发明名称 |
OPTICAL TRANSMITTER HAVING OPTICAL MODULATOR |
摘要 |
An optical transmitter having a Mach-Zender waveguide optical modulator (48) comprising a signal electrode (12) fed with a driving signal for effecting modulation, a bias electrode (16) for controlling operating point and a bias feedback control circuit. Because the signal electrode and the bias electrode are isolated from each other, a driving circuit (54) and the signal electrode (12) can be connected in a DC setup. This permits stable operating point control and improves waveform characteristics. Also it is disclosed an optical transmitter having a Mach-Zender waveguide optical modulator with a delay optical waveguide (118) directionally coupled to at least one of the Mach-Zender branching optical waveguides and provided with an electrode (124,126) for controlling the directional coupling ratio. |
申请公布号 |
EP0547394(A3) |
申请公布日期 |
1993.09.01 |
申请号 |
EP19920119707 |
申请日期 |
1992.11.19 |
申请人 |
FUJITSU LIMITED |
发明人 |
NISHIMOTO, HIROSHI;MINAMI, TAKATOSHI;HAKOGI, HIRONAO |
分类号 |
G02F1/01;G02F1/225;H04B10/155;(IPC1-7):G02F1/225;G02F1/035;H04B10/14 |
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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