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31. 发明授权

US6141076A Spatial light modulators constructed from ferroelectric liquid crystal devices with twisted structure 失效
标题翻译：由具有扭曲结构的铁电液晶装置构成的空间光调制器
公开(公告)号：US6141076A
公开(公告)日：2000-10-31
申请号：US980447
申请日：1997-11-28
申请人： Jian-Yu Liu , Kuang-Yi Wu , Seng-Ieong Wong
发明人： Jian-Yu Liu , Kuang-Yi Wu , Seng-Ieong Wong
IPC分类号： G02F1/137 , C09K19/02 , G02F1/141 , G02F1/31
CPC分类号： C09K19/0225 , G02F1/141 , G02F1/31
摘要： A hybrid analog/binary electro-optic modulator using a twisted ferroelectric liquid crystal structure is provided. Ferroelectric liquid crystals with a tilt angle of between about 20.degree. and about 25.degree., preferably about 22.5.degree. are used. Rubbing directions for the two cell walls (relative to one another) can be varied from about 45.degree. to about 90.degree.. In one embodiment, a weak buffing force is used resulting in a relatively weak anchoring energy at the surface, aligning the liquid crystal molecules without locking the molecules into the buffing directions and a high pre-tilt structure for the molecules close to the surface boundaries. In one embodiment, strong buffing is used with buffing directions offset about 45.degree.. Use of this invention provides relatively fast response time, low required driving voltage, high contrast, and/or the ability to achieve both analog and binary operations.
摘要翻译：提供了使用扭转铁电液晶结构的混合模拟/二进制电光调制器。使用倾斜角为约20°至约25°，优选约22.5°的铁电液晶。两个细胞壁（相对于彼此）的摩擦方向可以在约45°至约90°之间变化。在一个实施例中，使用弱抛光力导致在表面处相对较弱的锚定能量，使液晶分子对准，而不将分子锁定到抛光方向，并且靠近表面边界的分子具有高预倾斜结构。在一个实施例中，使用强抛光，抛光方向偏移约45°。本发明的使用提供了相对快速的响应时间，低要求的驱动电压，高对比度和/或实现模拟和二进制操作的能力。

32. 发明授权

US6134358A N x N switch array with reduced components 失效
标题翻译： N x N开关阵列具有减少的组件
公开(公告)号：US6134358A
公开(公告)日：2000-10-17
申请号：US141396
申请日：1998-08-27
申请人： Kuang-Yi Wu , Jian-Yu Liu
发明人： Kuang-Yi Wu , Jian-Yu Liu
IPC分类号： G02B6/34 , G02B6/35 , G02F1/31 , H04Q11/00 , G02B6/26
CPC分类号： H04Q11/0005 , G02B6/272 , G02B6/2766 , G02B6/29395 , G02F1/31 , G02B6/3594 , H04Q2011/0026 , H04Q2011/0035 , H04Q2011/0058 , H04Q2011/006
摘要： Switch arrays are provided with controllable polarization modifiers and polarization-dependent diverters, such as one or more polarization beam splitters, for configuring switch arrays which can reduce or eliminate the need for optical fibers in the switch arrays. In one embodiment, input positions configured in a first preferably planar (e.g., horizontal) configuration are routed to one or more of a corresponding plurality of output positions which are configured in a different arrangement such as in an orthogonal (e.g., vertical) planar arrangement. Preferably some or all of the polarization-related optical components, including components such as birefringent devices, liquid crystal polarization rotator arrays and/or polarization beam splitters are integrated so that one such device can be used in connection with a plurality of input and/or output beams.
摘要翻译：开关阵列设置有可控的偏振调节器和偏振相关的分流器，例如一个或多个偏振分束器，用于配置开关阵列，其可以减少或消除对开关阵列中的光纤的需要。在一个实施例中，以第一优选平面（例如，水平）配置配置的输入位置被路由到以不同布置配置的相应多个输出位置中的一个或多个，例如在正交（例如，垂直）平面布置。优选地，包括诸如双折射器件，液晶偏振旋转器阵列和/或偏振分束器的组件的偏振相关光学部件中的一些或全部是集成的，使得一个这样的器件可以结合多个输入和/或输出光束。

33. 发明授权

US6115155A System for dealing with faults in an optical link 失效
公开(公告)号：US6115155A
公开(公告)日：2000-09-05
申请号：US190078
申请日：1998-11-12
申请人： Jian-Yu Liu , Kuang-Yi Wu
发明人： Jian-Yu Liu , Kuang-Yi Wu
IPC分类号： G02B6/34 , G02F1/31 , H04B10/00 , H04B10/02 , H04B10/28 , H04J14/00 , H04J14/02 , H04Q11/00 , H04B10/08 , H04B10/12
CPC分类号： H04J14/0289 , G02B6/272 , G02B6/29302 , G02B6/29361 , G02B6/29395 , G02B6/29397 , G02F1/31 , H04B10/032 , H04J14/0209 , H04J14/0212 , H04J14/0279 , H04Q11/0003 , H04Q11/0005 , H04J14/0208 , H04J14/0213 , H04J14/0283 , H04J14/0291 , H04Q2011/0026 , H04Q2011/0032 , H04Q2011/0035
摘要： A system for dealing with faults in wavelength division multiplexed (WDM) optical communications between two terminals connected by at least two optical fibers monitors the status of communications over both optical fibers. If both optical fibers are operating normally, a first set of channels is routed over the first optical fiber and a second set of channels (which is mutually exclusive of the first set of channels) is routed over the second optical fiber. However, if a fault is detected in either optical fiber, the first terminal combines the first and second sets of channels and routes the combined channels over the remaining optical fiber to the second terminal. The second terminal separates the combined channels to recreate the first and second sets of channels. Wavelength slicers can be used to multiplex and demultiplex the channels at both terminals. This architecture allows the first and second sets of channels to be interdigitally spaced.

34. 发明授权

US6005697A Multi-wavelength cross-connect optical network 失效
标题翻译：多波长交联光网络
公开(公告)号：US6005697A
公开(公告)日：1999-12-21
申请号：US907551
申请日：1997-08-08
申请人： Kuang-Yi Wu , Jian-Yu Liu
发明人： Kuang-Yi Wu , Jian-Yu Liu
IPC分类号： G02B6/34 , G02F1/31 , H04J14/02 , H04Q11/00 , H04Q11/04
CPC分类号： G02B6/272 , G02B6/29302 , G02B6/29395 , G02F1/31 , H04Q11/0003 , H04Q11/0005 , H04J14/0212 , H04J14/0213 , H04Q2011/0016 , H04Q2011/0026 , H04Q2011/0032 , H04Q2011/0035
摘要： An optical cross-connect network provides wavelength routing of optical channels between two arrays of optical fibers carrying WDM signals using interconnected arrays of optical wavelength switches based on combinations of a 1.times.2 wavelength switch architecture. The cross-connect network can be made by interconnecting two arrays of 1.times.4 wavelength switches, each of which is made by combining three 1.times.2 wavelength switches. Each 1.times.2 optical wavelength switch includes a polarization separation element that decomposes and spatially separates the input signal into two orthogonally-polarized beams, and a wavelength filter that decomposes into the beam pair into two pairs of orthogonally-polarized beams that carry a first spectral band at a first polarization and a second spectral band at an orthogonal polarization. A polarization-dependent routing element spatially separates these four beams into four orthogonally-polarized components. A polarization combining element recombines the beams carrying the first spectral band, and also recombines the beams carrying the second spectral band at the output ports based on the control state of the wavelength switch.
摘要翻译：光交叉网络使用基于1x2波长交换机结构的组合的光波长交换机的互连阵列，提供携带WDM信号的两个光纤阵列之间的光信道的波长路由。交叉连接网络可以通过连接1x4波长交换机的两个阵列来进行，每个阵列通过组合三个1x2波长交换机而制成。每个1x2光波长开关包括偏振分离元件，其将输入信号分解并空间分离成两个正交偏振光束，以及波长滤波器，其将波束对分解成两对正交偏振光束，该对正交偏振光束携带第一光谱带在正交极化处的第一极化和第二光谱带。偏振相关路由元件将这四个光束空间分离成四个正交极化分量。偏振组合元件将携带第一光谱带的光束重新组合，并且还基于波长开关的控制状态，在输出端口处重新携带携带第二光谱带的光束。

35. 发明授权

US5978116A Programmable wavelength router 失效
公开(公告)号：US5978116A
公开(公告)日：1999-11-02
申请号：US240550
申请日：1999-01-29
申请人： Kuang-Yi Wu , Jian-Yu Liu
发明人： Kuang-Yi Wu , Jian-Yu Liu
IPC分类号： G02B6/34 , G02F1/31 , H04B10/02 , H04B10/28 , H04J14/00 , H04J14/02 , H04J14/06 , H04Q11/00
CPC分类号： H04J14/0289 , G02B6/272 , G02B6/29302 , G02B6/29395 , G02F1/31 , H04J14/0209 , H04J14/0212 , H04Q11/0003 , H04Q11/0005 , G02B6/29386 , H04J14/0201 , H04J14/0291 , H04J14/06 , H04Q2011/0026 , H04Q2011/0032 , H04Q2011/0035
摘要： A programmable wavelength router having a plurality of cascaded stages where each stage receives one or more optical signals comprising a plurality of wavelength division multiplexed (WDM) channels. Each stage divides the received optical signals into divided optical signals comprising a subset of the channels and spatially positions the divided optical signals in response to a control signal applied to each stage. Preferably each stage divides a received WDM signal into two subsets that are either single channel or WDM signals. A final stage outputs optical signals at desired locations. In this manner, 2.sup.N optical signals in a WDM signal can be spatially separated and permuted using N control signals.

36. 发明授权

US5912748A Switchable wavelength router 失效
标题翻译：可切换波长路由器
公开(公告)号：US5912748A
公开(公告)日：1999-06-15
申请号：US982978
申请日：1997-12-02
申请人： Kuang-Yi Wu , Jian-Yu Liu
发明人： Kuang-Yi Wu , Jian-Yu Liu
IPC分类号： G02B6/34 , G02F1/31 , H04J14/02 , H04Q11/00 , H04Q11/04 , H04J14/00 , H04B10/00
CPC分类号： G02F1/31 , G02B6/272 , G02B6/29302 , G02B6/29362 , G02B6/29395 , H04Q11/0003 , H04Q11/0005 , G02B6/2766 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04Q2011/0026 , H04Q2011/0032 , H04Q2011/0035
摘要： A switchable wavelength router has a first polarization-dependent routing element (e.g., a birefringent element, polarized beamsplitter, or angled polarization separator) that decomposes and spatially separates an incoming WDM optical signal into two orthogonally-polarized beams. A first polarization rotator selectably rotates the polarization of one of the beams to match the polarization of other beam, based on an external control signal. A wavelength filter (e.g., stacked waveplates) provides a polarization-dependent optical transmission function such that the first beam decomposes into third and fourth orthogonal beams, and the second beam decomposes into fifth and sixth orthogonal beams. The third and fifth beams carry a first spectral band at a first polarization and the fourth and sixth beams carry a second spectral band at an orthogonal polarization. A second polarization-dependent routing element spatially separates these four beams into four horizontally polarized and vertically polarized components. A second polarization rotator rotates the polarizations of the beams so that the third and fifth beams, and the fourth and sixth beams are orthogonally polarized. A third polarization-dependent routing element recombines the third and fifth beams (i.e., the first spectral band), and also recombines the fourth and sixth beams (i.e., the second spectral band) which are coupled to the two output ports based on the control state of the wavelength router.
摘要翻译：可切换波长路由器具有将入射WDM光信号分解并空间分离成两个正交偏振光束的第一偏振相关路由元件（例如，双折射元件，偏振分束器或倾斜偏振分离器）。基于外部控制信号，第一偏振旋转器可选地使一个光束的偏振旋转以匹配其他光束的偏振。波长滤波器（例如，堆叠波片）提供偏振相关的光传输功能，使得第一波束分解成第三和第四正交波束，第二波束分解成第五和第六正交波束。第三和第五波束在第一极化处携带第一光谱带，第四和第六波束在正交极化处携带第二光谱带。第二偏振相关路由元件将这四个光束空间分离成四个水平极化和垂直极化分量。第二偏振旋转器使光束的偏振旋转，使得第三和第五光束以及第四和第六光束被正交极化。第三偏振相关路由元件将第三和第五波束（即，第一频谱带）重新组合，并且还基于控制来重组耦合到两个输出端口的第四和第六波束（即，第二频谱带）波长路由器的状态。

37. 发明授权

US5694233A Switchable wavelength router 失效
标题翻译：可切换波长路由器
公开(公告)号：US5694233A
公开(公告)日：1997-12-02
申请号：US780291
申请日：1997-01-08
申请人： Kuang-Yi Wu , Jian-Yu Liu
发明人： Kuang-Yi Wu , Jian-Yu Liu
IPC分类号： G02F1/31 , G02B6/34 , H04B10/02 , H04J14/00 , H04J14/02 , H04Q3/52 , H04Q11/00 , H04B10/00
CPC分类号： G02B6/272 , G02B6/29302 , G02B6/29362 , G02B6/29395 , G02F1/31 , H04Q11/0003 , H04Q11/0005 , G02B6/2766 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04Q2011/0026 , H04Q2011/0032 , H04Q2011/0035
摘要： A switchable wavelength router has a first birefringent element that decomposes and spatially separates an incoming WDM optical signal into two orthogonally-polarized beams. A first polarization rotator selectably rotates the polarization of one of the beams to match the polarization of other beam, based on an external control signal. A wavelength filter (e.g., stacked waveplates) provides a polarization-dependent optical transmission function such that the first beam decomposes into third and fourth orthogonal beams, and the second beam decomposes into fifth and sixth orthogonal beams. The third and fifth beams carry a first spectral band at a first polarization and the fourth and sixth beams carry a second spectral band at an orthogonal polarization. A second birefringent element spatially separates these four beams into four horizontally polarized and vertically polarized components. A second polarization rotator rotates the polarizations of the beams so that the third and fifth beams, and the fourth and sixth beams are orthogonally polarized. A third birefringent element recombines the third and fifth beams (i.e., the first spectral band), and also recombines the fourth and sixth beams (i.e., the second spectral band) which are coupled to the two output ports based on the control state of the wavelength router.
摘要翻译：可切换波长路由器具有第一双折射元件，其将入射的WDM光信号分解并空间分离成两个正交偏振光束。基于外部控制信号，第一偏振旋转器可选地使一个光束的偏振旋转以匹配其他光束的偏振。波长滤波器（例如，堆叠波片）提供偏振相关的光传输功能，使得第一波束分解成第三和第四正交波束，第二波束分解成第五和第六正交波束。第三和第五波束在第一极化处携带第一光谱带，第四和第六波束在正交极化处携带第二光谱带。第二个双折射元件将这四个光束空间分离成四个水平极化和垂直极化的分量。第二偏振旋转器使光束的偏振旋转，使得第三和第五光束以及第四和第六光束被正交极化。第三双折射元件将第三和第五光束（即，第一光谱带）重新组合，并且还基于耦合到两个输出端口的第四和第六光束（即，第二光谱带）重新组合基于波长路由器。

38. 发明授权

US5781268A Polarization-insensitive fabry-perot tunable filter 失效
标题翻译：极化不敏感的fabry-perot可调滤波器
公开(公告)号：US5781268A
公开(公告)日：1998-07-14
申请号：US629976
申请日：1996-04-09
申请人： Jian-Yu Liu , Charles S. Wong , Kristina M. Johnson , Gary D. Sharp
发明人： Jian-Yu Liu , Charles S. Wong , Kristina M. Johnson , Gary D. Sharp
IPC分类号： G02F1/13363 , G02F1/21 , G02F1/1335 , G02F1/139
CPC分类号： G02F1/216 , G02F2001/133638 , G02F2203/06
摘要： This invention provides polarization-independent optical filters that are Fabry-Perot filters. The inventive filters incorporate a phase modulator within the FP cavity and two quarter-wave plates, one on either side of the phase modulator, in the cavity. The quarter-wave plates are perpendicular to each other and oriented at .+-.45.degree. with respect to the optic axis of the phase modulator. A variety of phase modulators including those that incorporate nematic and smectic liquid crystal optical modulators can be employed in these FP filters. The filters of this invention are particularly useful in fiber optic systems and in telecommunications applications at 1550 nm.
摘要翻译：本发明提供了法布里 - 珀罗滤波器的偏振非依赖光滤波器。本发明的滤光器在FP空腔内并入相位调制器，在空腔中包括两个1/4波片，一个位于相位调制器的两侧。四分之一波片彼此垂直并相对于相位调制器的光轴定向在+/- 45°。包括向列型和近晶型液晶光调制器的各种相位调制器可用于这些FP滤波器。本发明的滤波器在1550nm的光纤系统和电信应用中特别有用。

39. 发明授权

US5493426A Lateral electrode smectic liquid crystal devices 失效
标题翻译：侧面电极近晶体液晶装置
公开(公告)号：US5493426A
公开(公告)日：1996-02-20
申请号：US056415
申请日：1993-05-03
申请人： Kristina M. Johnson , Anat Sneh , Jian-Yu Liu , Gary D. Sharp
发明人： Kristina M. Johnson , Anat Sneh , Jian-Yu Liu , Gary D. Sharp
IPC分类号： G02F1/13 , G02F1/1335 , G02F1/13363 , G02F1/1337 , G02F1/1343 , G02F1/1347 , G02F1/135 , G02F1/137 , G02F1/139 , G02F1/141 , G02F1/21 , G02F1/133
CPC分类号： G02F1/1418 , G02F1/13471 , G02F1/135 , G02F1/141 , G02F1/216 , G02F1/134309 , G02F1/134363 , G02F1/13439 , G02F2001/133638 , G02F2001/133738 , G02F2001/133742 , G02F2203/05 , G02F2203/055 , G02F2203/06 , G02F2203/50
摘要： This invention provides smectic liquid crystal cells with lateral electrodes. The effective change in refractive index with field-induced tilting of the liquid crystal molecules is increased by providing an angle between the direction of propagation of light and the direction of the molecular directors at zero applied field. For homeotropically aligned liquid crystals this is accomplished by inclining the incident light beam at an oblique angle to the device surface. For tilted layer cells the liquid crystal layers are tilted and the light can impinge at normal incidence. This invention further provides Fabry-Perot filters utilizing lateral electrode liquid crystal cells.
摘要翻译：本发明提供具有横向电极的近晶液晶单元。通过在零施加场处提供光的传播方向和分子导向器的方向之间的角度来增加液晶分子的场致倾斜的折射率的有效变化。对于垂直取向的液晶，这是通过使入射光束以与设备表面成倾斜角倾斜来实现的。对于倾斜层细胞，液晶层倾斜，并且光可以以正常入射的方式入射。本发明还提供了利用横向电极液晶单元的法布里 - 珀罗滤波器。

40. 发明授权

US06489783B1 Test device and method 有权
标题翻译：测试装置和方法
公开(公告)号：US06489783B1
公开(公告)日：2002-12-03
申请号：US09715227
申请日：2000-11-17
申请人： Jian-Yu Liu , Ming-Yi Lay
发明人： Jian-Yu Liu , Ming-Yi Lay
IPC分类号： G01R2726
CPC分类号： G01R31/129
摘要： A time dependent dielectric breakdown (TDDB) test device is used for testing a dielectric layer to obtain a time to failure (TTF) data, wherein the TDDB test device is electrically connected between a power source and a current detector and the dielectric layer includes at least a first capacitor and a second capacitor formed about selected first and second locations of the dielectric layer. The device includes a first current-limiting apparatus electrically connected to the first capacitor in series, a second current-limiting apparatus electrically connected to the second capacitor in series and the first current-limiting apparatus in parallel, and a voltage-regulating apparatus electrically connected to the second current-limiting apparatus in series. It also provides a method for implementing such device.
摘要翻译：使用时间依赖介质击穿（TDDB）测试装置来测试电介质层以获得故障时间（TTF）数据，其中TDDB测试装置电连接在电源和电流检测器之间，并且电介质层包括在形成在介电层的所选择的第一和第二位置周围的至少一个第一电容器和第二电容器。该装置包括串联电连接到第一电容器的第一限流装置，与第二电容器串联电连接的第二限流装置和并联的第一限流装置，以及电连接的电压调节装置连接到第二限流装置。它还提供了一种实现这种设备的方法。

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