发明授权
- 专利标题： Diffraction grating with alternately-arranged different regions, optical semiconductor device with the diffraction grating, and apparatus and optical communication system using the same
- 专利标题（中）： 具有交替布置的不同区域的衍射光栅，具有衍射光栅的光学半导体器件，以及使用其的光学通信系统
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申请号： US816335申请日： 1997-03-13
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公开(公告)号： US5926497A公开(公告)日： 1999-07-20
- 发明人: Jun Nitta , Yuichi Handa , Hidetoshi Nojiri
- 申请人： Jun Nitta , Yuichi Handa , Hidetoshi Nojiri
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX8-090365 19960319; JPX9-052360 19970220
- 主分类号： G02B5/18
- IPC分类号： G02B5/18 ; B82Y20/00 ; G02B5/30 ; H01S5/00 ; H01S5/042 ; H01S5/062 ; H01S5/0625 ; H01S5/12 ; H01S5/32 ; H04B10/40 ; H04B10/50 ; H04B10/508 ; H04B10/532 ; H04B10/572 ; H04B10/58 ; H04B10/60 ; H01S3/19
摘要：
A diffraction grating includes first regions for mainly reflecting first polarized light and second regions for mainly reflecting second polarized light. The first regions and the second regions are alternately arranged in a light propagation direction in a variety of manners to appropriately set its polarization-mode dependency according to need. An optical semiconductor device includes a semiconductor substrate, a laser structure and that diffraction grating formed in the laser structure. The laser structure is a distributed feedback semiconductor laser structure or a distributed Bragg reflector semiconductor laser structure formed on the semiconductor substrate.