Long cavity ridge waveguide AlGaAs/GaAs distributed feedback lasers for spectral linewidth reduction

Kojima, Keisuke; Noda, Susumu; Tai, Shuichi; Kyuma, Kazuo; Hamanaki, Koichi; Nakayama, Takashi
August 1986
Applied Physics Letters;8/18/1986, Vol. 49 Issue 7, p366
Academic Journal
Ridge waveguide AlGaAs/GaAs distributed feedback lasers with the cavity length of 820 μm were fabricated. The differential quantum efficiency was as high as 28%, and the power-dependent linewidth was more than an order of magnitude smaller than that of the 290 μm laser, which agrees with theory. The narrowest linewidth was 12 MHz at 6.2 mW.


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