| 摘要 |
PROBLEM TO BE SOLVED: To inhibit the biasing of light output distribution even if an angle on the inclination surface of a ridge section differs. SOLUTION: The semiconductor laser 1 comprises a first clad layer 10, an active layer 30 formed on the first clad layer 1, and a second clad layer 40 that is formed on the active layer 30 and has a ridge section. The length of an inclined plane G at the ridge section in the second clad layer 40 differs from that of an inclined plane S.
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