公开(公告)号：US07701561B2

公开(公告)日：2010-04-20

申请号：US11701738

申请日：2007-02-02

Applicant: Yingyin Kevin Zou ,  Qiushui Chen ,  Hongzhi Zhao

Inventor： Yingyin Kevin Zou ,  Qiushui Chen ,  Hongzhi Zhao

IPC: G01N21/00

CPC classification number: G01N21/21

Abstract: 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.

Abstract translation: 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，用于感测样品的强度图像，控制器101和计算机102的成像传感器15.两个可变相位延迟器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产生顺序 的电压以控制VPR 12和13的相位延迟。当VPR 12和13的相位延迟设置为（0）时，由成像传感器15捕获一组样本的四个强度图像I0，I1，I2和I3 ，（＆pgr;，0），（＆pgr;，＆pgr）和（＆pgr; / 2，＆pgr））分别使用以下方法计算斯托克斯图像S0，S1，S2和S3的四个斯托克斯分量 四个强度图像。

公开(公告)号：US20050094678A1

公开(公告)日：2005-05-05

申请号：US10700934

申请日：2003-11-04

Applicant: Yingyin Zou ,  Qiushui Chen ,  Run Zhang ,  Hua Jiang

Inventor： Yingyin Zou ,  Qiushui Chen ,  Run Zhang ,  Hua Jiang

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

CPC classification number: H01S3/109 ,  H01S3/09415 ,  H01S3/115 ,  H01S3/1611 ,  H01S3/1673

Abstract: 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

Abstract translation: 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：US06330097B1

公开(公告)日：2001-12-11

申请号：US09288439

申请日：1999-04-08

Applicant: Qiushui Chen ,  Gary Y. Wang ,  Paul Melman ,  Kevin Zou ,  Hua Jiang ,  Run Zhang ,  Jing Zhao ,  Dean Tsang ,  Feiling Wang

Inventor： Qiushui Chen ,  Gary Y. Wang ,  Paul Melman ,  Kevin Zou ,  Hua Jiang ,  Run Zhang ,  Jing Zhao ,  Dean Tsang ,  Feiling Wang

IPC: G02B2600

CPC classification number: G02F1/055 ,  G02F1/0555 ,  G02F1/0556 ,  G02F2201/17 ,  G02F2203/06 ,  G02F2203/48

Abstract: An optical modulator is provided to control the intensity of a transmitted or reflected light. In a transmission mode, a separator splits arbitrarily polarized light into two polarization rays and one is made to travel a separate path from the other. A recombiner causes the two rays to recombine at an output unless an electro-optic phase retarder changes the polarization of the two rays, in which case, both of them miss the output by an amount which is a function of the voltage on the retarder. A normally-off version with low polarization mode dispersion is obtained by changing the orientation of the recombiner. A normally-on version with low polarization mode dispersion is obtained with a passive polarization direction rotator. Similar results can be obtained in a reflection mode where the input and output are on the same side of the modulator. Versions using a GRIN lens are particularly suited to modulation of light out of and back into fiber-optic cables. The device can be operated as a variable optical attenuator, an optical switch, or a high speed modulator and is insensitive to polarization of the input light. A preferred material for the phase retarder is a hot-pressed ceramic lead lanthanum zirconate titanate composition.

Abstract translation: 提供光调制器以控制透射或反射光的强度。 在透射模式中，分离器将任意偏振光分离成两个偏振光，一个偏振光从另一个行进。 重组器会导致两条射线在输出端重新组合，除非电光相位延迟器改变两个射线的极化，在这种情况下，它们都将输出误差减去延迟器上的电压的函数。 通过改变重组器的取向，获得具有低偏振模色散的常关型。 使用无源偏振方向旋转器获得具有低偏振模色散的常导版本。 在输入和输出位于调制器的同一侧的反射模式下可以获得类似的结果。 使用GRIN镜头的版本特别适用于调制光纤到光纤的光纤。 该器件可以作为可变光衰减器，光开关或高速调制器操作，并且对输入光的偏振不敏感。 用于相缓凝剂的优选材料是热压陶瓷铅锆酸镧锆酸盐组合物。

公开(公告)号：US6137619A

公开(公告)日：2000-10-24

申请号：US158224

申请日：1998-09-22

Applicant: Qiushui Chen ,  Gary Y. Wang ,  Paul Melman ,  Kevin Zou ,  Hua Jiang ,  Run Zhang ,  Jing Zhao

Inventor： Qiushui Chen ,  Gary Y. Wang ,  Paul Melman ,  Kevin Zou ,  Hua Jiang ,  Run Zhang ,  Jing Zhao

IPC: G02F1/055 ,  G02F1/03

CPC classification number: G02F1/055 ,  G02F1/0555 ,  G02F1/0556 ,  G02F2201/17 ,  G02F2203/06 ,  G02F2203/48

Abstract: An optical modulator is provided to control the intensity of a transmitted or reflected light. In a transmission mode, a separator splits arbitrarily polarized light into two polarization rays and one is made to travel a separate path from the other. A recombiner causes the two rays to recombine at an output unless an electro-optic phase retarder changes the polarization of the two rays, in which case, both of them miss the output by an amount which is a function of the voltage on the retarder. A normally-off version with low polarization mode dispersion is obtained by changing the orientation of the recombiner. A normally-on version with low polarization mode dispersion is obtained with a passive polarization direction rotator. Similar results can be obtained in a reflection mode where the input and output are on the same side of the modulator. Versions using a GRIN lens are particularly suited to modulation of light out of and back into fiber-optic cables. The device can be operated as a variable optical attenuator, an optical switch, or a high speed modulator and is insensitive to polarization of the input light. A preferred material for the phase retarder is a hot-pressed ceramic lead lanthanum zirconate titanate composition.