MITSUBISHI

MITSUBISHI LASER DIODESML6XX3A SERIESFOR OPTICAL INFORMATION SYSTEMSII Forward current vs. voltageTypical forward current vs. voltage characteristics areshown in Fig. 4. In general, as the case temperaturerises, the forward voltage VFdecreases slightlyagainst the constant current IF. VF varies typicallyat a rate of - 2.0mV /"C at IF = 1 mA.Fig. 4 Forward current vs. voltage5040302 0Tc=50'C~T~=25'C ~0)oo 1.0 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 10mW,single mode is observed. The peak wavelength dependson the operating case temperature ana forWardcurrent (output level).Fig. 5 Emission spectra under CW operationTe - 25"CXl15mWXl10mWX7.9 3mWX250Ith771 781 791Wavelength A (nm)I Temperature dependence of peak wavelengthA typical temperature dependence of the peakwavelength at an output of CW, 10mW is shownin Fig. 6 ..As the temperature rises, the peak wavelengthshifts to the long wavelength side at a rate ofabout O.25nm/oC typical.Fig. 6 Temperature dependence of peak wavelengthE 785-5786Po=lOmWCo"' 784.cc;;c:~., 783~~ 78278 ,25~J1/30 35 40Case temperature Te ("C)• . MITSUBISHI"'-ELECTRIC 2 -111