公开(公告)号：US06515786B1

公开(公告)日：2003-02-04

申请号：US09922989

申请日：2001-08-03

申请人： Tiejun Xia ,  Chi-Hao Cheng ,  Shuxin Li ,  Jian-Yu Liu ,  Kuang-Yi Wu

发明人： Tiejun Xia ,  Chi-Hao Cheng ,  Shuxin Li ,  Jian-Yu Liu ,  Kuang-Yi Wu

IPC分类号： G02F103

CPC分类号： G02F1/313

摘要： An optical device comprises a first birefringent crystal having a first length, a second birefringent crystal having a second length, and a dynamic polarization rotator. An optical signal propagating through the first and second birefringent crystals has an effective optical path length based, at least in part, upon the first length of the first birefringent crystal and the second length of the second birefringent crystal. The dynamic polarization rotator adjusts the effective optical path length of the optical signal in response to a control signal.

摘要翻译： 光学装置包括具有第一长度的第一双折射晶体，具有第二长度的第二双折射晶体和动态偏振旋转器。 传播通过第一和第二双折射晶体的光信号具有至少部分地基于第一双折射晶体的第一长度和第二双折射晶体的第二长度的有效光程长度。 动态偏振旋转器响应于控制信号调节光信号的有效光程长度。

公开(公告)号：US06396609B1

公开(公告)日：2002-05-28

申请号：US09469336

申请日：1999-12-20

申请人： Chi-Hao Cheng ,  Jian-Yu Liu ,  Kuang-Yi Wu ,  Charles Wong

发明人： Chi-Hao Cheng ,  Jian-Yu Liu ,  Kuang-Yi Wu ,  Charles Wong

IPC分类号： H04B1000

CPC分类号： G02B6/272 ,  G02B6/2773 ,  G02B6/29302 ,  G02B6/29394 ,  H04B10/25133 ,  H04J14/02

摘要： A stacked waveplate device that performs an optical wavelength filtering function is described which provides dispersion with a first magnitude and a first sign for a first optical path having a first output polarization and which provides a second dispersion with a substantially equal but oppositely-signed dispersion for a second optical path defining an output having an orthogonal polarization to the polarization of said first output path. Optical paths are configured to pass through first and second stacked waveplate devices sequentially with the optical dispersion of said second device having an approximately equal magnitude but opposite sign compared to the optical dispersion of the first optical stacked waveplate devices so as to provide canceling or compensation of optical dispersion. A device is configured to use cancellation or compensation of dispersion in sequential stacked waveplate devices to provide outputs with characteristics similar to outputs of previous stacked waveplate devices but with substantially reduced dispersion characteristics.

摘要翻译： 描述了执行光学波长滤波功能的层叠波片装置，其为具有第一输出偏振的第一光路提供具有第一幅度和第一符号的色散，并且提供具有基本相等但相反符号色散的第二色散， 限定具有与所述第一输出路径的偏振正交偏振的输出的第二光路。 光路被配置成与第一光学叠层波片装置的光学色散相比，顺序地穿过第一和第二层叠波片装置，其中所述第二装置的光学色散与第一光学堆叠波片装置的光学色散相比具有大致相等的数量但相反的符号，以便提供 光学色散。 一种器件被配置为使用顺序层叠波片器件中的色散的消除或补偿来提供具有与先前堆叠波片器件的输出相似的特性的输出，但具有显着降低的色散特性。

公开(公告)号：US06559992B2

公开(公告)日：2003-05-06

申请号：US09728271

申请日：2000-12-01

申请人： Gan Zhou ,  Kuang-Yi Wu ,  Chi-Hao Cheng

发明人： Gan Zhou ,  Kuang-Yi Wu ,  Chi-Hao Cheng

IPC分类号： H04B1000

CPC分类号： G02B6/29394 ,  G02B6/29302 ,  G02B6/29349 ,  G02B6/29358 ,  H04J14/02

摘要： An interferometer receives an input optical signal and outputs a signal after changing at least the dispersion of said signal. At least portions of the interferometer are adjustable to adjust at least a first dispersion parameter. Examples of dispersion parameters which are adjustable include dispersion magnitude, center wavelengths and waveshapes or slopes. Preferably the dispersion in the output signal is substantially reduced or substantially eliminated, compared to the dispersion of the input signal. By providing for adjustability of one or more dispersion parameters, a dispersion compensator can be appropriately adjusted for use in a variety of applications.

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.

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。

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。

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。

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。

公开(公告)号：US06552833B2

公开(公告)日：2003-04-22

申请号：US09864538

申请日：2001-05-23

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： H04J1402

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。

公开(公告)号：US06545779B1

公开(公告)日：2003-04-08

申请号：US09625780

申请日：2000-07-26

申请人： Jian-Yu Liu ,  Kuang-Yi Wu

发明人： Jian-Yu Liu ,  Kuang-Yi Wu

IPC分类号： H04J1402

CPC分类号： H04J14/0289 ,  G02B6/272 ,  G02B6/29302 ,  G02B6/29361 ,  G02B6/29395 ,  G02B6/29397 ,  G02F1/31 ,  H04B10/032 ,  H04J14/0208 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0279 ,  H04J14/0283 ,  H04J14/0291 ,  H04Q11/0003 ,  H04Q11/0005 ,  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.

摘要翻译： 用于处理由至少两根光纤连接的两个终端之间的波分复用（WDM）光通信中的故障的系统监视两个光纤上的通信状态。 如果两个光纤正常工作，则第一组信道在第一光纤上路由，并且第二组信道（与第一组信道相互排斥）被路由在第二光纤上。 然而，如果在任一光纤中检测到故障，则第一终端组合第一和第二组信道，并将剩余光纤上的组合信道路由到第二终端。 第二终端分离组合的信道以重建第一和第二组信道。 波长限幅器可用于对两个端子的信道进行复用和解复用。 该架构允许第一组和第二组通道间隔开。