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    Detection system and optical fiber for use in such system
    51.
    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。

    Optical fiber with large effective area
    53.
    发明授权
    Optical fiber with large effective area 失效
    光纤有效面积大

    公开(公告)号：US07603015B2

    公开(公告)日：2009-10-13

    申请号：US12070845

    申请日：2008-02-21

    申请人： Scott Robertson Bickham ,  Dana Craig Bookbinder ,  Xin Chen ,  Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Daniel Aloysius Nolan ,  Pushkar Tandon

    发明人： Scott Robertson Bickham ,  Dana Craig Bookbinder ,  Xin Chen ,  Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Daniel Aloysius Nolan ,  Pushkar Tandon

    IPC分类号： G02B6/02 ,  G02B6/36

    CPC分类号： G02B6/02014 ,  G02B6/02019 ,  G02B6/02357 ,  G02B6/02366 ,  G02B6/0365 ,  G02B6/03661 ,  G02B6/03688

    摘要： An optical fiber comprising: a glass core extending from a centerline to a radius R1; a glass cladding surrounding and in contact with the core, the cladding comprising: a first annular region extending from R1 to a radius R2, the first annular region comprising a radial width, W2=R2−R1, a second annular region extending from R2 to a radius R3, the second annular region comprising a radial width, W3=R3−R2, and a third annular region extending from R3 to an outermost glass radius R4; wherein (i) the core comprises a maximum relative refractive index, Δ1MAX, relative to the third annular region; (ii) wherein the first annular region comprises a radial width W2; and (iii) the second annular region comprises a minimum relative refractive index, Δ3MIN, relative to the third annular region wherein Δ1MAX>Δ2MAX>Δ3MIN, and Δ2MIN>Δ3MIN; and the core and the cladding provide a fiber with cable cutoff less than 1500 nm, dispersion at 1550 nm less than 12 ps/nm/km, effective area at 1550 nm greater than 60 μm2, and preferably greater than 70 μm2. The second annular cladding region may contain a plurality of randomly dispersed holes.

    摘要翻译： 一种光纤，包括：从中心线延伸到半径R1的玻璃芯; 围绕并与芯接触的玻璃包层，所述包层包括：从R1延伸到半径R2的第一环形区域，所述第一环形区域包括径向宽度W2 = R2-R1，从R2延伸到第二环形区域 半径R3，第二环形区域包括径向宽度，W3 = R3-R2，以及从R3延伸到最外侧玻璃半径R4的第三环状区域; 其中（i）所述芯包括相对于所述第三环形区域的最大相对折射率Delta1MAX; （ii）其中所述第一环形区域包括径向宽度W2; 和（iii）第二环形区域包括相对于第三环形区域的最小相对折射率Delta3MIN，其中Delta1MAX> Delta2MAX> Delta3MIN和Delta2MIN> Delta3MIN; 并且芯和包层提供具有小于1500nm的电缆截止的光纤，在1550nm处的色散小于12ps / nm / km，在1550nm处的有效面积大于60mum2，优选大于70mum2。 第二环形包层区域可以包含多个随机分布的孔。

    Double-clad optical fibers and devices with double-clad optical fibers
    54.
    发明授权
    Double-clad optical fibers and devices with double-clad optical fibers 有权
    双包层光纤和双包层光纤器件

    公开(公告)号：US07590324B1

    公开(公告)日：2009-09-15

    申请号：US12179086

    申请日：2008-07-24

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

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

    IPC分类号： G02B6/02

    CPC分类号： G02B6/02261 ,  G02B6/02342 ,  G02B6/02357 ,  G02B6/03633

    摘要： A double-clad optical fiber includes a core, an inner cladding and an outer cladding of silica-based glass. The core may have a radius of less than about 5 μm, a first index of refraction n1 and does not contain any active rare-earth dopants. The inner cladding may surround the core and includes a radial thickness of at least about 25 μm, a numerical aperture of at least about 0.25, and a second index of refraction n2 such that n2

    摘要翻译： 双包层光纤包括芯，内包层和二氧化硅基玻璃的外包层。 芯可以具有小于约5μm的半径，第一折射率n1并且不包含任何活性稀土掺杂剂。 内包层可以围绕芯部并且包括至少约25μm的径向厚度，至少约0.25的数值孔径和第二折射率n2，使得n2

    Low bend loss coated optical fiber
    55.
    发明授权
    Low bend loss coated optical fiber 有权
    低折射损耗涂层光纤

    公开(公告)号：US07539381B2

    公开(公告)日：2009-05-26

    申请号：US11801896

    申请日：2007-05-11

    申请人： Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Anping Liu ,  Jianguo Wang

    发明人： Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Anping Liu ,  Jianguo Wang

    IPC分类号： G02B6/02

    CPC分类号： C03C25/106 ,  G02B6/02395 ,  G02B6/03683

    摘要： An optical fiber includes a core and a cladding, said cladding having a refractive index nc a first coating directly contacting the cladding of said fiber, said coating having a thickness of less than 10 microns, said coating having a refractive index delta %=100×(ni2−nc2)/2ni2 less than −1 percent. In another aspect, an optical fiber includes a core and a cladding, said cladding having a refractive index nc, a first coating directly contacting the cladding of said fiber, said fiber comprising a glass diameter less than 100 microns, said coating having a thickness of at least 8 microns, said coating having a refractive index delta %=100×(ni2−nc2)/2ni2 less than −1 percent.

    摘要翻译： 光纤包括芯和包层，所述包层具有折射率nc，第一涂层直接接触所述纤维的包层，所述涂层的厚度小于10微米，所述涂层具有折射率δ％= 100×（ ni2-nc2）/ 2ni2小于-1％。 在另一方面，光纤包括芯和包层，所述包层具有折射率nc，直接接触所述纤维包层的第一涂层，所述纤维包含小于100微米的玻璃直径，所述涂层的厚度为 至少8微米，所述涂层具有小于-1％的折射率Δ％= 100×（ni2-nc2）/ 2ni2。

    Polarization Maintaining And Single Polarization Optical Fiber
    56.
    发明申请
    Polarization Maintaining And Single Polarization Optical Fiber 失效
    极化维护和单极化光纤

    公开(公告)号：US20090080843A1

    公开(公告)日：2009-03-26

    申请号：US12220268

    申请日：2008-07-23

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

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

    IPC分类号： G02B6/02

    CPC分类号： G02B6/024

    摘要： An optical fiber, comprising: (i) a core having a core center and a radius or a width a, (ii) a cladding surrounding the core, and (iii) at least one stress member situated proximate to the fiber core within the cladding, said stress member comprising silica co-doped with F and at least one dopant selected from the list consisting of: GeO2, P2O5, Y2O3, TiO2 and Al2O3, wherein distance b between the stress member and the core center satisfies the following equation: 1≦b/a

    摘要翻译： 1.一种光纤，包括：（i）具有芯中心和半径或宽度a的芯，（ii）围绕所述芯的包层，以及（iii）至少一个应力构件，位于所述包层内的所述纤维芯附近 所述应力构件包括与F共掺的二氧化硅和选自GeO2，P2O5，Y2O3，TiO2和Al2O3中的至少一种掺杂剂，其中应力构件和核心中心之间的距离b满足以下等式：1 <= b / a <2。

    Single polarization fiber and method of evaluating fiber cutoff wavelengths using optical time domain reflectometry
    57.
    发明申请
    Single polarization fiber and method of evaluating fiber cutoff wavelengths using optical time domain reflectometry 失效
    单极化光纤和使用光时域反射测量法评估光纤截止波长的方法

    公开(公告)号：US20070165978A1

    公开(公告)日：2007-07-19

    申请号：US11331905

    申请日：2006-01-13

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

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

    IPC分类号： G02B6/00

    CPC分类号： C03B37/07 ,  C03B37/0124 ,  C03B2203/14 ,  G01M11/3181 ,  Y02P40/57

    摘要： A method for measuring fundamental mode cutoff wavelength of single polarization fiber comprising: (i) launching pulsed light of at least one wavelength λi into one end of the single polarization fiber; (ii) measuring backscattered light intensity corresponding to said wavelength to obtain the backscattered light intensity as a function of fiber position, wherein the backscattered light propagates through the same end of the fiber; and (iii) determining at least one cutoff wavelength and the corresponding position within said fiber for the cutoff wavelength, based on a specified threshold light intensity level.

    摘要翻译： 一种用于测量单极化光纤的基模截止波长的方法，包括：（i）将至少一个波长λλ的脉冲光发射到单极化光纤的一端; （ii）测量对应于所述波长的反向散射光强度以获得作为光纤位置的函数的背向散射光强度，其中所述反向散射光通过所述光纤的同一端传播; 以及（iii）基于指定的阈值光强度水平确定所述光纤中的至少一个截止波长和所述光纤中的对应位置作为所述截止波长。

    Method of estimating and measuring longitudinal dispersion in optical fibers
    58.
    发明授权
    Method of estimating and measuring longitudinal dispersion in optical fibers 失效
    估计和测量光纤纵向色散的方法

    公开(公告)号：US07221439B2

    公开(公告)日：2007-05-22

    申请号：US11118302

    申请日：2005-04-29

    申请人： Xin Chen ,  Charles F. Laing ,  Ming-Jun Li ,  Sonya M. Raney

    发明人： Xin Chen ,  Charles F. Laing ,  Ming-Jun Li ,  Sonya M. Raney

    IPC分类号： G01N21/00

    CPC分类号： G01M11/332 ,  G01M11/3163 ,  G01M11/338

    摘要： A method for measuring longitudinal variation in chromatic dispersion in an optical fiber, comprising: (i) launching into a first end and a second end of optical fiber an optical signal at a wavelength λ1 to collect backscatter power P(z) for different positions z within said optical fiber and providing measured OTDR backscatter traces; (ii) deriving from the measured OTDR backscatter traces at the single OTDR wavelength λ1 either (a) the longitudinal MFD(z) data or (b) the relative MFD data; and (iii) calculating estimated longitudinal dispersion D(z) from the longitudinal MFD(z) data or the relative MFD data, without utilizing any other wavelength data.

    摘要翻译： 一种用于测量光纤中色散的纵向变化的方法，包括：（i）向光纤的第一端和第二端发射波长为λ1的光信号以收集反向散射功率 P（z）用于所述光纤内的不同位置z，并提供测量的OTDR后向散射迹线; （ii）（a）纵向MFD（z）数据或（b）相对MFD数据在单个OTDR波长λ1下从所测量的OTDR反向散射迹线得出; 和（iii）从纵向MFD（z）数据或相对MFD数据计算估计的纵向色散D（z），而不使用任何其它波长数据。