 Electrical/Optical Characteristics (over operating temperature range unless otherwise noted) Parameter Symbol Test Conditions Min Typ Max Unit Operating Temperature Range T — –40 — 85 °C Optical Output Power PF CW, peak — 2 — mW Threshold Current ITH T = 25 °C T = full range 5 2 11 — 15 50 mA mA Modulation Current IMOD CW, PF = 2.0 mW, T = 25 °C CW, IMON = const.,T = full range 13 7.5 20 — 33 55 mA Slope Efficiency* SE CW, PF = 2.0 mW, T = 25 °C 61 — 154 µW/mA Center Wavelength λC PF = 2.0 mW, CW 1280 — 1335 nm Spectral Width (–20 dB) ∆λ PF = 2.0 mW — — 1 nm Side-mode Suppression Ratio SMSR CW, PF = 2.0 mW 30 40 — dB Tracking Error TE IMON = constant, CW — 0.5 1.25 dB Spontaneous Emission PTH I = (0.9) ITH —— 50 µW Rise/Fall Times tR, tF 10%—90% pulse†, T = 25 °C — 0.125 0.150 ns Dispersion Penalty DP <60 km, 256 ps/nm — — 1.0 dB Optical Return Loss ORL CW 18 — — dB Forward Voltage VF At bias coil — 1.1 1.6 V Input Impedance R — — 25 — Ω Monitor Current IMON VR‡ = 5 V 100 — 1000 µA Monitor Dark Current ID VR‡ = 5 V — 10 200 nA Wavelength Tempera- ture Coefficient — — — 0.09 0.1 nm/ °C |
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