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    SOLID TYPE SINGLE POLARIZATION FIBER AND APPARATUS
    2.
    发明申请
    SOLID TYPE SINGLE POLARIZATION FIBER AND APPARATUS 失效
    固体类型单极化光纤和装置

    公开(公告)号：US20050244118A1

    公开(公告)日：2005-11-03

    申请号：US10837861

    申请日：2004-05-03

    Applicant: George Berkey ,  Xin Chen

    Inventor： George Berkey ,  Xin Chen

    IPC: G02B6/024 ,  G02B6/036 ,  G02B6/17

    CPC classification number: G02B6/03627 ,  G02B6/024 ,  G02B6/0281 ,  G02B6/03694

    Abstract: Disclosed is an optical fiber (20) having a centermost laterally-elongated core (30) having a short dimension (a), a long dimension (b) and a first refractive index (n1), a moat (40) surrounding the central laterally-elongated core, the moat (40) having a second refractive index (n2), an outer dimension (c) and an outer dimension (d), and a cladding (50) surrounding the moat (40), the cladding (50) having a third refractive index (n3), wherein n1>n3>n2, a ratio of b/a is between 1.5 and 5.0, and a ratio of d/a is between 2.0 and 7.0. The fiber supports a single (one and only one) polarization within a Single Polarization Band (SPB). The fiber (20) may be coupled to optical components in apparatus where single polarization properties are desired.

    Abstract translation: 公开了一种光纤（20），其具有具有短尺寸（a），长尺寸（b）和第一折射率（n <1> 1）的中心横向细长芯部（30）， 围绕中央横向细长的芯的护城河（40），护城河（40）具有第二折射率（n 2/2），外部尺寸（c）和外部尺寸（d），以及 围绕护城河（40）的包层（50），包层（50）具有第三折射率（n 3/3），其中n 1 n 3 < / SUB >> n 2，b / a的比例在1.5和5.0之间，d / a的比率在2.0和7.0之间。 光纤支持在单极化带（SPB）内的单一（仅一个）极化。 纤维（20）可以耦合到需要单极化性质的设备中的光学部件。

    Solid type polarization maintaining fiber and apparatus
    4.
    发明申请
    Solid type polarization maintaining fiber and apparatus 失效
    固体型保偏纤维及其设备

    公开(公告)号：US20060018612A1

    公开(公告)日：2006-01-26

    申请号：US11239788

    申请日：2005-09-29

    Applicant: George Berkey ,  Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Nolan

    Inventor： George Berkey ,  Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Nolan

    IPC: G02B6/02

    CPC classification number: G02B6/03627 ,  G02B6/024 ,  G02B6/0281 ,  G02B6/03694

    Abstract: Disclosed is an optical fiber (20) having a centermost laterally-elongated core (30) having a short dimension (a), a long dimension (b) and a first refractive index (n1), a moat (40) surrounding the central laterally-elongated core, the moat (40) having a second refractive index (n2), an outer dimension (c) and an outer dimension (d), and a cladding (50) surrounding the moat (40), the cladding (50) having a third refractive index (n3), wherein n1>n3>n2, a ratio of b/a is between 1.5 and 5.0, and a ratio of d/a is between 2.0 and 7.0. The fiber exhibits polarization maintaining properties in a PMB situated below (i.e., at shorter wavelength than SPB), such that beat length normalized to 1550 nm wavelength is preferably less than 10 mm. The fiber (20) may be coupled to optical components in apparatus where single polarization or polarization maintaining properties are desired.

    Abstract translation: 公开了一种光纤（20），其具有具有短尺寸（a），长尺寸（b）和第一折射率（n <1> 1）的中心横向细长芯部（30）， 围绕中央横向细长的芯的护城河（40），护城河（40）具有第二折射率（n 2/2），外部尺寸（c）和外部尺寸（d），以及 围绕护城河（40）的包层（50），包层（50）具有第三折射率（n 3/3），其中n 1 n 3 < / SUB >> n 2，b / a的比例在1.5和5.0之间，d / a的比率在2.0和7.0之间。 纤维在位于低于（即在比SPB更短的波长）的PMB中表现出极化保持性能，使得标准化为1550nm波长的拍子长度优选小于10mm。 光纤（20）可以耦合到需要单极化或偏振保持特性的装置中的光学部件。

    Guided Wave Non-Destructive Testing Using Magnetostrictive Sensor with Moving Magnet and Partial Activation of Magnetostrictive Strip
    7.
    发明公开
    Guided Wave Non-Destructive Testing Using Magnetostrictive Sensor with Moving Magnet and Partial Activation of Magnetostrictive Strip 审中-公开

    公开(公告)号：US20240027403A1

    公开(公告)日：2024-01-25

    申请号：US18357142

    申请日：2023-07-23

    Applicant: Sergey Vinogradov ,  Xin Chen ,  Jay Fisher

    Inventor： Sergey Vinogradov ,  Xin Chen ,  Jay Fisher

    IPC: G01N29/24 ,  G01N29/265

    CPC classification number: G01N29/2412 ,  G01N29/265 ,  G01N2291/044 ,  G01N2291/0422

    Abstract: A “partial activation” method of magnetostrictive guided wave testing of a structure. A coil-wrapped magnetostrictive strip is acoustically coupled to the surface of the structure. A permanent magnet is placed over a portion of the strip, such that the permanent magnet covers all or most of the width of the strip but only a portion of its length. A pulsed alternating current source activates the magnetostrictive strip, thereby producing magnetostrictive vibrations in the magnetostrictive strip, and thereby resulting in guided waves in the structure. Response signals are received, then the permanent magnet is moved to a next position along the length of the magnetostrictive strip. As the magnet is moved along the strip, the strip is activated and response signals are received, thereby testing a desired portion of the structure under the strip. The response signals are analyzed to determine the presence of anomalies in the structure.

    Synchronization method and system for single event list type data in PET imaging
    9.
    发明授权
    Synchronization method and system for single event list type data in PET imaging 有权

    公开(公告)号：US10930031B2

    公开(公告)日：2021-02-23

    申请号：US14408935

    申请日：2012-08-14

    Applicant: Qingguo Xie ,  Yuanbao Chen ,  Jun Zhu ,  Xin Chen ,  Zhongyi Wu ,  Luyao Wang

    Inventor： Qingguo Xie ,  Yuanbao Chen ,  Jun Zhu ,  Xin Chen ,  Zhongyi Wu ,  Luyao Wang

    IPC: G06T11/00 ,  G01T1/29 ,  A61B6/03

    Abstract: A method for synchronizing list-mode data of single events in a PET imaging includes: acquiring list-mode data of single events of each independent detector module, calculating a probability density of time intervals between occurrences of single events in detector module and setting initial parameters, determining detection starting time difference of each detector module with iterative peak searching and graded time window, and performing synchronization correction and coincidence discrimination on the single event data in each detector module based on the detection starting time difference. A system for synchronizing list-mode data of single events in a PET imaging includes: a data acquisition and frequency difference compensation module, an initial parameter setting module, a coarse time scale coincidence module, a fine time scale coincidence module and a data synchronization correction and coincidence discrimination module.

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