发明名称 |
Optical device |
摘要 |
An optical device includes a semiconductor optical modulator element (46) which is connected to an end of a signal line (42) in form of a microstrip high-frequency line and whose other electrode is connected to a ground electrode (48) by a bonding wire (50). The signal line (42) includes first and second line portions (42a, 42b). The first line portion (42a) nearer to the entrance of a high-frequency signal has a width W1 determined to adjust its characteristic impedance to 50 OMEGA and a length L1 equal to an integer multiple of +E,fra 1/4+EE of its own guide wavelength. The second line portion (42b) has a width W2 determined to adjust its impedance to an intermediate value between the impedance of the optical modulator element 46 and the impedance of the first line portion (42a), and a length L2 equal to an integer multiple of +E,fra 1/4+EE of its own guide wavelength.
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申请公布号 |
US5729378(A) |
申请公布日期 |
1998.03.17 |
申请号 |
US19960742400 |
申请日期 |
1996.11.04 |
申请人 |
KOKUSAI DENSIN DENWA KABUSIKI KAISHA |
发明人 |
TANAKA, HIDEAKI;MATSUSHIMA, YUICHI |
分类号 |
G02F1/015;G02F1/03;G02F1/035;(IPC1-7):G02F1/03 |
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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