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    Dual dopant dual alpha multimode optical fiber
    31.
    发明授权
    Dual dopant dual alpha multimode optical fiber 有权
    双掺杂双alpha多模光纤

    公开(公告)号：US07315677B1

    公开(公告)日：2008-01-01

    申请号：US11521022

    申请日：2006-09-14

    申请人： Ming-Jun Li ,  Daniel Aloysius Nolan ,  Pushkar Tandon

    发明人： Ming-Jun Li ,  Daniel Aloysius Nolan ,  Pushkar Tandon

    IPC分类号： G02B6/02

    CPC分类号： G02B6/0288

    摘要： Multimode optical fiber is disclosed herein comprising germania and fluorine co-doped in the core of the fiber. The dopant concentration profiles are defined by a pair of alpha parameters. The operating window, or bandwidth window, is enlarged and attenuation, or loss, is low. In some embodiments, two operating windows are available for transmission.

    摘要翻译： 本文公开了多模光纤，其包括在纤维芯中共掺杂的锗和氟。 掺杂剂浓度分布由一对α参数定义。 操作窗口或带宽窗口被放大，衰减或损耗较低。 在一些实施例中，两个操作窗口可用于传输。

    System and Method for Simultaneously Determining Strain and Temperature Characteristics of an Object
    33.
    发明申请
    System and Method for Simultaneously Determining Strain and Temperature Characteristics of an Object 有权
    同时确定物体的应变和温度特性的系统和方法

    公开(公告)号：US20120123702A1

    公开(公告)日：2012-05-17

    申请号：US12947066

    申请日：2010-11-16

    申请人： Xin Chen ,  Ming-Jun Li ,  Anping Li ,  Daniel Aloysius Nolan

    发明人： Xin Chen ,  Ming-Jun Li ,  Anping Li ,  Daniel Aloysius Nolan

    IPC分类号： G06F19/00 ,  G01K13/00 ,  G01L1/00

    CPC分类号： G01L1/243 ,  G01K11/32 ,  G01K2011/322 ,  G01L1/242

    摘要： A system for simultaneously determining strain and temperature characteristics of an object comprising: (i) at least one optical fiber having at least two Brillouin peaks; (ii) at least one connector securing the optical fiber to the object to be monitored; (iii) a laser positioned to provide laser light to said at least one optical fiber; (iv) a device measuring frequencies of said at least two Brillouin peaks, and determining frequency shifts of said at least two Brillouin peaks for said at least one optical fiber along the length of fiber; and (v) a system calculating strain and temperature characteristics along said fiber, based on the coefficients of strain and temperature as well as the measured Brillouin frequency shifts for said optical fiber along the length of said optical fiber.

    摘要翻译： 一种用于同时确定物体的应变和温度特性的系统，包括：（i）至少一个具有至少两个布里渊峰的光纤; （ii）至少一个将光纤固定到待监测对象的连接器; （iii）定位成向所述至少一个光纤提供激光的激光器; （iv）测量所述至少两个布里渊峰的频率的装置，以及确定沿所述光纤长度的所述至少一个光纤的所述至少两个布里渊峰的频移; 以及（v）基于应变和温度的系数以及所述光纤沿着所述光纤的长度测量的布里渊频移的系统来计算沿着所述光纤的应变和温度特性的系统。

    Detection System and Optical Fiber for Use in Such System
    35.
    发明申请
    Detection System and Optical Fiber for Use in Such System 有权
    用于这种系统的检测系统和光纤

    公开(公告)号：US20100085558A1

    公开(公告)日：2010-04-08

    申请号：US12365417

    申请日：2009-02-04

    申请人： Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Aloysius Nolan

    发明人： Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Aloysius Nolan

    IPC分类号： G01N21/47

    CPC分类号： G01L1/242 ,  C03B2203/19 ,  C03B2203/30 ,  C03B2205/06 ,  G01M11/3181 ,  G02B6/02

    摘要： A detection system comprising: (i) an optical fiber, the optical fiber having (a) a length L≧1 km; (b) beat length between 10 m and 100 m; and (c) beat length uniformity over any distance of at least 100 m within the length L is characterized by standard deviation σ, where |σ|≦10 m; (ii) an OTDR coupled to the fiber and including (a) a radiation source providing pulsed radiation to the fiber, (b) a detection system capable of detecting radiation that is backscattered back through the fiber; and (iii) at least one polarizer situated between the fiber and the detector, such that the backscattered radiation passes through the polarizer before reaching the detector.

    摘要翻译： 一种检测系统，包括：（i）光纤，所述光纤具有（a）长度L≥1km; （b）拍摄距离在10米至100米之间; 和（c）在长度L内的至少100米的任何距离上的击穿长度均匀性的特征在于标准偏差＆sgr，其中|＆sgr | |＆nlE; 10m; （ii）耦合到所述光纤的OTDR，并且包括（a）向所述光纤提供脉冲辐射的辐射源，（b）能够检测通过所述光纤反向散射的辐射的检测系统; 和（iii）位于光纤和检测器之间的至少一个偏振器，使得后向散射的辐射在到达检测器之前穿过偏振器。

    Solid type polarization maintaining fiber and apparatus
    37.
    发明授权
    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：US07177512B2

    公开(公告)日：2007-02-13

    申请号：US11239788

    申请日：2005-09-29

    申请人： George Edward Berkey ,  Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Aloysius Nolan

    发明人： George Edward Berkey ,  Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Aloysius Nolan

    IPC分类号： G02B6/024

    CPC分类号： G02B6/03627 ,  G02B6/024 ,  G02B6/0281 ,  G02B6/03694

    摘要： 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.

    摘要翻译： 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。

    Detection system and optical fiber for use in such system
    39.
    发明授权
    Detection system and optical fiber for use in such system 有权
    用于这种系统的检测系统和光纤

    公开(公告)号：US07999930B2

    公开(公告)日：2011-08-16

    申请号：US12365417

    申请日：2009-02-04

    申请人： Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Aloysius Nolan

    发明人： Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Aloysius Nolan

    IPC分类号： G01N21/00

    CPC分类号： G01L1/242 ,  C03B2203/19 ,  C03B2203/30 ,  C03B2205/06 ,  G01M11/3181 ,  G02B6/02

    摘要： A detection system comprising: (i) an optical fiber, the optical fiber having (a) a length L≧1 km; (b) beat length between 10 m and 100 m; and (c) beat length uniformity over any distance of at least 100 m within the length L is characterized by standard deviation σ, where |σ|≦10 m; (ii) an OTDR coupled to the fiber and including (a) a radiation source providing pulsed radiation to the fiber, (b) a detection system capable of detecting radiation that is backscattered back through the fiber; and (iii) at least one polarizer situated between the fiber and the detector, such that the backscattered radiation passes through the polarizer before reaching the detector.

    摘要翻译： 一种检测系统，包括：（i）光纤，所述光纤具有（a）长度L≥1km; （b）拍摄距离在10米至100米之间; 和（c）在长度L内的至少100米的任何距离上的击穿长度均匀性的特征在于标准偏差＆sgr，其中|＆sgr | |＆nlE; 10m; （ii）耦合到所述光纤的OTDR，并且包括（a）向所述光纤提供脉冲辐射的辐射源，（b）能够检测通过所述光纤反向散射的辐射的检测系统; 和（iii）位于光纤和检测器之间的至少一个偏振器，使得后向散射的辐射在到达检测器之前穿过偏振器。