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D372-20FS Datasheet(PDF) 4 Page - Agere Systems |
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D372-20FS Datasheet(HTML) 4 Page - Agere Systems |
4 / 8 page D372-Type Digital Uncooled DFB Data Sheet Laser Module for 2.5 Gbits/s Applications December 2000 4 Agere Systems Inc. Electrical/Optical Characteristics (continued) * 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, Table 3. D372-21 Electrical/Optical Characteristics (over operating temperature range unless otherwise noted) Parameter Symbol Test Conditions Min Typ Max Unit Operating Temperature Range T— 0 — 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 (See Reliability Information, below) 30 — — 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 (See Reliability Information, below) — — 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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