公开(公告)号：US5561726A

公开(公告)日：1996-10-01

申请号：US523723

申请日：1995-09-05

Applicant: X. Steve Yao

Inventor： X. Steve Yao

IPC: G01J4/00 ,  G02B6/10 ,  G02F1/01 ,  G02B6/00 ,  G02B5/20

CPC classification number: G01J4/00 ,  G02B6/105 ,  G02F1/0134 ,  G02F1/0136 ,  G02F2203/07

Abstract: A fiber optic apparatus for controlling the polarization state of light, for connecting polarization sensitive devices, and for providing a controlled variable attenuation in a fiber optic system. The center portion of a strand of optical fiber is placed in a rotatable fiber squeezer and is squeezed to produce a birefringent medium having a birefringent axis in the direction of squeezing pressure and the magnitude of the birefringence is controlled by the amount of pressure imposed by the fiber squeezer on the fiber center portion. Rotating the squeezer causes the birefringent axis to change and hence changes the polarization of light passing through the fiber strand. A desired polarization state is obtained by controlling the squeezing pressure and the rotation angle of the fiber squeezer. To use this apparatus to connect two polarization sensitive devices, simply place this apparatus between the two devices and adjust the pressure and orientation of the fiber squeezer until a desired polarization state for the receiving device is obtained. To use this apparatus to control the attenuation of light, simply connect a device having polarization dependent transmission to the output of this apparatus and adjust the pressure and orientation of the fiber squeezer until a desired attenuation is achieved.

Abstract translation: 一种用于控制光的偏振态的光纤装置，用于连接偏振敏感器件，并用于在光纤系统中提供受控的可变衰减。 将光纤束的中心部分放置在可旋转的纤维挤压机中并被挤压以产生在挤压压力方向上具有双折射轴的双折射介质，并且双折射的大小由所施加的压力的量控制 纤维挤压机在纤维中心部分。 旋转挤压机会导致双折射轴改变，从而改变穿过纤维束的光的偏振。 通过控制纤维挤压机的挤压力和旋转角来获得期望的极化状态。 为了使用这种装置来连接两个偏振敏感器件，简单地将该装置放置在两个器件之间，并且调整光纤挤压器的压力和取向，直到获得用于接收装置的期望的极化状态。 为了使用这种装置来控制光的衰减，简单地将具有偏振相关传输的装置连接到该装置的输出端，并且调整光纤压缩器的压力和取向直至实现所需的衰减。

公开(公告)号：US07796894B1

公开(公告)日：2010-09-14

申请号：US10903240

申请日：2004-07-30

Applicant: X. Steve Yao

Inventor： X. Steve Yao

IPC: H04B10/00

CPC classification number: H04B10/2569

Abstract: This application describes devices and techniques for dynamically controlling polarization light at one or more locations along the optical transmission path to reduce optical noise and PMD in the optical signal. One device according to an implementation includes a polarization controller to receive an optical signal and operable to control polarization of the optical signal in response to a control signal, a fixed optical polarizer to receive output from the optical polarization controller and to produce an output optical signal, and a circuit to receive a fraction of the output optical signal from the fixed optical polarizer and operable to produce the control signal in response to an output power level of the output optical signal which controls the polarization controller to maximize the output power level.

Abstract translation: 该应用描述了用于在光传输路径的一个或多个位置处动态控制偏振光的装置和技术，以减少光信号中的光噪声和PMD。 根据实现的一个设备包括：偏振控制器，用于接收光信号并且可操作以响应于控制信号控制光信号的偏振;固定光偏振器，用于接收来自光偏振控制器的输出并产生输出光信号 以及电路，用于接收来自固定光学偏振器的输出光信号的一部分，并且可操作以响应于控制偏振控制器以输出功率电平最大化的输出光信号的输出功率电平产生控制信号。

公开(公告)号：US07724435B1

公开(公告)日：2010-05-25

申请号：US11758614

申请日：2007-06-05

Applicant: Lianshan Yan ,  X. Steve Yao

Inventor： Lianshan Yan ,  X. Steve Yao

IPC: G02B27/28

CPC classification number: G02B6/29395 ,  G02B6/2713 ,  G02B6/274 ,  G02B6/278

Abstract: Devices and their operations to use multiple adjustable differential group delay (DGD) elements in various applications including tunable PMD emulators and compensators for producing different PMD profiles with an adjustable average DGD value.

Abstract translation: 设备及其操作在各种应用中使用多个可调差分组延迟（DGD）元件，包括可调PMD仿真器和补偿器，用于生成具有可调平均DGD值的不同PMD配置文件。

公开(公告)号：US20090213453A1

公开(公告)日：2009-08-27

申请号：US12427694

申请日：2009-04-21

Applicant: X. Steve Yao

Inventor： X. Steve Yao

IPC: G02F1/29

CPC classification number: G01M11/337

Abstract: Devices and techniques that use a polarization controller and a feedback control to the polarization controller to systematically control the polarization of light output from the polarization controller in measuring the polarization dependent loss (PDL) of an optical device or material that receives the light from the polarization controller or the degree of polarization (DOP) of a light beam directed into the polarization controller.

Abstract translation: 使用偏振控制器和对偏振控制器的反馈控制的装置和技术，用于系统地控制从偏振控制器输出的光的偏振，以测量接收来自偏振的光的光学装置或材料的偏振相关损耗（PDL） 控制器或引导到偏振控制器的光束的偏振度（DOP）。

公开(公告)号：US07535639B2

公开(公告)日：2009-05-19

申请号：US11616264

申请日：2006-12-26

Applicant: X. Steve Yao ,  Jane Chen ,  Yongqiang Shi

Inventor： X. Steve Yao ,  Jane Chen ,  Yongqiang Shi

IPC: G02B5/30

CPC classification number: G02B27/283 ,  G02B6/272 ,  G02B6/278 ,  G02B6/2786 ,  G02B27/286 ,  G02F1/0136 ,  G02F1/09 ,  G02F2001/0139

Abstract: Techniques and devices for depolarizing light and producing a variable differential group delays in optical signals. In one implementation, an input optical beam is split into first and second beams with orthogonal polarizations. One or two optical reflectors are then used to cause the first and second optical beams to undergo different optical path lengths before they are recombined into a single output beam. An adjustment mechanism may used implemented to adjust the difference in the optical path lengths of the first and second beams to produce a variable DGD. When the depolarization of light is desired, the difference in the optical path lengths of the first and second beams is set to be greater than the coherence length of the input optical beam.

Abstract translation: 用于去光偏振并产生光信号中的可变差分组延迟的技术和装置。 在一个实现中，输入光束被分成具有正交偏振的第一和第二光束。 然后使用一个或两个光反射器来使第一和第二光束在被重新组合成单​​个输出光束之前经历不同的光程长度。 可以使用调整机构来调整第一和第二光束的光程长度的差异以产生可变DGD。 当需要光的去极化时，第一和第二光束的光程长度的差被设定为大于输入光束的相干长度。

公开(公告)号：US07343100B2

公开(公告)日：2008-03-11

申请号：US11140456

申请日：2005-05-27

Applicant: X. Steve Yao

Inventor： X. Steve Yao

IPC: H04B10/00

CPC classification number: H04J14/06

Abstract: This application describes techniques for optical multiplexing and demultiplexing in optical communication systems based on polarization multiplexing of different signal channels.

Abstract translation: 本申请描述了基于不同信号信道的偏振复用的光通信系统中的光复用和解复用技术。

公开(公告)号：USRE38809E1

公开(公告)日：2005-10-04

申请号：US10005745

申请日：2001-11-02

Applicant: X. Steve Yao

Inventor： X. Steve Yao

IPC: G02B6/28 ,  G02F1/01 ,  G02F1/03 ,  G02F1/29 ,  H01Q3/26 ,  H01Q15/18 ,  H01Q15/24

CPC classification number: H01Q3/2682 ,  G02B6/2861 ,  G02F1/01 ,  G02F2201/20 ,  H01Q15/18 ,  H01Q15/246

Abstract: Optical variable delay devices for providing variable true time delay to multiple optical beams simultaneously. A ladder-structured variable delay device comprises multiple basic building blocks stacked on top of each other resembling a ladder. Each basic building block has two polarization beamsplitters and a polarization rotator array arranged to form a trihedron; Controlling an array element of the polarization rotator array causes a beam passing through the array element either going up to a basic building block above it or reflect back towards a block below it. The beams going higher on the “ladder” experience longer optical path delay. An index-switched optical variable delay device comprises of many birefringent crystal segments connected with one another, with a polarization rotator array sandwiched between any two adjacent crystal segments. An array element in the polarization rotator array controls the polarization state of a beam passing through the element, causing the beam experience different refractive indices or path delays in the following crystal segment. By independently control each element in each polarization rotator array, variable optical path delays of each beam can be achieved. Finally, an index-switched variable delay device and a ladder-structured variable device are cascaded to form a new device which combines the advantages of the two individual devices. This programmable optic device has the properties of high packing density, low loss, easy fabrication, and virtually infinite bandwidth. The device is inherently two dimensional and has a packing density exceeding 25 lines/cm2. The delay resolution of the device is on the order of a femtosecond (one micron in space) and the total delay exceeds 10 nanosecond. In addition, the delay is reversible so that the same delay device can be used for both antenna transmitting and receiving.

Abstract translation: 光学可变延迟装置，用于同时向多个光束提供可变的真实时间延迟。 梯形结构的可变延迟装置包括堆叠在彼此顶部的类似梯子的多个基本构建块。 每个基本构建块具有两个偏振分束器和设置成形成三面体的偏振旋转器阵列; 控制偏振旋转器阵列的阵列元件使得光束通过阵列元件，直到其上方的基本构建块或反射回其下方的块。 “梯子”上的光束越高，光路延迟越长。 折射率切换光学可变延迟器件包括许多彼此连接的双折射晶体段，其中偏振旋转器阵列夹在任何两个相邻晶体段之间。 偏振旋转器阵列中的阵列元件控制通过元件的光束的偏振状态，使得光束在随后的晶体段中经历不同的折射率或路径延迟。 通过独立地控制每个偏振旋转器阵列中的每个元件，可以实现每个光束的可变光程延迟。 最后，级联索引切换可变延迟装置和梯形结构可变装置，形成结合两个单独装置的优点的新装置。 该可编程光学器件具有高封装密度，低损耗，易于制造和几乎无限带宽的特性。 该装置本质上是二维的，并且具有超过25线/厘米2的包装密度。 器件的延迟分辨率为飞秒级（空间为1微米），总延迟超过10纳秒。 此外，延迟是可逆的，使得相同的延迟装置可以用于天线发射和接收两者。

公开(公告)号：US06754404B2

公开(公告)日：2004-06-22

申请号：US10316633

申请日：2002-12-10

Applicant: X. Steve Yao

Inventor： X. Steve Yao

IPC: G02B600

CPC classification number: G02F1/0136 ,  G02B6/274

Abstract: Implementations of a polarization control method and apparatus are provided. In one implementation, a device uses super-polished squeezing surfaces to apply pressure against a polyimide coated fiber thereby minimizing micro-bending effects that cause losses in the fiber. Special control circuitry may be used to maintain a driving source of piezo-electrics that control the squeezing surfaces at a resonant frequency, thereby minimizing the voltages needed to drive the piezo-electrics.

Abstract translation: 提供了偏振控制方法和装置的实现。 在一个实施方案中，设备使用超抛光挤压表面对聚酰亚胺涂覆的纤维施加压力，从而最小化引起纤维损失的微弯曲效应。 可以使用特殊控制电路来保持压电表面的驱动源，以便以共振频率控制挤压表面，从而最小化驱动压电所需的电压。

公开(公告)号：US07265837B1

公开(公告)日：2007-09-04

申请号：US10757027

申请日：2004-01-13

Applicant: X. Steve Yao

Inventor： X. Steve Yao

IPC: G01J4/00

CPC classification number: G01J4/04 ,  G02F1/0136

Abstract: Techniques and devices for monitoring polarization of light using at least two polarization elements where the difference between the outputs of the two polarization elements are used to monitor a change in polarization.

Abstract translation: 使用至少两个偏振元件来监测光的偏振的技术和装置，其中两个偏振元件的输出之间的差被用于监测极化的变化。

公开(公告)号：US07218436B2

公开(公告)日：2007-05-15

申请号：US11149946

申请日：2005-06-10

Applicant: X. Steve Yao

Inventor： X. Steve Yao

IPC: G02F1/03 ,  G01J4/00

CPC classification number: G01J4/00 ,  G01N21/21 ,  G01N21/23 ,  G02B6/2713 ,  G02B6/2766 ,  G02B6/29311 ,  G02B6/29358 ,  G02B27/28 ,  G02F1/0136

Abstract: Devices and techniques for generating and analyzing states of polarization in light using multiple adjustable polarization rotators in various applications.

Abstract translation: 用于在各种应用中使用多个可调偏振旋转器在光中产生和分析偏振状态的装置和技术。