发明名称 |
Variable optical attenuator having a waveguide and an optically coupled layer with a power monitor |
摘要 |
The intensity of signals in optical networks can be controlled using a variable optical attenuator (VOA). The present invention is a VOA that is particularly well suited for optical networks, for example to provide channel-by-channel normalization of gain control of wavelength division multiplexed signals. The inventive VOA includes a waveguide having a cladding that includes an electro-optical material and electrodes that produce an electric field within the electro-optical material when a voltage difference is applied to the electrodes. The VOA also includes a layer that is parallel to the core of the waveguide and that optically couples to the core to receive light from the attenuated signal. A power meter receives light from the layer as an indication of the amount of light attenuated from the signal and for controlling the voltage to the electrodes.
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申请公布号 |
US2005157983(A1) |
申请公布日期 |
2005.07.21 |
申请号 |
US20040761619 |
申请日期 |
2004.01.21 |
申请人 |
AOKI SHIGENORI;YOKOUCHI KISHIO;NAGAEDA HIROSHI;SUGIMOTO KAORU;GLEBOV ALEXEI |
发明人 |
AOKI SHIGENORI;YOKOUCHI KISHIO;NAGAEDA HIROSHI;SUGIMOTO KAORU;GLEBOV ALEXEI |
分类号 |
G02F1/035;G02B6/02;G02B6/10;G02B6/12;G02B6/26;G02B6/42;G02F1/01;(IPC1-7):G02B6/26 |
主分类号 |
G02F1/035 |
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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