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1. 发明授权

US6166838A Optical add/drop wavelength switch 失效
公开(公告)号：US6166838A
公开(公告)日：2000-12-26
申请号：US36202
申请日：1998-03-06
申请人： Jian-Yu Liu , Kuang-Yi Wu
发明人： Jian-Yu Liu , Kuang-Yi Wu
IPC分类号： G02F1/31 , G02B6/293 , G02B6/34 , H04B10/02 , H04J14/00 , H04J14/02 , H04Q3/52 , H04Q11/00 , H04J14/06
CPC分类号： G02B6/29302 , G02B6/272 , G02B6/2766 , G02B6/29383 , H04J14/0212 , H04J14/06 , H04Q11/0005 , H04Q2011/0009 , H04Q2011/0016 , H04Q2011/0026 , H04Q2011/0035
摘要： An optical add/drop wavelength switch is controllably changed from a bridge state, in which output is identical to input, e.g. a Wavelength Division Multiplexed (WDM) input, and an add/drop state, In which a signal input to an add port is substituted for a particular wavelength subrange of the WDM input, other wavelengths of the WDM input being unchanged. In one embodiment, the wavelength subrange of the WDM signal is given a polarization different from other wavelengths of the WDM, such as by using a stacked waveplate or other optical filter or polarization discriminator. The differently-polarized wavelengths can the be spatially separated, e.g. by a birefringent element or a polarization beam splitter, preferably In a bit-controlled fashion, such as by using a liquid crystal or other polarization controller. Polarization controllers and discriminators can be used similarly to selectably align or combine the add signal with the portion of the WDM signal outside the subrange. The add/drop wavelength switch can be used, e.g. In an optical token ring network and/or to make-up an optical crossbar for exchanging any arbitrarily designatable channels, e.g. among a plurality of multi-channel optical fibers.

2. 发明授权

US06137606A Optical wavelength router 失效
标题翻译：光波长路由器
公开(公告)号：US06137606A
公开(公告)日：2000-10-24
申请号：US411935
申请日：1999-10-04
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 , H04B14/02 , G02F1/03
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.
摘要翻译：一种具有多个级联级的可编程波长路由器，其中每个级接收包括多个波分复用（WDM）信道的一个或多个光信号。每个级将接收到的光信号划分成包括信道子集的分割光信号，并且响应于施加到每个级的控制信号对分割的光信号进行空间位置。每个级别优选地将接收的WDM信号划分为单个信道或WDM信号的两个子集。最终阶段在期望的位置输出光信号。以这种方式，WDM信号中的2N个光信号可以使用N个控制信号在空间上分离和置换。

3. 发明授权

US5963291A Optical attenuator using polarization modulation and a feedback controller 失效
标题翻译：使用偏振调制的光衰减器和反馈控制器
公开(公告)号：US5963291A
公开(公告)日：1999-10-05
申请号：US897353
申请日：1997-07-21
申请人： Kuang-Yi Wu , Jian-Yu Liu , Yen-Chen Chen
发明人： Kuang-Yi Wu , Jian-Yu Liu , Yen-Chen Chen
IPC分类号： G02F1/03 , G02F1/133 , G02F1/13363 , G02F1/1347 , G02F1/139 , G02F1/31 , G02F1/13 , G02B27/10
CPC分类号： G02F1/31 , G02F1/0311 , G02F1/0322 , G02F1/13318 , G02F1/13363 , G02F1/13471 , G02F1/1393 , G02F2203/48
摘要： An optical power regulator employs a variable optical attenuator having a first birefringent element that spatially separates the input optical beam into two orthogonally-polarized beams. Both beams pass through a polarization modulator (e.g., a liquid crystal material) that rotates their polarizations to an extent determined by the control voltage applied across the polarization modulator. A final birefringent element spatially separates both beams exiting the polarization modulator into two pairs of orthogonally-polarized beams (i.e., two horizontally-polarized and two vertically-polarized components). The thicknesses and optical properties of the birefringent elements are selected so that two of the four beams are combined by the final birefringent element to exit at the output port of the regulator, while the remaining two beams are blocked. As a result, the degree of attenuation is determined by the degree of polarization rotation by the polarization modulator, which in turn is a function of the control voltage applied to the polarization modulator. Preferably, the liquid crystal material used in the polarization modulator has a high optical birefringence and a low dielectric anisotropy, which results in a relatively shallow attenuation curve as a function of applied voltage. The intensity of the optical signal is measured by a photodetector and used by a controller to output the control voltage applied to the liquid crystal material to maintain a desired optical power level at the output port of the regulator.
摘要翻译：光功率调节器采用具有第一双折射元件的可变光衰减器，其将输入光束空间分离成两个正交偏振光束。两个光束通过偏振调制器（例如，液晶材料），其将它们的极化旋转到由施加在偏振调制器上的控制电压确定的程度。最终的双折射元件将离开偏振调制器的两个光束空间分离成两对正交偏振光束（即两个水平极化和两个垂直极化分量）。选择双折射元件的厚度和光学性质，使得四个光束中的两个由最终双折射元件组合以在调节器的输出端口处离开，而剩余的两个光束被阻挡。结果，衰减程度由偏振调制器的偏振旋转程度确定，偏振调制器又是施加到偏振调制器的控制电压的函数。优选地，在偏振调制器中使用的液晶材料具有高的光学双折射和低介电各向异性，这导致作为施加电压的函数的相对浅的衰减曲线。光信号的强度由光电检测器测量，并被控制器用来输出施加到液晶材料的控制电压，以便在调节器的输出端口处保持期望的光功率电平。

4. 发明授权

US06426816B1 Wide transmission optical comb filter with wide pass band and wide stop band 失效
标题翻译：宽传输光梳滤波器，宽通带宽宽阻带
公开(公告)号：US06426816B1
公开(公告)日：2002-07-30
申请号：US09614782
申请日：2000-07-12
申请人： Kuang-Yi Wu , Charles Wong , Jian-Yu Liu , Ye Li
发明人： Kuang-Yi Wu , Charles Wong , Jian-Yu Liu , Ye Li
IPC分类号： H04J1406
CPC分类号： H04J14/02
摘要： The inventive filter forms a four filtering stage device from two filtering stages and a reflective stage. This greatly reduces the noise level in a WDM signal, wherein the signal is one of the odd channels and the even channels, while the noise is present on the other of the odd channels and the even channels. The first stage separates the WDM signal and noise into their polarization components, rotates the components of one of the signal and the noise, and recombines the components of the signal, while blocking a portion of the noise. This output is passed to the second stage which repeats the operation of the first stage. The output of the second stage is then reflected by the reflecting stage back to the second stage, and subsequently the first stage, for processing in reverse order. The inventive filter, via the mirror in the reflecting stage, reduce dispersion of the light during processing.
摘要翻译：本发明的滤波器从两个滤波级和反射级形成四个滤波级装置。这大大降低了WDM信号中的噪声电平，其中信号是奇数通道和偶数通道之一，而噪声存在于奇数通道和偶数通道中的另一个上。第一级将WDM信号和噪声分离成它们的偏振分量，旋转信号和噪声之一的分量，并重新组合信号的分量，同时阻挡噪声的一部分。该输出被传递到重复第一阶段的操作的第二阶段。然后第二级的输出被反射级反射回到第二级，随后被反射到第一级，以相反的顺序进行处理。本发明的滤光器通过反射级中的反射镜减少了处理过程中光的分散。

5. 发明授权

US06337934B1 NxN switch array with polarization displacer 有权
标题翻译：带偏振置换器的NxN开关阵列
公开(公告)号：US06337934B1
公开(公告)日：2002-01-08
申请号：US09627952
申请日：2000-07-28
申请人： Kuang-Yi Wu , Jian-Yu Liu
发明人： Kuang-Yi Wu , Jian-Yu Liu
IPC分类号： G02B626
CPC分类号： H04Q11/0005 , G02B6/272 , G02B6/2766 , G02B6/29395 , G02B6/3594 , G02F1/31 , 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。

6. 发明授权

US06452702B1 N×M digitally programmable optical routing switch 失效
标题翻译： NxM数字可编程光路由交换机
公开(公告)号：US06452702B1
公开(公告)日：2002-09-17
申请号：US09546645
申请日：2000-04-10
申请人： Kuang-Yi Wu , Jian-Yu Liu
发明人： Kuang-Yi Wu , Jian-Yu Liu
IPC分类号： H04J1406
CPC分类号： G02B6/272 , G02B6/2766 , G02B6/2773 , G02F1/31 , H04Q11/0005 , H04Q2011/0024 , H04Q2011/0026 , H04Q2011/0035 , H04Q2011/0052
摘要： An optical routing switch provides polarization-independent and low-crosstalk switching between any of a plurality of input ports and any of a plurality of output ports over a wide operating range of temperatures and wavelengths. Optical signals appearing at each input port are spatially decomposed into two orthogonally-polarized beams by a first polarization-dependent routing element (e.g., a birefringent element or polarized beamsplitter). Beyond this point, a network of optical switches are placed along the optical paths of the pair of light beams. Each optical switch includes: (1) a polarization rotator that switchably controls the polarization of the input light beams so that both of the emergent beams are either vertically or horizontally polarized, according to the control state of the device; and (2) a polarization-dependent routing element that spatially routes the light beam pair to provide physical displacement based on their state of polarization. The final stage for each output port in the network consists of an array of polarization rotators that changes the polarization of at least one of the light beams, so that the two beams become orthogonally polarized. Finally, a polarization-dependent routing element (e.g., a birefringent element) intercepts the two orthogonally-polarized beams and recombines them to exit at the selected output port.
摘要翻译：光路由开关在多个输入端口中的任何一个和多个输出端口中的任何一个在宽的温度和波长的工作范围内提供偏振无关和低串扰切换。出现在每个输入端口的光信号由第一偏振相关路由元件（例如，双折射元件或偏振分束器）在空间上分解为两个正交偏振光束。除此之外，光开关网沿着该对光束的光路放置。每个光开关包括：（1）根据装置的控制状态，可转换地控制输入光束的偏振，使两个出射光束垂直或水平偏振的偏振旋转器; 和（2）偏振相关的路由元件，其在空间上路由光束对以基于其极化状态提供物理位移。网络中每个输出端口的最后一个阶段包括改变至少一个光束的偏振的偏振旋转器的阵列，使得两个光束成为正交极化。最后，偏振相关的路由元件（例如，双折射元件）拦截两个正交偏振光束，并将其复合到所选择的输出端口处。

7. 发明授权

US06353467B1 Acute twist nematic (ATN) liquid crystal device for optical communication applications 失效
标题翻译：用于光通信应用的急转向向（ATN）液晶装置
公开(公告)号：US06353467B1
公开(公告)日：2002-03-05
申请号：US09417600
申请日：1999-10-14
申请人： Charles Wong , Yen-Chen Chen , Kuang-Yi Wu , Jian-Yu Liu
发明人： Charles Wong , Yen-Chen Chen , Kuang-Yi Wu , Jian-Yu Liu
IPC分类号： G09K1902
CPC分类号： G02F1/31 , G02F1/1396 , G02F2001/1398
摘要： A twisted nematic liquid crystal-based electro-optic modulator with a twist angle between 0° and 90°, and preferably between 50° and 80° is provided. The modulator provides a relatively rapid switching time such as less than about 50 milliseconds, and provides relatively large extinction ratios, such as greater than −25 dB. Preferably the liquid crystal entrance director differs from the polarization direction by a beta angle of about 15°.
摘要翻译：提供了扭转角在0°和90°之间，优选在50°和80°之间的扭曲向列型液晶型电光调制器。调制器提供相对较快的切换时间，例如小于约50毫秒，并提供相对较大的消光比，例如大于-25dB。优选地，液晶入射指示器与偏振方向不同约为15°的β角

8. 发明授权

US06288807B1 Optical wavelength router 失效
标题翻译：光波长路由器
公开(公告)号：US06288807B1
公开(公告)日：2001-09-11
申请号：US09659524
申请日：2000-09-12
申请人： Kuang-Yi Wu , Jian-Yu Liu
发明人： Kuang-Yi Wu , Jian-Yu Liu
IPC分类号： H04J1402
CPC分类号： H04J14/0289 , G02B6/272 , G02B6/29302 , G02B6/29386 , G02B6/29395 , G02F1/31 , H04J14/0201 , H04J14/0209 , H04J14/0212 , H04J14/0291 , H04J14/06 , H04Q11/0003 , H04Q11/0005 , 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, 2N optical signals in a WDM signal can be spatially separated and permuted using N control signals.
摘要翻译：一种具有多个级联级的可编程波长路由器，其中每个级接收包括多个波分复用（WDM）信道的一个或多个光信号。每个级将接收到的光信号划分成包括信道子集的分割光信号，并且响应于施加到每个级的控制信号对分割的光信号进行空间位置。每个级别优选地将接收的WDM信号划分为单个信道或WDM信号的两个子集。最终阶段在期望的位置输出光信号。以这种方式，WDM信号中的2N个光信号可以使用N个控制信号在空间上分离和置换。

9. 发明授权

US06285478B1 Programmable optical add/drop device 失效
标题翻译：可编程光分插装置
公开(公告)号：US06285478B1
公开(公告)日：2001-09-04
申请号：US09156211
申请日：1998-09-17
申请人： Jian-Yu Liu , Kuang-Yi Wu , Charles Wong
发明人： Jian-Yu Liu , Kuang-Yi Wu , Charles Wong
IPC分类号： H04J1406
CPC分类号： G02B6/29302 , G02B6/2713 , G02B6/272 , G02B6/2766 , G02B6/2773 , G02B6/2938 , G02B6/29383 , G02B6/29395 , H04J14/0208 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04J14/06 , H04Q11/0001 , H04Q11/0005 , H04Q2011/0009 , H04Q2011/0016 , H04Q2011/0024
摘要： An optical wavelength division multiplex (WDM) demultiplexer can be provided in substantially passive form. In one embodiment a wavelength filter separates alternate channels to provide a first output containing even-numbered channels and a second output containing odd-numbered channels, each output having channels separated by a bandwidth twice the channel separation bandwidth of the original WDM signal.
摘要翻译：光波分复用（WDM）解复用器可以以基本上被动的形式提供。在一个实施例中，波长滤波器分离交替通道以提供包含偶数通道的第一输出和包含奇数通道的第二输出，每个输出具有以原始WDM信号的通道分离带宽两倍的带宽分隔的通道。

10. 发明授权

US06275312B1 Optical routing switch 失效
标题翻译：光路由开关
公开(公告)号：US06275312B1
公开(公告)日：2001-08-14
申请号：US09416089
申请日：1999-10-12
申请人： Michael J. Derks , Kuang-Yi Wu , Jian-Yu Liu
发明人： Michael J. Derks , Kuang-Yi Wu , Jian-Yu Liu
IPC分类号： H04J1406
CPC分类号： G02F1/31 , G02B6/272 , G02B6/2766 , G02B6/2773 , H04Q11/0005 , H04Q2011/0024 , H04Q2011/0026 , H04Q2011/0035 , H04Q2011/0052
摘要： An optical routing switch employs a polarization-dependent routing (PDR) element formed by joining a plurality of prisms to form a substantially X-shaped interface between the prisms. A polarizing beam splitter (PBS) coating is applied to the interface, so that the interface transmits light having a first polarization along a transmitted optical path and reflects lights having a second, orthogonal polarization along a reflected optical path. A plurality of input/output ports are aligned to communicate optical signals along transmitted and reflected optical paths of the PDR element. Each input port has a birefringent element spatially separating the input optical signal into a pair of orthogonally-polarized beams, and a polarization rotator rotating the polarization of at least one of the pair of beams so that both beams have substantially the same polarization determined by the control state of the optical routing switch. Similarly, each output port has a polarization rotator that rotates the polarization of at least one of the pair of beams exiting the PDR element so that the beams have substantially orthogonal polarizations, and a birefringent element that combines the orthogonally-polarized beams into an output optical signal. Two PDR elements can be combined in an offset relationship to create a double ring add/drop switch or east/west protection switch.
摘要翻译：光路由交换机采用通过连接多个棱镜形成的偏振相关路由（PDR）元件，以在棱镜之间形成基本上X形的接口。将偏振分束器（PBS）涂层施加到界面，使得界面沿着透射光路透射具有第一偏振的光，并沿着反射光路反射具有第二正交偏振的光。对准多个输入/输出端口以沿着PDR元件的透射和反射光路传送光信号。每个输入端口具有将输入光信号空间分离成一对正交偏振光束的双折射元件，以及旋转该对光束中的至少一个光束的偏振的偏振旋转器，使得两个光束具有基本上相同的偏振光路由交换机的控制状态。类似地，每个输出端口具有偏振旋转器，该偏振旋转器旋转离开PDR元件的一对光束中的至少一个的偏振，使得光束具有基本正交的偏振，以及将正交偏振光束组合成输出光学的双折射元件信号。两个PDR元件可以以偏移关系组合，以创建双环加/减开关或东/西保护开关。

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