Abstract
Stable in-phase lateral- and single-longitudinal-mode operation up to four times the threshold (P/sub o/ approximately 100 mW) was achieved in a five-element 1.5- mu m-wavelength Ga/sub 0.3/In/sub 0.7/As/GaInAsP/InP compressive strained MQW grating filter laser array. The threshold current and external differential quantum efficiency under pulsed condition were 330 mA (emitter width of 18 mu m, active region length of 480 mu m) and 17%, respectively. >
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