NX8508

www.DataSheet4U.com PRELIMINARY DATA SHEET NEC's InGaAsP MQW-DFB LASER MODULE IN COAXIAL PACKAGE FOR 2.5 Gb/s, CWDM APPLICATIONS FEATURES INTERNAL OPTICAL ISOLATOR PEAK EMISSION WAVELENGTH λp = 1 470 to 1 610 nm (Based on CWDM) OPTICAL OUTPUT POWER Pf = 2.0 mW OPERATING CASE TEMPERATURE RANGE TC = -20 to +85°C SIDE MODE SUPPRESSION RATIO SMSR = 40 dB InGaAs MONITOR PIN-PD WITH SC-UPC CONNECTOR BASED ON TELCORDIA RELIABILITY NX8508 Series DESCRIPTION NEC'S NX8508 Series are 1 470 to 1 610 nm Multiple Quantum Well (MQW) structured Distributed Feed-Back (DFB) laser diode coaxial modules with an internal optical isolator. These devices are ideal for 2.5 Gb/s CWDM application. ELECTRO-OPTICAL CHARACTERISTICS (TC = -20 to +85°C, unless otherwise specified) PART NUMBER SYMBOLS Pf Vop Ith PARAMETER AND CONDITIONS Optical Output Power from Fiber, CW, TC = 25°C, IF = Ith + 20 mA Operating Voltage, CW, Pf = 2.0 mW Threshold Current, TC = 25°C UNIT mW V mA MIN. NX8508 SERIES TYP. 2.0 1.1 10 1.6 20 50 Pth ηd Threshold Output Power, IF = Ith Differential Efficiency Pf = 2.0 mW, TC = 25°C Pf = 2.0 mW Δηd Temperature Dependence of Differential Efficiency ηd (@ TC°C) Δηd = 10 log ηd (@ 25°C) Peak Emission Wavelength, CW, Pf = 2.0 mW, TC = 25°C Temperature Dependence of Peak Emission Wavelength, CW Side Mode Suppression Ratio, Pf = 2.0 mW Rise Time, 20-80%, Pf = 2.0 mW dB μW W/A 0.07 0.04 −3.0 −1.6 0.1 100 MAX. λp Δλ/ΔT SMSR tr nm nm/°C dB ps λp−2 0.08 30 λp *1 0.10 40 λ...