公开(公告)号：US07154659B1

公开(公告)日：2006-12-26

申请号：US10418712

申请日：2003-04-17

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

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

IPC: G02F1/09 ,  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.

公开(公告)号：US06937798B1

公开(公告)日：2005-08-30

申请号：US10759522

申请日：2004-01-15

Applicant: X. Steve Yao ,  Yongqiang Shi

Inventor： X. Steve Yao ,  Yongqiang Shi

IPC: G02B6/34 ,  G02B6/26

CPC classification number: G02B6/29349 ,  G01J9/0246 ,  G01J2009/023 ,  G02B6/29385

Abstract: Devices and techniques for monitoring spectrum of light. For example, a fiber spectral monitoring device and associated technique are described for monitoring spectral information in light based on an interferometer design.

Abstract translation: 用于监测光谱的装置和技术。 例如，描述了用于基于干涉仪设计来监视光的光谱信息的光纤监测设备和相关技术。

公开(公告)号：USRE38735E1

公开(公告)日：2005-05-17

申请号：US10002947

申请日：2001-10-31

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, as 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，作为索引开关可变延迟装置和梯形结构可变装置级联以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：US06628850B1

公开(公告)日：2003-09-30

申请号：US09683792

申请日：2002-02-14

Applicant: X. Steve Yao

Inventor： X. Steve Yao

IPC: G02F1295

CPC classification number: G02B6/124 ,  G02F1/0115 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/506 ,  H04J14/02

Abstract: Techniques and devices for modulating an optical signal transmitting through an optical waveguide such as a fiber and a planar waveguide by dynamically controlling an adjustable grating formed in a cladding layer of the waveguide.

Abstract translation: 通过动态地控制形成在波导的包层中的可调光栅来调制通过诸如光纤和平面波导的光波导传输的光信号的技术和装置。

公开(公告)号：US06594061B2

公开(公告)日：2003-07-15

申请号：US09879795

申请日：2001-06-11

Applicant: Shouhua Huang ,  Meirong Tu ,  X. Steve Yao

Inventor： Shouhua Huang ,  Meirong Tu ,  X. Steve Yao

IPC: G02F101

CPC classification number: G02F1/0123 ,  H01S5/0265 ,  H01S5/06832 ,  H04B10/503 ,  H04B10/50577 ,  H04B10/58

Abstract: Techniques for reducing frequency shifts in an oscillating frequency of an opto-electronic oscillator by having at least two separate optical delay elements in an optical portion of an opto-electronic feedback loop.

公开(公告)号：US5978125A

公开(公告)日：1999-11-02

申请号：US564920

申请日：1995-11-30

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 ,  G02F1/01 ,  H01Q15/18 ,  H01Q15/246 ,  G02B6/2861 ,  G02F2201/20

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/cm.sup.2. 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。 该装置本身是二维的，并且具有超过25线/ cm2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。