COAX products - Modulight

ML-T-1490-DFB-2G51490 nm DFB Laser Diode for 1.25 Gb/s and 2.5 Gb/sOverviewModulight's ML-1490-T-DFB-2G5 series are high-performanceDistributed Feedback (DFB) laser diodes in 5.6mm TO-can. The lasers emit single longitudinal mode at1490 nm wavelength. Laser diode emission wavelength iscontrolled by an internal grating. The can package includesan InGaAs monitor photodiode for feedback loop.ML-1490-T-DFB-2G5 series have been especially designedfor digital optical communication in passive opticalnetworks (PON) with up to 3.125 Gb/s modulation speeds.Products are available in two power variants with eithera flat window cap or a specially designed low-profile capwith aspheric lens for higher single-mode fiber couplingefficiency and smaller footprint in demanding small formfactor transceiver applications.Electro-Optical Characteristics 1,2Parameter Symbol Min Typ Max Unit Test ConditionRated optical power 3 PR 6/10 - - mW 0-70°CThreshold current 4 Ith - 18 30 mA 25°C- 35 - 70°COperating current Iop - 38 50 mA 25°C, Pop=5 mW- 65 - 70°C, Pop=5 mWOperating voltage Vop - 1.2 1.6 V 0-70°C, Pop=5 mWSerial resistance 5 Rs - 6 - Ω 25°C, Pop=5 mWSlope efficiency 5 η 0.17 0.26 - W/A 25°C, Pop=5 mW- 0.16 - 70°C, Pop=5 mWCentral wavelength λc 1487 1490 1493 nm 25°C, Pop=5 mW1482 - 1498 0-70°C, Pop=5 mWSpectral width 6 ∆λ - 0.11 0.2 nm 25°C, Pop=5 mW- 0.07 0.2 70°C, Pop=5 mWSide Mode Suppression Ratio 7 SMSR 30 40 - dB 0-70°C, Pop=5 mWTemperature shift of wavelength ∂λ/∂Τ - 0.11 - nm/K 0-70°C, Pop=5 mWPerpendicular beam θ⊥ - 45 - deg 25°C, Pop=5 mWdivergence angle (FWHM) 8Parallel beam divergence θ|| - 26 - deg 25°C, Pop=5 mWangle (FWHM) 8Modulation bandwidth f-3dB 6 - - GHz 25°C, Iop=Ith+16 mA4 - - 70°C, Iop=Ith+16 mAMonitor current Im 40 100 700 µA 25°C, Pop=5 mWMonitor dark current Id - 0.1 1.0 µA 25°C, VRPD=5 VMonitor capacitance Cm - 5 10 pF f=1 MHz, VRPD=5 VTracking error γ -1 - 1 dB Im=constant,Po=5mW@25°CFocal length 9 Df (3.77) (3.87) (3.97) mm 25°C, Pop=5 mWFiber coupling efficiency - (35) - % 25°C, Pop=5 mW,aspheric lens cap type24