公开(公告)号：WO9935518A3

公开(公告)日：2000-02-10

申请号：PCT/US9900121

申请日：1999-01-04

Applicant: CHORUM TECHNOLOGIES INC

Inventor： WONG CHARLES ,  CHEN YEN-CHEN ,  WU KUANG-YI ,  LIU JIAN-YU

IPC: G02F1/137 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/139 ,  G02F1/31

CPC classification number: G02F1/31 ,  G02F1/1396 ,  G02F2001/1398

Abstract: A twisted nematic liquid crystal-based electro-optic modulator with a twist angle between 0 DEG and 90 DEG , and preferably between 50 DEG and 80 DEG 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 (216) differs from the polarization direction (222) by a beta angle of about 15 DEG .

Abstract translation: 提供扭转角度在0°至90°之间，优选在50°至80°之间的扭转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，液晶入口导向器（216）与偏振方向（222）不同约15°的β角。

公开(公告)号：WO0075711A2

公开(公告)日：2000-12-14

申请号：PCT/US0015430

申请日：2000-06-02

Applicant: CHORUM TECHNOLOGIES INC

Inventor： WU KUANG-YI ,  LIU JIAN-YU ,  DERKS MICHAEL ,  YUAN SHIFU

IPC: G02B6/34 ,  H04J14/02 ,  H04Q11/00 ,  G02B26/00

CPC classification number: G02B6/272 ,  G02B6/2766 ,  G02B6/29361 ,  G02B6/29383 ,  G02B6/29395 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0221 ,  H04Q11/0005 ,  H04Q2011/0026 ,  H04Q2011/0035 ,  H04Q2011/0039 ,  H04Q2011/0043 ,  H04Q2011/0049

Abstract: A regulating add/drop optical switch controls the switching and output power levels by manipulating signals to polarization modulators. At each input port, the beam is separated into horizontal and vertically polarized components of the light wave. One beam is shifted and the resulting like polarized beams pass through a polarization modulator that controllably rotates polarization to a selected extend to determine whether horizontal or vertical polarization will predominate. If horizontal, the beams pass through a polarization beam separator without deflection. If vertical the beams are reflected. The beams pass through an additional polarization controller to determine if they are to be directed to one of the output ports or dissipated. If selected for output, the beams are collimated before they are launched. A wavelength-selective interference filter allows the present invention to function as a fully configurable n-channel add/drop multiplexer.

Abstract translation: 调节加/减光开关通过将信号操纵到偏振调制器来控制开关和输出功率电平。 在每个输入端口，光束被分离成光波的水平和垂直极化分量。 一个光束被移动，并且所得到的相似的偏振光束通过偏振调制器，该偏振调制器可控制地将偏振旋转到选定的延伸，以确定水平或垂直偏振将占主导。 如果水平，则光束通过偏振光束分离器而没有偏转。 如果垂直梁反射。 光束通过附加的偏振控制器以确定它们是否被引导到输出端口之一或消散。 如果选择输出，则在启动光束之前对其进行准直。 波长选择性干扰滤波器允许本发明用作完全可配置的n信道分插复用器。

公开(公告)号：WO0035105A2

公开(公告)日：2000-06-15

申请号：PCT/US9926545

申请日：1999-11-10

Applicant: CHORUM TECHNOLOGIES INC

Inventor： LIU JIAN-YU ,  WU KUANG-YI

IPC: G02B6/34 ,  G02F1/31 ,  H04B10/00 ,  H04B10/02 ,  H04B10/28 ,  H04J14/00 ,  H04J14/02 ,  H04Q11/00 ,  H04B

CPC classification number: 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

Abstract: A system for dealing with faults in wavelength division multiplexed (WDM) optical communications between two terminals (1, 2) connected by at least two optical fibers (11, 12) monitors the status of communications over both optical fibers. If both optical fibers (11, 12) are operating normally, a first set of channels is routed over the first optical fiber (11) and a second set of channels (which is mutually exclusive of the first set of channels) is routed over the second optical fiber (12). However, if a fault is detected in either optical fiber (11, 12), the first terminal (1) combines the first and second sets of channels and routes the combined channels over the remaining optical fiber to the second terminal (2). The second terminal (2) separates the combined channels to recreate the first and second sets of channels. Wavelength slicers (101-104) 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.

Abstract translation: 用于处理由至少两个光纤（11,12）连接的两个终端（1,2）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。 如果两根光纤（11,12）都正常工作，则第一组信道在第一光纤（11）上路由，并且第二组信道（其与第一组信道互斥）路由在第一组光纤 第二光纤（12）。 然而，如果在任一光纤（11,12）中检测到故障，则第一终端（1）组合第一组信道和第二组信道，并将组合的信道在其余的光纤上路由到第二终端（2）。 第二终端（2）分离组合的频道以重新创建第一和第二组频道。 波长限幅器（101-104）可用于复用和解复用两端的信道。 这种结构允许第一组和第二组通道间隔开。