发明名称 |
Semiconductor laser device |
摘要 |
A semiconductor laser device comprises: an active layer; a lower clad layer provided below the active layer; an upper clad layer provided above the active layer; and a current blocking layer, provided above the upper clad layer, for limiting an active region of the active layer in a direction along a width to make the active region of a striped form which has a wide portion and a narrow portion. According to the device, coherence of an oscillated laser beam is reduced, thereby to decrease a feedback induced noise when used for a pickup of an optical information recording/reproducing apparatus.
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申请公布号 |
US5235609(A) |
申请公布日期 |
1993.08.10 |
申请号 |
US19910778550 |
申请日期 |
1991.10.18 |
申请人 |
ROHM CO., LTD. |
发明人 |
UCHIDA, SATOSHI;KUSUNOKI, KAORU;MUSHIAGE, MASATO |
分类号 |
H01S5/00;H01S5/10;H01S5/223 |
主分类号 |
H01S5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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