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11. 发明授权

US06832028B2 Liquid crystal adaptive coupler for steering a light beam relative to a light-receiving end of an optical waveguide 有权
标题翻译：用于相对于光波导的光接收端转向光束的液晶自适应耦合器
公开(公告)号：US06832028B2
公开(公告)日：2004-12-14
申请号：US10267282
申请日：2002-10-08
申请人： Dong-Feng Gu , Donald B. Taber , Bruce K. Winker
发明人： Dong-Feng Gu , Donald B. Taber , Bruce K. Winker
IPC分类号： G02B626
CPC分类号： G02F1/292 , G02B6/32 , G02B6/351 , G02B6/3556 , G02F1/1392
摘要： An apparatus for optically coupling a light source with a light-receiving end face of an optical waveguide comprises a lens for focusing a light beam emitted from the light source at a focal point on the light-receiving end face of the optical waveguide. An adaptive coupler, positioned in the optical path, is responsive to a beam steering control signal for steering and aligning the focal point relative to the light-receiving end face of the optical waveguide. In one form, the adaptive coupler comprises a pair of transparent substrates having confronting, parallel inner faces, the inner face of one of the pair of substrates carrying a beam intercepting, optically transparent, constant potential electrode and the inner face of the other of the pair of substrates carrying an electrically resistive, beam intercepting, optically transparent film. A pair of spaced apart electrodes in electrical contact with the film apply a linear voltage gradient along the film. An electro-optical phase shifting medium is disposed between the confronting inner faces of the substrates. The application of selected voltages to the electrodes creates a linear voltage gradient along the aforementioned film on the inner face of the one substrate resulting in a linearly varying electric field between that film and the constant potential electrode creating a corresponding linear variation in the refractive index of the liquid crystal medium and a linear wavefront tilt in the intercepting optical beam.
摘要翻译：用于将光源与光波导的光接收端面光学耦合的装置包括用于将从光源发射的光束聚焦在光波导的光接收端面上的焦点处的透镜。位于光路中的自适应耦合器响应于光束转向控制信号，用于相对于光波导的光接收端面转向和对准焦点。在一种形式中，自适应耦合器包括一对具有相对的平行内表面的透明基板，一对基板中的一个基板的内表面承载光束拦截，光学透明的恒定电位电极，另一个的内表面一对基板承载电阻，光束截取的光学透明膜。与膜电接触的一对间隔开的电极沿膜施加线性电压梯度。电光相移介质设置在基板的相对的内表面之间。将选择的电压施加到电极在一个衬底的内表面上沿着上述膜产生线性电压梯度，导致该膜和恒电位电极之间线性变化的电场产生相应的线性变化液晶介质和截取光束中的线性波前倾斜。

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