发明名称 |
Wavelength converting device. |
摘要 |
The wavelength converting device comprises a BBO crystal of length L along the propagation direction of incident light C and a filter transmitting only light E by second harmonic generation. The BBO crystal is composed of 10 pieces of crystal equally divided in parallel planes along the propagating direction of the light. Each crystal piece has a crystal axis respectively and is positioned with the crystal angle satisfying a phase matching condition for second harmonic generation and so that the adjacent crystal axis is oriented in a crystallographically different way. The acceptance angle phi in the insensitive direction becomes the same as the acceptance angle theta in the sensitive direction; therefore, there is no necessity for gathering light to an oval shape, and maximum conversion efficiency can be obtained by gathering light with a conventional spherical lens. <IMAGE> |
申请公布号 |
EP0649049(A3) |
申请公布日期 |
1996.05.01 |
申请号 |
EP19940307640 |
申请日期 |
1994.10.18 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
TAIRA, YOICHI |
分类号 |
G02F1/01;G02F1/35;G02F1/355;G02F1/37;H01L31/14;H01S3/109 |
主分类号 |
G02F1/01 |
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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