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公开(公告)号：US20170075189A1
公开(公告)日：2017-03-16
申请号：US15360515
申请日：2016-11-23
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chongchang Mao , Minchun Li , Hong Min
CPC classification number: G02F1/292 , G02B27/30 , G02F1/1393 , G02F1/29 , G02F2201/30 , G02F2201/34 , G02F2203/07
Abstract: 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.
Abstract translation: 本发明的实施例提供一种可变光衰减器。 可变光衰减器包括：准直器，可切换偏振光栅，反射器和电压控制器，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， 反射器依次配置; 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将入射光衍射一次，然后对反射器执行发射; 可切换偏振光栅还被配置为一次衍射由反射器反射回的光束，然后发射所产生的衍射光; 并且准直器还被配置为接收衍射光并输出衍射光。
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公开(公告)号：US20150185583A1
公开(公告)日：2015-07-02
申请号：US14641176
申请日：2015-03-06
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chongchang Mao , Minchun Li , Bo Chen , Yang Fang
IPC: G02F1/31 , G02F1/1337 , G02B6/35 , G02F1/1335 , G02B6/293 , G02F1/29 , G02F1/1347
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 1×N WSS systems. An embodiment optical switch includes a liquid crystal cell and a polymer polarization grating (PPG) cell adjacent to the liquid crystal cell. The PPG includes a glass substrate, a photo-alignment layer overlying the glass substrate and comprising photosensitive polymer that has been physically altered by exposure using two interfering light beams with opposite handedness of circular polarization, and a polymerized liquid crystal layer overlying the photo-alignment layer on an opposite side of the glass substrate, the polymerized liquid crystal layer has been physically altered by illumination using a uniform light beam.
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1×N WSS系统。 实施例光开关包括液晶单元和与液晶单元相邻的聚合物偏振光栅（PPG）单元。 PPG包括玻璃基板，覆盖在玻璃基板上的光取向层，并且包括通过使用具有相反旋转圆偏振的两个干涉光束的曝光物理地改变的光敏聚合物和覆盖光取向的聚合液晶层 在玻璃基板的相对侧上，通过使用均匀光束的照明物理地改变聚合液晶层。
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公开(公告)号：US20130194537A1
公开(公告)日：2013-08-01
申请号：US13753202
申请日：2013-01-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chongchang Mao , Minchun Li , Bo Chen , Yang Fang
IPC: G02F1/1335
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 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.
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1×N 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。
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Patent Agency Ranking
公开(公告)号：US10284931B2
公开(公告)日：2019-05-07
申请号：US15346540
申请日：2016-11-08
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chongchang Mao , Minchun Li , Sichao Wang
Abstract: Embodiments of the present invention provide a liquid crystal grating-based optical switching apparatus, including an input collimator, an input polarization beam splitter, an input quarter-wave plate, a liquid crystal grating, an output quarter-wave plate, an output polarization beam splitter, and an output collimator. 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.
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公开(公告)号：US20170055051A1
公开(公告)日：2017-02-23
申请号：US15346540
申请日：2016-11-08
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chongchang Mao , Minchun Li , Sichao Wang
CPC classification number: H04Q11/0005 , G02F1/137 , G02F1/31 , H04B10/25 , H04J14/06 , H04Q2011/0015 , H04Q2011/0026 , H04Q2011/0035 , H04Q2011/0039 , H04Q2011/0052
Abstract: Embodiments of the present invention provide a liquid crystal grating-based optical switching apparatus, including an input collimator, an input polarization beam splitter, an input quarter-wave plate, a liquid crystal grating, an output quarter-wave plate, an output polarization beam splitter, and an output collimator. 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.
Abstract translation: 本发明的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，输入偏振分束器，输入四分之一波片，液晶光栅，输出四分之一波片，输出偏振光束 分路器和输出准直器。 通过改变液晶光栅的电压使得光信号被输出到所选择的输出，为光信号选择传输路径。
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公开(公告)号：US09201286B2
公开(公告)日：2015-12-01
申请号：US14641176
申请日：2015-03-06
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chongchang Mao , Minchun Li , Bo Chen , Yang Fang
IPC: G02F1/1335 , G02F1/31 , G02F1/01 , G02B27/28 , G02F1/1337 , G02F1/1347 , G02F1/29 , H04Q3/00 , G02B6/35 , H04J14/02 , G02B17/08 , G02B6/293 , G02B26/08 , H04Q11/00 , G02B3/00 , G02B5/12
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 1×N WSS systems. An embodiment optical switch includes a liquid crystal cell and a polymer polarization grating (PPG) cell adjacent to the liquid crystal cell. The PPG includes a glass substrate, a photo-alignment layer overlying the glass substrate and comprising photosensitive polymer that has been physically altered by exposure using two interfering light beams with opposite handedness of circular polarization, and a polymerized liquid crystal layer overlying the photo-alignment layer on an opposite side of the glass substrate, the polymerized liquid crystal layer has been physically altered by illumination using a uniform light beam.
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1×N WSS系统。 实施例光开关包括液晶单元和与液晶单元相邻的聚合物偏振光栅（PPG）单元。 PPG包括玻璃基板，覆盖在玻璃基板上的光取向层，并且包括通过使用具有相反旋转圆偏振的两个干涉光束的曝光物理地改变的光敏聚合物和覆盖光取向的聚合液晶层 在玻璃基板的相对侧上，通过使用均匀光束的照明物理地改变聚合液晶层。
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公开(公告)号：US09927678B2
公开(公告)日：2018-03-27
申请号：US15360515
申请日：2016-11-23
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chongchang Mao , Minchun Li , Hong Min
CPC classification number: G02F1/292 , G02B27/30 , G02F1/1393 , G02F1/29 , G02F2201/30 , G02F2201/34 , G02F2203/07
Abstract: 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.
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公开(公告)号：US09008470B2
公开(公告)日：2015-04-14
申请号：US13753202
申请日：2013-01-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chongchang Mao , Minchun Li , Bo Chen , Yang Fang
IPC: G02F1/295 , G02F1/1335 , G02F1/01 , G02F1/31 , G02B27/28 , G02F1/1347 , H04Q3/00 , G02B6/35 , H04J14/02 , G02B17/08 , G02F1/1337 , G02F1/29 , G02B26/08 , H04Q11/00 , G02B3/00 , G02B5/12
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 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.
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1×N 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。
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