发明授权
- 专利标题: Optical filter element and wavelength division multiplexing optical coupler
- 专利标题(中): 光滤波元件和波分复用光耦合器
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申请号: US11334756申请日: 2006-01-17
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公开(公告)号: US07356223B2公开(公告)日: 2008-04-08
- 发明人: Taku Ito
- 申请人: Taku Ito
- 申请人地址: JP Tokyo
- 专利权人: Nippon Sheet Glass Company, Limited
- 当前专利权人: Nippon Sheet Glass Company, Limited
- 当前专利权人地址: JP Tokyo
- 代理机构: Marsh Fischmann & Breyfogle LLP
- 优先权: JP2005-012112 20050119; JP2005-012113 20050119; JP2005-012114 20050119; JP2005-012115 20050119
- 主分类号: G02B6/32
- IPC分类号: G02B6/32
摘要:
An optical filter element having high isolation and reduction in reflection loss for input light beams. The optical filter element is used with a transparent substrate having a surface that includes a first area and a second area. The optical filter element has a target wavelength range. The optical filter element includes a first dielectric multilayer film arranged in the first area of the transparent substrate. A second dielectric multilayer film is arranged in the second area of the surface of the transparent substrate. The second dielectric multilayer film has a reflectance of a predetermined value or less for a light beam having a wavelength in the target wavelength range. A portion of the second dielectric multilayer film and a portion of the first dielectric multilayer film are laminated each other.