发明名称 |
Semiconductor laser device and optical disk drive |
摘要 |
An optical disk drive has an aberration detector and an aberration correction circuit. A semiconductor laser device made of semiconductor crystals constituting a semiconductor laser light source includes an active layer for performing light amplification through current injection and guiding light in waveguide, a reflection member for reflecting light into said active layer, and a top electrode and a bottom electrode used for current injection to the active layer, wherein the top electrode is divided into a main electrode and a plurality of subsidiary electrodes, and injection current to the subsidiary electrodes is controlled so as to correct an aberration generated at an optical focussing system and an optical disk.
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申请公布号 |
US5781576(A) |
申请公布日期 |
1998.07.14 |
申请号 |
US19960697002 |
申请日期 |
1996.08.16 |
申请人 |
HITACHI, LTD. |
发明人 |
KIMURA, KATSUHIKO;SAEGUSA, SHOZO;MURANISHI, MASARU |
分类号 |
G11B7/09;G11B7/095;G11B7/125;G11B7/135;H01S5/00;H01S5/022;H01S5/042;H01S5/062;H01S5/0625;H01S5/068;H01S5/0683;H01S5/183;(IPC1-7):H01S3/18 |
主分类号 |
G11B7/09 |
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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