公开(公告)号：WO2013113278A1

公开(公告)日：2013-08-08

申请号：PCT/CN2013/071130

申请日：2013-01-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： MAO, Chongchang ,  LI, Minchun ,  CHEN, Bo ,  FANG, Yang

IPC: G02B26/08 ,  G02F1/13

CPC classification number: G02F1/31 ,  G02B3/005 ,  G02B5/12 ,  G02B6/29383 ,  G02B6/356 ,  G02B6/3594 ,  G02B17/0864 ,  G02B26/0808 ,  G02B27/285 ,  G02B27/286 ,  G02F1/0136 ,  G02F1/133528 ,  G02F1/133788 ,  G02F1/13471 ,  G02F1/292 ,  G02F2001/133538 ,  G02F2001/133541 ,  G02F2001/13355 ,  G02F2001/133757 ,  G02F2001/311 ,  G02F2201/305 ,  G02F2203/05 ,  G02F2203/07 ,  H04J14/0212 ,  H04Q3/00 ,  H04Q2011/0015 ,  H04Q2213/1301

Abstract: Apparatus and method embodiments are provided for implementing a wavelength selective switch (WSS). The embodiments use combinations of switchable polarization grating (SPG) and LC cells and combinations of polymer polarization grating (PPG) and LC cells to achieve Ι ×Ν WSS systems. An embodiment optical switch includes a liquid crystal cell and a SPG cell adjacent to the liquid crystal cell. The SPG includes liquid crystal material between two photo-alignment layers, an electrode layer overlying each photo-alignment layer, and a glass substrate overlying each electrode layer. An embodiment method includes polarizing an incident light beam at a circular polarization before diffracting, at a polarization grating, the polarized incident light beam in a determined angle that corresponds to a diffraction order in accordance to the circular polarization of the incident light beam and a hologram pattern direction formed inside the polarization grating.

Abstract translation: 提供了用于实现波长选择开关（WSS）的装置和方法实施例。 这些实施例使用可切换偏振光栅（SPG）和LC单元以及聚合物偏振光栅（PPG）和LC单元的组合的组合来实现Iota×Nu WSS系统。 实施例光开关包括液晶单元和与液晶单元相邻的SPG单元。 SPG包括在两个光取向层之间的液晶材料，覆盖每个光取向层的电极层和覆盖每个电极层的玻璃基板。 一种实施方式包括使入射光束以圆偏振偏振，在偏振光栅处以与入射光束的圆偏振相对应的衍射级的确定角度的偏振光入射光和全息图 形成在偏振光栅内部的图形方向。