发明授权
- 专利标题: Electrode systems for optical modulation and optical modulators
- 专利标题(中): 用于光学调制和光学调制器的电极系统
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申请号: US10740850申请日: 2003-12-22
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公开(公告)号: US07218819B2公开(公告)日: 2007-05-15
- 发明人: Kenji Aoki , Osamu Mitomi , Jungo Kondo , Atsuo Kondo
- 申请人: Kenji Aoki , Osamu Mitomi , Jungo Kondo , Atsuo Kondo
- 申请人地址: JP Nagoya
- 专利权人: NGK Insulators, Ltd.
- 当前专利权人: NGK Insulators, Ltd.
- 当前专利权人地址: JP Nagoya
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2003-005291 20030114
- 主分类号: G02B6/26
- IPC分类号: G02B6/26 ; G02F1/035
摘要:
An object of the invention is to provide an electrode system for optical modulation of an optical modulator to reduce a thickness “E” of an electrode required for velocity matching and for reducing a propagation loss in the electrode. A substrate 2 is made of an electrooptic material and has one and the other main faces 2a, 2b opposing each other. An electrode system 20A is provided on the substrate 2 for applying a voltage for modulating light propagating in optical waveguides 6A and 6B. The electrode system 20A includes ground electrodes 3A, 3B and a signal electrode 4. A ratio “W/G” of a width “W” of the signal electrode 4 to a gap “G” between the ground and signal electrodes is 0.8 or higher. Preferably, the substrate 2 has a thickness “T” of 20 μm or larger, in a region where the optical waveguides 6A and 6B are provided.