MITSUBISHI

MITSUBISHI LASER DIODESML4XX2 SERIESFOR OPTICAL INFORMATION SYSTEMSI Forward current va. voltageTypical forward current vs. voltage characteristicsare shown in Fig. 4. In general, as the casetemperature rises, the forward voltage VF decreasesslightly against the constant current IF. VF variesty'picallY at a rate of - 2.0mV/"C at IF = , mA.:( 30-5.,!!,E20§""E~ 10~Fig, 4 Forward current vs. voltage40TC=50~J25"C1.0 2.0Forward voltage VF (V)I Optical output dependence of emission spectraTypical emission spectra under CW operation areshown in Fig.5. In general, at an output of 3mW,single mode is observed. The peak wavelengthdepends on the operating case temperature andforward current (output level),Fig. 5 Emission spectra under CW operationTe = 25"CXl5mWX23mWX20 j lmWX20Ith770 780 790Wavelength .l.(nm)IDTemperature dependence of peak wavelengthA typical temperature dependence of the peakwavelength at an output of CW, 3mW is shown inFig.6.As the temperature rises, the peak wavelengthshifts to the long wavelength side at a rate ofabout O.26nm/"C typical.Fig. 6 Temperature dependence of peak wavelengthE-50-"".~""~785 Po = 3mW784783782r-78 1 lr..-78025 30~)'35J40Case temperature Te ("C)2- 21