公开(公告)号：US06229934B1

公开(公告)日：2001-05-08

申请号：US09158000

申请日：1998-09-22

申请人： Paul Melman ,  Yingyin Zou ,  Hua Jiang ,  Feiling Wang ,  Jing Zhao

发明人： Paul Melman ,  Yingyin Zou ,  Hua Jiang ,  Feiling Wang ,  Jing Zhao

IPC分类号： G02B626

CPC分类号： G02B6/2848 ,  G02F1/31

摘要： The invention provides a fiber-optic 2×2 switch using a dual-fiber 50:50 input coupler and a dual-fiber 50:50 output coupler. One fiber from each coupler makes contact to an inner transparent electrode on a planar layer of electro-optic material and the other fibers make contact to an outer transparent electrode on the layer. The electro-optic layer has its other side coated with a transparent electrode which is placed in optical contact with one end of a GRIN lens. The fibers are arranged so that the inner fibers are at conjugate points and the outer fibers also at conjugate points of the lens. The other end of the lens is coated with a mirror. Applying a voltage between either the inner or outer electrode changes the optical path length for the light from and to the fibers traveling through the material under the selected electrode causing the light from the two input fibers to be switched between the two output fibers. 2×N switches can be constructed by concatenating 2×2 switches. The switch can also be used as a modulator. A convenient fiber alignment method is described.

摘要翻译： 本发明提供一种使用双光纤50:50输入耦合器和双光纤50:50输出耦合器的光纤2x2开关。 来自每个耦合器的一根光纤与电光材料的平面层上的内部透明电极接触，并且其它光纤与层上的外部透明电极接触。 电光层的另一侧涂有透明电极，该透明电极与GRIN透镜的一端放置成光学接触。 纤维布置成使得内纤维在共轭点处，外纤维也在透镜的共轭点处。 透镜的另一端涂有镜子。 在内部电极或外部电极之间施加电压改变来自穿过选定电极之下的材料的光的光路长度，从而使来自两个输入光纤的光在两个输出光纤之间切换。 2xN开关可以通过连接2x2开关构成。 开关也可以用作调制器。 描述了方便的光纤对准方法。

公开(公告)号：US06654105B2

公开(公告)日：2003-11-25

申请号：US10167121

申请日：2002-06-10

申请人： Feiling Wang ,  Xiao-Li Li ,  Yingyin Zou ,  Wei Hu

发明人： Feiling Wang ,  Xiao-Li Li ,  Yingyin Zou ,  Wei Hu

IPC分类号： G01N2100

CPC分类号： G02F1/0555 ,  G02F1/0136

摘要： A polarization mode dispersion center (306) measures PMD impairment through the cross-correlation of optical pulses. A second variable phase retarder plate (504) is oriented with polarization eigenstates at preferably 45 degree angle with respect to those eigenstates of a first variable phase retarder plate (502) to provide controllable phase retardations that can be varied and measured as an indication of PMD impairment.

摘要翻译： 偏振模色散中心（306）通过光脉冲的互相关来测量PMD损伤。 相对于第一可变相位延迟板（502）的本征态，第二可变相位延迟板（504）以偏振本征态优选成45度角定向，以提供可改变和测量的可控相位延迟作为PMD的指示 减值。

公开(公告)号：US06404537B1

公开(公告)日：2002-06-11

申请号：US09519293

申请日：2000-03-06

申请人： Paul Melman ,  Yingyin Zou ,  Qiushui Chen

发明人： Paul Melman ,  Yingyin Zou ,  Qiushui Chen

IPC分类号： G05F133

CPC分类号： G02F1/0555 ,  G02F1/0136

摘要： A polarization transformer includes at least one plate of transparent polycrystalline material which has an optical axis oriented perpendicular to a propagation direction of incident radiation having a first polarization state. The plate includes electrodes for applying an electric field across a plane of the plate perpendicular to the propagation direction so as to provide controlled phase change such that the polarization of radiation transmitted through the polarization transformer is transformed from the first polarization state to a second polarization state. The plate in a preferred embodiment comprises a ferroelectric complex oxide such as lead lanthanum zirconate titanate (PLZT) material. Such a material provides devices that have very fast response (on the order of microseconds) and low insertion loss.

摘要翻译： 偏振变换器包括至少一个透明多晶材料板，其具有垂直于具有第一偏振状态的入射辐射的传播方向定向的光轴。 板包括用于垂直于传播方向在平板平面上施加电场的电极，以便提供受控的相位变化，使得透过偏振变换器的辐射的偏振从第一偏振状态转变为第二偏振状态 。 优选实施例中的板包括铁电复合氧化物，例如锆钛酸铅镧（PLZT）材料。 这种材料提供了具有非常快的响应（微秒数量级）和低插入损耗的器件。

公开(公告)号：US07068688B2

公开(公告)日：2006-06-27

申请号：US10700934

申请日：2003-11-04

申请人： Yingyin Zou ,  Qiushui Chen ,  Run Zhang ,  Hua Jiang

发明人： Yingyin Zou ,  Qiushui Chen ,  Run Zhang ,  Hua Jiang

IPC分类号： H01S3/115

CPC分类号： H01S3/109 ,  H01S3/09415 ,  H01S3/115 ,  H01S3/1611 ,  H01S3/1673

摘要： An electro-optic Q-switch for generating sequence of laser pulses was disclosed. The Q-switch comprises a quadratic electro-optic material and is connected with an electronic unit generating a radio frequency wave with positive and negative pulses alternatively. The Q-switch is controlled by the radio frequency wave in such a way that laser pulse is generated when the radio frequency wave changes its polarity

摘要翻译： 公开了一种用于产生激光脉冲序列的电光Q开关。 Q开关包括二次电光材料，并与电子单元连接，该电子单元产生具有正和负脉冲的射频。 该Q开关由射频控制，使得当射频改变其极性时产生激光脉冲

公开(公告)号：US06522456B2

公开(公告)日：2003-02-18

申请号：US09848766

申请日：2001-05-04

申请人： Qiushui Chen ,  Hua Jiang ,  Yingyin Zou ,  Dean Tsang ,  Paul Melman ,  Feiling Wang ,  Guanghai Jin ,  Jing Zhao

发明人： Qiushui Chen ,  Hua Jiang ,  Yingyin Zou ,  Dean Tsang ,  Paul Melman ,  Feiling Wang ,  Guanghai Jin ,  Jing Zhao

IPC分类号： G02F100

CPC分类号： G02F1/21 ,  G02F2001/212 ,  G02F2202/40 ,  G02F2203/055 ,  G02F2203/48

摘要： An apparatus and method for filtering an optical input is disclosed. In an illustrative embodiment, an optical input is split into polarization components along separate paths. The polarization components are then fed into a first electro-optic device that includes a set of electrodes across which a voltage is applied to adjust a wavelength transmission characteristic of the device. A section of the first device positioned between the electrodes preferably has a birefringence that is adjusted depending on the voltage applied across the electrodes. The adjusted components of the optical input are thereafter combined to produce an optical output. Accordingly, the optical input can be attenuated based on the voltage applied to electrodes of the first electro-optic device.

公开(公告)号：US20070296958A1

公开(公告)日：2007-12-27

申请号：US11701738

申请日：2007-02-02

申请人： Yingyin Zou ,  Qiushui Chen ,  Hongzhi Zhao

发明人： Yingyin Zou ,  Qiushui Chen ,  Hongzhi Zhao

IPC分类号： G01N21/00

CPC分类号： G01N21/21

摘要： A polarization imaging apparatus measures the Stokes image of a sample. The apparatus consists of an optical lens set 11, a linear polarizer 14 with its optical axis 18, a first variable phase retarder 12 with its optical axis 16 aligned 22.5° to axis 18, a second variable phase retarder 13 with its optical axis 17 aligned 45° to axis 18, a imaging sensor 15 for sensing the intensity images of the sample, a controller 101 and a computer 102. Two variable phase retarders 12 and 13 were controlled independently by a computer 102 through a controller unit 101 which generates a sequential of voltages to control the phase retardations of VPRs 12 and 13. A set of four intensity images, I0, I1, I2 and I3 of the sample were captured by imaging sensor 15 when the phase retardations of VPRs 12 and 13 were set at (0,0), (π,0), (π,π) and (π/2,π), respectively Then four Stokes components of a Stokes image, S0, S1, S2 and S3 were calculated using the four intensity images.

摘要翻译： 偏振成像装置测量样品的斯托克斯图像。 该装置由光学透镜组11，具有其光轴18的线性偏振器14，其光轴16与轴线18对准22.5°的第一可变相位延迟器12，其光轴17对准的第二可变相位延迟器13 与轴线18成45°的角度，用于感测样本的强度图像的成像传感器15，控制器101和计算机102。 两个可变相位延迟器12和13由计算机102通过控制器单元101独立地控制，控制器单元101产生电压的顺序以控制VPR 12和13的相位延迟。 样本的四个强度图像的集合是I，I，I，I，I 2和I 3， 当VPR 12和13的相位延迟分别设置为（0,0），（pi，0），（pi，pi）和（pi / 2，pi）时，由成像传感器15捕获。 使用四个强度图像计算斯托克斯图像，S 0，S 1，S 2和S 3 3。

公开(公告)号：US20050094678A1

公开(公告)日：2005-05-05

申请号：US10700934

申请日：2003-11-04

申请人： Yingyin Zou ,  Qiushui Chen ,  Run Zhang ,  Hua Jiang

发明人： Yingyin Zou ,  Qiushui Chen ,  Run Zhang ,  Hua Jiang

IPC分类号： H01S3/0941 ,  H01S3/109 ,  H01S3/115 ,  H01S3/16

CPC分类号： H01S3/109 ,  H01S3/09415 ,  H01S3/115 ,  H01S3/1611 ,  H01S3/1673

摘要： An electro-optic Q-switch for generating sequence of laser pulses was disclosed. The Q-switch comprises a quadratic electro-optic material and is connected with an electronic unit generating a radio frequency wave with positive and negative pulses alternatively. The Q-switch is controlled by the radio frequency wave in such a way that laser pulse is generated when the radio frequency wave changes its polarity

摘要翻译： 公开了一种用于产生激光脉冲序列的电光Q开关。 Q开关包括二次电光材料，并与电子单元连接，该电子单元产生具有正和负脉冲的射频。 该Q开关由射频控制，使得当射频改变其极性时产生激光脉冲

公开(公告)号：US06700694B2

公开(公告)日：2004-03-02

申请号：US10164866

申请日：2002-08-14

申请人： Yingyin Zou ,  Feiling Wang ,  Jingwen Zhang

发明人： Yingyin Zou ,  Feiling Wang ,  Jingwen Zhang

IPC分类号： G02F109

CPC分类号： G02F1/0555 ,  G02F1/0136 ,  G02F1/21 ,  G02F2001/212 ,  G02F2202/40 ,  G02F2203/055 ,  G02F2203/48

摘要： An electrically controllable azimuth optical rotator (10) includes a first quarterwave plate (16) for receiving a first beam of electromagnetic energy (22) having a first arbitrary polarization state, and outputting a second beam (122) in response to the first quarterwave plate (16). An electric voltage controlled ferro-electric variable phase retarder (20) aligned at approximately 45 degrees to the first quarterwave plate (16) receives the second beam 122 and provides a third beam 38 in response to the retarder (20). The electric voltage controlled ferro-electric variable phase retarder (20) is characterized by a phase shift of &phgr;=2&agr;, where &agr; is a desired angle of rotation of the first arbitrary polarization state. To provide a voltage-controlled rotation, a second quarterwave plate (18) is aligned either parallel or perpendicular to the first quarterwave plate (16) for receiving the third beam (38) and outputting a fourth beam (46) in response to the retarder (20). As a result, the fourth beam (46) has a polarization state similar to the first arbitrary polarization state but rotated by &agr;.

摘要翻译： 电可控方位光旋转器（10）包括用于接收具有第一任意偏振状态的第一电磁能束（22）的第一四分之一波片（16），并响应于第一四分之一波片输出第二光束（122） （16）。 与第一四分之一波片（16）大致45度对准的电压控制铁电可变相位延迟器（20）接收第二光束122并响应于延迟器（20）提供第三光束38。 电压控制铁电可变相位延迟器（20）的特征在于phi = 2alpha的相移，其中α是第一任意偏振态的期望的旋转角。 为了提供电压控制的旋转，第二四分之一波片（18）被平行或垂直于第一四分之一波片（16）对准，用于接收第三波束（38）并响应于延迟器输出第四波束（46） （20）。 结果，第四光束（46）具有与第一任意偏振态类似的旋转α的极化状态。

公开(公告)号：US06175667B1

公开(公告)日：2001-01-16

申请号：US09157999

申请日：1998-09-22

申请人： Feiling Wang ,  Yingyin Zou ,  Paul Melman ,  Hua Jiang

发明人： Feiling Wang ,  Yingyin Zou ,  Paul Melman ,  Hua Jiang

IPC分类号： G02F1035

CPC分类号： G02F1/21 ,  G02B6/266 ,  G02F1/0311 ,  G02F1/0551 ,  G02F2203/02 ,  G02F2203/06 ,  G02F2203/48

摘要： There is provided a device for use with fiber-optic cables for polarization insensitive amplitude modulation of light comprising a planar electro-optic layer with a reflective conductive mirror electrode on one side and a pair of transparent conductive electrodes on the other. The transparent conductive electrodes have a small separation along a straight line. A GRIN lens has one end in optical contact with the transparent conductive electrodes with its axis located over the line separating the electrodes. An input optical fiber and an output optical fiber are placed in optical contact with the other end of the lens at points which are symmetrically displaced from the axis of the lens. Light coming from input fiber is collimated by the GRIN lens and directed to the transparent electrodes, through the electro-optic layer and to the mirror from which it is reflected and refocused by the GRIN lens onto the output fiber. Applying a voltage between any of the transparent electrodes and the reflecting electrode changes the optical path length for half the beam so that when it is refocused on the output fiber, the two halves interfere constructively of destructively, depending on the change in path length. In one version, the electro-optic layer is a PLZT ceramic plate, while in others, it is a thick or thin film. In still other versions, two or more electro-optic layers are used in series in order to reduce the voltage required for the same optical path length change. A means to eliminate residual sensitivity to polarization sensitivity is described.

摘要翻译： 提供了一种用于光的偏振不敏感幅度调制的光纤电缆的装置，包括在一侧具有反射导电镜电极的平面电光层和另一侧的一对透明导电电极。 透明导电电极沿着直线具有小的间隔。 GRIN透镜的一端与透明导电电极光学接触，其轴线位于分离电极的线上。 输入光纤和输出光纤被放置成与透镜的另一端在与透镜的轴对称位移的点处光学接触。 来自输入光纤的光由GRIN透镜准直，并通过电光层和反射镜引导到透明电极，并将其从GRIN透镜反射并重新聚焦到输出光纤上。 在任何透明电极和反射电极之间施加电压，改变光束的一半的光路长度，使得当它被重新聚焦在输出光纤上时，根据路径长度的变化，这两半的破坏性构造地相互干扰。 在一个版本中，电光层是PLZT陶瓷板，而在其它版本中，它是厚或薄的膜。 在其他版本中，串联使用两个或多个电光层，以便减少相同光程长度变化所需的电压。 描述了消除极化灵敏度的残余灵敏度的手段。