发明授权
- 专利标题： Spatial light modulation in compound semiconductor materials
- 专利标题（中）： 化学半导体材料中的空间光调制
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申请号： US172007申请日： 1988-03-23
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公开(公告)号： US4898436A公开(公告)日： 1990-02-06
- 发明人: Li-Jen Cheng , Gregory O. Gheen , Afshin Partovi
- 申请人： Li-Jen Cheng , Gregory O. Gheen , Afshin Partovi
- 申请人地址： DC Washington
- 专利权人： The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- 当前专利权人： The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- 当前专利权人地址： DC Washington
- 主分类号： G02F1/015
- IPC分类号： G02F1/015 ; G02F1/03
摘要：
Spatial light modulation (22) in a III-V single crystal (12), e.g., gallium arsenide, is achieved using the photorefractive effect. Polarization rotation created by beam coupling is utilized in one embodiment. In particular, information (16)on a control beam (14) incident on the crystal is transferred to an input beam (10), also incident on the crystal. An output beam (18) modulated in intensity is obtained by passing the polarization-modulated input beam through a polarizer (20).