Abstract

The temperature dependence of threshold current and of laser emission wavelength was investigated for the gain-guided multiple-stripe phased-array GaAIAs lasers in cw operating conditions. The laser threshold current increased with temperature in a manner similar to that of conventional single-stripe GaAIAs lasers. For 10-stripe lasers, the characteristic temperature had a mean value of ~150 K, while lasers with more than 10 stripes showed a relatively lower characteristic temperature. The dependence of laser emission wavelength and mode pattern on temperature was examined at constant operating current conditions. For all lasers tested, the wavelength showed a red shift of ~0.3 nm/deg as the temperature increased. The number of longitudinal modes remained nearly unchanged, while the mode-intensity profile showed certain variations as the temperature changed. In general, the laser output was found to be fairly stable under constant-temperature operation.

© 1986 Optical Society of America