发明名称 |
Electrode systems for optical modulation and optical modulators |
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.
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申请公布号 |
EP1441250(A2) |
申请公布日期 |
2004.07.28 |
申请号 |
EP20040250115 |
申请日期 |
2004.01.12 |
申请人 |
NGK INSULATORS, LTD. |
发明人 |
AOKI, KENJI;MITOMI, OSAMU;KONDO, JUNGO;KONDO, ATSUO |
分类号 |
G02F1/015;G02F1/03;G02F1/035;G02F1/225;(IPC1-7):G02F1/035 |
主分类号 |
G02F1/015 |
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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