利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

52 条记录 (耗时 0.031 秒)

    N x M optical wavelength routing switch
    21.
    发明授权
    N x M optical wavelength routing switch 失效
    N×M光波长路由交换机

    公开(公告)号：US6097518A

    公开(公告)日：2000-08-01

    申请号：US37937

    申请日：1998-03-10

    申请人： Kuang-Yi Wu ,  Jian-Yu Liu

    发明人： Kuang-Yi Wu ,  Jian-Yu Liu

    IPC分类号： G02F1/313 ,  G02B6/34 ,  G02F1/31 ,  H04B10/02 ,  H04J14/00 ,  H04J14/02 ,  H04Q3/52 ,  H04Q11/00

    CPC分类号： G02B6/272 ,  G02B6/29302 ,  G02B6/29395 ,  G02F1/31 ,  H04Q11/0001 ,  H04Q11/0003 ,  H04Q11/0005 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0219 ,  H04Q2011/0026 ,  H04Q2011/0032 ,  H04Q2011/0035

    摘要： A switchable wavelength router switches wavelength division multiplexed (WDM) optical signals between N input ports and M output ports. Each WDM signal is spatially decomposed into N pairs of orthogonally polarized beams by a polarization-dependent routing element, such as a birefringent element. A polarization rotator array rotates the polarization of each beam pair so that both beams in each pair have the same polarization. A wavelength filter then demultiplexes each beam pair to create N sets of four beams, such that the first beam in each pair decomposes into third and fourth orthogonally-polarized beams, and the second beam in each pair decomposes into fifth and sixth orthogonally-polarized beams. The third and fifth beams carry a first spectral band at a first polarization, and the fourth and sixth beams carry a second complementary spectral band at an orthogonal polarization. A second polarization-dependent routing element spatially routes the four beams in each of the N sets based on their polarizations, and also spatially combines selected beam pairs from different sets to produce M pairs of beams. A second polarization rotator array restores each beam pair to orthogonal polarization, and a final polarization-dependent routing element recombines each beam pair to produce M output beams at the output ports.

    摘要翻译： 可切换波长路由器在N个输入端口和M个输出端口之间切换波分复用（WDM）光信号。 每个WDM信号通过偏振相关的路由元件（例如双折射元件）被空间分解为N对正交偏振光束。 偏振旋转器阵列旋转每个光束对的偏振，使得每对中的两个光束具有相同的偏振。 波长滤波器然后对每个波束对进行解复用以产生N组四个波束，使得每对波束中的第一波束分解成第三和第四正交偏振光束，并且每对波束中的第二波束分解成第五和第六正交偏振光束 。 第三和第五波束在第一极化处携带第一光谱带，并且第四和第六波束在正交极化处携带第二互补光谱带。 第二偏振相关路由元件基于它们的偏振空间地路由N组中的每一个中的四个波束，并且还将来自不同组的所选波束对空间组合以产生M对波束。 第二偏振旋转器阵列将每个波束对恢复为正交偏振，并且最终的偏振相关路由元件将每个波束对重新组合以在输出端口处产生M个输出波束。

    N+M digitally programmable optical routing switch
    22.
    发明授权
    N+M digitally programmable optical routing switch 失效

    公开(公告)号：US6049404A

    公开(公告)日：2000-04-11

    申请号：US63611

    申请日：1998-04-21

    申请人： Kuang-Yi Wu ,  Jian-Yu Liu

    发明人： Kuang-Yi Wu ,  Jian-Yu Liu

    IPC分类号： G02F1/13 ,  G02B6/34 ,  G02F1/31 ,  H04B10/02 ,  H04B10/28 ,  H04Q11/00 ,  H04B10/00

    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.

    Optical add/drop wavelength switch
    24.
    发明授权
    Optical add/drop wavelength switch 有权
    光分插波长开关

    公开(公告)号：US06600582B1

    公开(公告)日：2003-07-29

    申请号：US09715603

    申请日：2000-11-17

    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： 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.

    摘要翻译： 光学分插波长开关可从桥接状态可控地改变，其中输出与输入相同。 波分复用（WDM）输入和加/减状态，其中输入到加法端口的信号被替代WDM输入的特定波长子范围，WDM输入的其它波长保持不变。 在一个实施例中，WDM信号的波长子范围被给予与WDM的其它波长不同的极化，例如通过使用堆叠波片或其它滤光器或偏振鉴别器。 不同极化的波长可以在空间上分离，例如。 通过双折射元件或偏振分束器，优选地以位控制的方式，例如通过使用液晶或其它偏振控制器。 极化控制器和鉴别器可以类似地用于可选地对准或组合加法信号与子范围外部的WDM信号的部分。 可以使用加/减波长开关，例如。 在光学令牌环网络中和/或组成光学交叉开关用于交换任何任意可指定的信道，例如， 在多个多通道光纤中。

    Optical wavelength add/drop multiplexer
    25.
    发明授权
    Optical wavelength add/drop multiplexer 失效
    光波分复用器

    公开(公告)号：US06545783B1

    公开(公告)日：2003-04-08

    申请号：US09273920

    申请日：1999-03-22

    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： H04Q11/0005 ,  G02B6/29361 ,  G02B6/29383 ,  G02F1/31 ,  H04J14/0206 ,  H04J14/0208 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0221 ,  H04Q11/0003 ,  H04Q2011/0009 ,  H04Q2011/0016 ,  H04Q2011/0024 ,  H04Q2011/0026 ,  H04Q2011/0032 ,  H04Q2011/0035

    摘要： An optical wavelength add/drop multiplexer provides communications between two optical links supporting wavelength division multiplexing (WDM). A wavelength slicer spatially separates the input signal into two sets of channels. An optical filter, such as an interference filter, spatially separates the a subset of the input channels into an array of separated channels. A programmable optical add/drop switch array selectively routes channels from an array of input ports to an array of drop ports, substitutes channels from an array of add ports in place of the dropped channels, and routes the remaining input channels and added channels to an array of output ports. The channels from the output ports of the said add/drop switch array are then combined and transmitted into the second optical link. A network of wavelength slicers can be used to spatially separate the input signal into a larger number of sets of channels that can either be accessed by a number of add/drop switch arrays, or passed unchanged as “express lanes” to the second optical link. In an alternative embodiment, a circulated drop filter consisting of an optical circulator and a series of fiber Bragg gratings is used to select a predetermined series of input channels to be processed by the add/drop switch array, with the remaining channels being passed by the circulated drop filter as express lanes.

    摘要翻译： 光波分复用器提供支持波分复用（WDM）的两个光链路之间的通信。 波长限幅器将输入信号空间分离成两组通道。 诸如干涉滤波器的光学滤波器将输入通道的子集在空间上分离成分离的通道的阵列。 可编程光分插开关阵列选择性地将输入端口阵列的信道路由到分支端口阵列，替代来自添加端口阵列的信道来代替丢弃的信道，并将剩余的输入信道和添加的信道路由到 输出端口阵列。 然后将来自所述分插开关阵列的输出端口的信道组合并发送到第二光链路。 可以使用波长限幅器的网络将输入信号空间分离成更多数量的信道组，其可以被多个添加/分接开关阵列访问，或者作为“快速通道”不变地传送到第二光链路 。 在替代实施例中，使用由光循环器和一系列光纤布拉格光栅组成的循环下降滤波器来选择要由加/减开关阵列处理的预定系列输入通道，其余通道由 循环滴液过滤器作为快车道。

    Optical routing switch using symmetric liquid crystal cells
    26.
    发明授权
    Optical routing switch using symmetric liquid crystal cells 失效
    光路由开关采用对称液晶单元

    公开(公告)号：US06519022B1

    公开(公告)日：2003-02-11

    申请号：US09621634

    申请日：2000-07-21

    申请人： Ming Xu ,  Chongchang Mao ,  Kuang-Yi Wu ,  Jian-Yu Liu

    发明人： Ming Xu ,  Chongchang Mao ,  Kuang-Yi Wu ,  Jian-Yu Liu

    IPC分类号： G02F113

    CPC分类号： H04Q11/0005 ,  G02B6/272 ,  G02B6/2766 ,  G02F1/13471 ,  G02F1/31 ,  H04J14/0212 ,  H04Q2011/0024 ,  H04Q2011/0026 ,  H04Q2011/0035 ,  H04Q2011/0039 ,  H04Q2011/0052

    摘要： An optical routing switch uses two liquid crystal cells that can produce offsetting rotations of the polarization of the input beam to provide fast, symmetrical switching. The input beam is first polarized and then passes through both liquid crystal cells in series. Both liquid crystal cells have two states (e.g., voltage-off and voltage-on) in which the beam polarization is rotated by predetermined angles (e.g., 0° and 90°), but in opposing rotational directions. A controller selectively rotates the LC cells through a sequence of steps, beginning with a “through” state in which both LC cells are in the first state. The polarization rotations provided by both liquid crystal cells offset one another so the beam polarization remains essentially unchanged. The LC cells can be rapidly switched to a “cross” state in which only one of the LC cells is changed to the second state and the polarization of the beam is rotated by a predetermined degree. The LC cells can then be rapidly switched back to the through state by changing both LC cells to their second state. Once again, the LC cells offset one another so that the beam polarization remains essentially unchanged. While remaining in the through state, both LC cells are allowed to return to the first state to complete the cycle. Both LC cells relax at the same rate and their offsetting polarization rotations cause the beam polarization to remain unchanged throughout the entire relaxation process. A polarization-dependent routing element (e.g., a polarized beamsplitter or birefringent element) routes the beam exiting the LC cells along either of two alternative optical paths based on the beam's polarization.

    摘要翻译： 光路由开关使用两个液晶单元，其可以产生输入光束的偏振的偏移旋转，以提供快速，对称的切换。 输入光束首先被偏振，然后串联通过两个液晶单元。 两个液晶单元都具有其中光束偏振以预定角度（例如，0°和90°）旋转但在相反的旋转方向上的两种状态（例如，电压关闭和电压开启）。 控制器通过一系列步骤选择性地旋转LC单元，从两个LC单元处于第一状态的“通”状态开始。 由两个液晶单元提供的偏振旋转彼此偏移，使得光束偏振基本保持不变。 LC单元可以快速切换到“交叉”状态，其中仅一个LC单元被改变到第二状态，并且波束的偏振旋转预定的程度。 然后可以通过将两个LC单元改变到它们的第二个状态来将LC单元迅速地切换回到通过状态。 再次，LC单元彼此偏移，使得光束偏振基本保持不变。 当保持在通过状态时，允许两个LC单元返回到第一状态以完成循环。 两个LC单元以相同的速率松弛，并且它们的偏移偏振旋转导致光束偏振在整个弛豫过程中保持不变。 基于偏振相关的路由元件（例如，偏振分束器或双折射元件）基于光束的偏振来沿着两个备选光路中的任一个路由离开LC单元的光束。

    Temperature insensitive polarization filter
    28.
    发明授权
    Temperature insensitive polarization filter 失效
    温度不敏感的偏振滤波器

    公开(公告)号：US06510004B1

    公开(公告)日：2003-01-21

    申请号：US09020706

    申请日：1998-02-09

    申请人： Kuang-Yi Wu ,  Jian-Yu Liu

    发明人： Kuang-Yi Wu ,  Jian-Yu Liu

    IPC分类号： G02B2728

    CPC分类号： G02B27/288

    摘要： A temperature insensitive polarization filter is made by inter-digitally stacking two different types of birefringent elements having positive and negative thermal coefficients. This results in a net cancellation of the positive and negative thermal coefficients of the birefringent elements within the filter. The optical retardance of each type of birefringent element changes by an almost equal amount as the operating temperature changes, with one type of element shifting toward a larger optical retardance and the other type of element shifting toward a smaller optical retardance. However, the total retardance remains essentially constant. This assures that the filter can operate over a wide temperature range without shifting its spectral response.

    摘要翻译： 温度不敏感的偏振滤光器是通过数位式堆叠具有正和负热系数的两种不同类型的双折射元件制成的。 这导致滤波器内的双折射元件的正和负热系数的净消除。 每种类型的双折射元件的光学延迟性随着工作温度的变化而变化几乎相等的量，其中一种类型的元件向更大的光学延迟转移，另一种类型的元件向更小的光学延迟转移。 然而，总延迟基本保持恒定。 这确保了滤波器可以在宽的温度范围内工作，而不会改变其光谱响应。

    Dynamic gain equalizer for optical amplifiers
    29.
    发明授权
    Dynamic gain equalizer for optical amplifiers 失效
    用于光放大器的动态增益均衡器

    公开(公告)号：US06429962B1

    公开(公告)日：2002-08-06

    申请号：US09730650

    申请日：2000-12-05

    申请人： Ming Xu ,  Tizhi Huang ,  Chongchang Mao ,  Jian-Yu Liu ,  Kuang-Yi Wu ,  Charles Wong

    发明人： Ming Xu ,  Tizhi Huang ,  Chongchang Mao ,  Jian-Yu Liu ,  Kuang-Yi Wu ,  Charles Wong

    IPC分类号： H04B1012

    CPC分类号： H04B10/2941 ,  G02F1/0136 ,  G02F1/13471 ,  G02F2203/05 ,  G02F2203/48 ,  H01S3/06754 ,  H01S3/10023 ,  H01S2301/04

    摘要： An optical equalizer for use primarily with an erbium-doped fiber amplifier has an initial polarizer that convert the input beam to a predetermined polarization, followed by a series of dynamically-adjustable sinusoidal filters that provide attenuation as a sinusoidal function of beam wavelength. Each of the sinusoidal filters has a first liquid crystal cell adjustably rotating the polarization of the beam from the preceding polarizer. This is followed by a second optical element that retards the beam as a sinusoidal function of beam wavelength. For example, the second optical element can be a birefringent crystal that provided a fixed degree of retardance to the beam and a second liquid crystal cell that provides a variable degree of retardance, thereby allowing adjustment of the center frequency of the sinusoidal function. Finally, a third liquid crystal cell adjustably rotates the polarization of the beam. A final polarizer provides amplitude control of the beam based on the polarization rotations introduced by the first and third liquid crystal cells. A controller provides control signals to the liquid crystal cells of each sinusoidal filter so that their combined sinusoidal attenuation functions produce a desired equalization curve.

    摘要翻译： 主要用于掺铒光纤放大器的光学均衡器具有将输入光束转换为预定偏振的初始偏振器，随后是一系列动态可调的正弦滤波器，其提供作为波束波长的正弦函数的衰减。 每个正弦滤波器具有第一液晶单元，其可调节地使来自前一偏振器的光束的偏振旋转。 其后是第二光学元件，其将光束延迟为波束波长的正弦函数。 例如，第二光学元件可以是对光束提供固定的延迟度的双折射晶体和提供可变延迟的第二液晶单元，从而允许调整正弦函数的中心频率。 最后，第三液晶单元可调整地使光束的偏振旋转。 最终的偏振器基于由第一和第三液晶单元引入的偏振旋转来提供光束的幅度控制。 控制器向每个正弦滤波器的液晶单元提供控制信号，使得其组合的正弦衰减函数产生期望的均衡曲线。