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Takeshi KOBAYASHI Koich WAKITA Tsuyoshi KAWAKAMI Genzo IWANE Yoshiji HORIKOSHI Yasuo SEKI Yoshitaka FURUKAWA
Accelerated life test of AlGaAs-GaAs DH lasers were carried out at ambient temperatures of 70, 90, 100 and 110. The temperature dependence of degradation rates deduced from the experimental results indicated the presence of the activation energy of 0.7-0.9 eV. The median lifetime extrapolated to 25 was 1.3106 hrs for the activation energy of 0.7 eV. The degradation of dynamic characteristics of lasers is also demonstrated.