| 摘要 |
PROBLEM TO BE SOLVED: To improve output and reliability of a semiconductor laser by suppressing the COMD(catastrophic optical mirror damage) phenomenon. SOLUTION: An active layer 5 with an InGaAsP compression distortion, two InGaAsP light waveguide layers 3 and 7, and two GaAsP barrier layers 4 and 6 with pull distortions with a larger band gap than the two light waveguide layers are provided on a GaAs substrate 1, thus enabling compression distortion and pull distortion to be completely compensate for each other or enabling the pull distortion to be slightly larger. Furthermore, a disordered window structure part 16 is provided by injecting a B or N ions to the end face of the window structure part or near it, and then heating.
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