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1. 发明公开

EP3139208A4 ADJUSTABLE OPTICAL ATTENUATOR 有权
标题翻译： EINSTELLBARER OPTISCHERDÄMPFER
公开(公告)号：EP3139208A4
公开(公告)日：2017-06-21
申请号：EP14893120
申请日：2014-10-22
申请人： HUAWEI TECH CO LTD
发明人： MAO CHONGCHANG , LI MINCHUN , MIN HONG
IPC分类号： G02F1/29
CPC分类号： G02F1/292 , G02B27/30 , G02F1/1393 , G02F1/29 , G02F2201/30 , G02F2201/34 , G02F2203/07
摘要： Embodiments of the present invention provide a variable optical attenuator. The variable optical attenuator includes: a collimator, a switchable polarization grating, a reflector, and a voltage controller for adjusting a voltage between electrodes at both ends of a liquid crystal layer of the switchable polarization grating, where the collimator, the switchable polarization grating, and the reflector are disposed successively; the collimator is configured to receive incident light and output the incident light to the switchable polarization grating; the switchable polarization grating is configured to diffract the incident light for one time and then perform emission onto the reflector; the switchable polarization grating is further configured to diffract, for one time, a beam reflected back by the reflector, and then emit resulting diffracted light; and the collimator is further configured to receive the diffracted light and output the diffracted light. The variable optical attenuator provided in the embodiments of the present invention has an extremely wide dynamically variable range, and is characterized by high reliability, a small size, and a low cost.
摘要翻译：本发明的实施例提供了一种可变光衰减器。可变光衰减器包括：准直器，可切换偏振光栅，反射器以及电压控制器，用于调节可切换偏振光栅的液晶层两端的电极之间的电压，其中准直器，可切换偏振光栅，和反射器依次设置; 准直器被配置为接收入射光并将入射光输出到可切换偏振光栅; 可切换偏振光栅被配置为衍射入射光一次，然后发射到反射器上; 可切换偏振光栅还被配置为衍射一次由反射器反射回来的光束，然后发射所产生的衍射光; 准直仪还被构造成接收衍射光并输出衍射光。本发明实施例提供的可变光衰减器具有极宽的动态可变范围，具有可靠性高，体积小，成本低的特点。

2. 发明公开

EP2766766A4 METHOD AND APPARATUS FOR WAVELENGTH SELECTIVE SWITCH 审中-公开
标题翻译：方法和设备的选择波长SWITCH
公开(公告)号：EP2766766A4
公开(公告)日：2015-02-11
申请号：EP13743881
申请日：2013-01-30
申请人： HUAWEI TECH CO LTD
发明人： MAO CHONGCHANG , LI MINCHUN , CHEN BO , FANG YANG
IPC分类号： G02B26/08 , G02B5/18 , G02B5/30 , G02B5/32 , G02B6/35 , G02B27/44 , G02F1/13 , G02F1/1347 , G02F1/31 , H04J14/02 , H04Q3/00
CPC分类号： 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
摘要： 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 1×N 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.

3. 发明公开

EP3133749A4 OPTICAL SWITCH BASED ON LIQUID CRYSTAL GRATING 有权转让
标题翻译： OPTISCHER SCHALTER AUF DER BASIS EINESFLÜSSIGKRISTALLGITTERS
公开(公告)号：EP3133749A4
公开(公告)日：2017-06-07
申请号：EP14891172
申请日：2014-10-31
申请人： HUAWEI TECH CO LTD
发明人： MAO CHONGCHANG , LI MINCHUN , WANG SICHAO
IPC分类号： H04B10/25
CPC分类号： H04Q11/0005 , G02F1/137 , G02F1/31 , H04B10/25 , H04J14/06 , H04Q2011/0015 , H04Q2011/0026 , H04Q2011/0035 , H04Q2011/0039 , H04Q2011/0052
摘要： Embodiments of the present invention provide a liquid crystal grating-based optical switching apparatus, including an input collimator 101, an input polarization beam splitter 201, an input quarter-wave plate 301, a liquid crystal grating 4, an output quarter-wave plate 302, an output polarization beam splitter 202, and an output collimator 102. A transmission path is selected for an optical signal by changing a voltage of a liquid crystal grating, so that the optical signal is output to a selected output end. Such optical switching apparatus with low costs has a simple structure and a small size.
摘要翻译：本发明实施例提供了一种基于液晶光栅的光开关装置，包括输入准直器101，输入偏振分束器201，输入四分之一波片301，液晶光栅4，输出四分之一波片302 ，输出偏振分束器202和输出准直器102.通过改变液晶光栅的电压为光信号选择传输路径，从而将光信号输出到选定的输出端。这种低成本的光开关装置结构简单，体积小。

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