公开(公告)号：US20050157983A1

公开(公告)日：2005-07-21

申请号：US10761619

申请日：2004-01-21

申请人： Shigenori Aoki ,  Kishio Yokouchi ,  Hiroshi Nagaeda ,  Kaoru Sugimoto ,  Alexei Glebov

发明人： Shigenori Aoki ,  Kishio Yokouchi ,  Hiroshi Nagaeda ,  Kaoru Sugimoto ,  Alexei Glebov

IPC分类号： G02F1/035 ,  G02B6/02 ,  G02B6/10 ,  G02B6/12 ,  G02B6/26 ,  G02B6/42 ,  G02F1/01

CPC分类号： G02F1/011 ,  G02B6/266 ,  G02F1/0121 ,  G02F2201/58 ,  G02F2203/48

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.

摘要翻译： 可以使用可变光衰减器（VOA）来控制光网络中的信号强度。 本发明是特别适用于光网络的VOA，例如提供波分复用信号的增益控制的逐通道归一化。 本发明的VOA包括具有包层的波导，该包层具有电光材料和当对电极施加电压差时在电光材料内产生电场的电极。 VOA还包括平行于波导的核心并且光耦合到芯以从衰减信号接收光的层。 功率计从该层接收光，作为从信号衰减的光量的指示，并用于控制电极的电压。