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340 条记录 (耗时 0.047 秒)

    Method for producing optical fiber having controlled perturbations
    35.
    发明授权
    Method for producing optical fiber having controlled perturbations 有权
    具有受控扰动的光纤的制造方法

    公开(公告)号：US09290406B2

    公开(公告)日：2016-03-22

    申请号：US13587091

    申请日：2012-08-16

    申请人： Xin Chen ,  Charles Frederick Laing ,  Ming-Jun Li ,  Anping Liu ,  Eric John Mozdy ,  Joseph Doull Thaler

    发明人： Xin Chen ,  Charles Frederick Laing ,  Ming-Jun Li ,  Anping Liu ,  Eric John Mozdy ,  Joseph Doull Thaler

    IPC分类号： C03B37/025 ,  C03B37/027

    CPC分类号： C03B37/02745 ,  C03B37/02763 ,  C03B2203/06 ,  C03B2203/18 ,  C03B2203/20 ,  Y02P40/57

    摘要： A method for producing an optical fiber is provided. The method includes the steps of drawing an optical fiber from a heated glass source in a furnace and introducing index perturbations to the optical fiber via a plurality of perturbation sources arranged at a plurality of different azimuthal locations. The index perturbations are introduced synchronously at different locations along the axial length of the fiber by the plurality of perturbation sources in a generally helical pattern on the outside surface of the fiber in one embodiment. According to another embodiment, the index perturbations are introduced by the plurality of perturbation sources at different frequencies.

    摘要翻译： 提供一种光纤的制造方法。 该方法包括以下步骤：在炉中从加热的玻璃源中拉出光纤，并且通过布置在多个不同方位位置处的多个扰动源将折射率扰动引入光纤。 在一个实施例中，通过多个扰动源以纤维的外表面上的大致螺旋图案沿着纤维的轴向长度在不同位置同时引入折射率扰动。 根据另一实施例，索引扰动由多个扰动源以不同的频率引入。

    Large mode area optical fiber
    37.
    发明授权
    Large mode area optical fiber 有权
    大模光区域光纤

    公开(公告)号：US08797642B2

    公开(公告)日：2014-08-05

    申请号：US12669664

    申请日：2008-07-16

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

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

    IPC分类号： G02B6/036 ,  H04B10/17

    CPC分类号： G02B6/14 ,  G02B6/024 ,  G02B6/03644 ,  G02B6/03661 ,  G02B6/03688 ,  H01S3/06708 ,  H01S3/06712 ,  H01S3/06729 ,  H01S3/08045 ,  H01S3/094007

    摘要： A large-mode-area (LMA) optical fiber (10) that operates as a single-mode optical fiber. The optical fiber includes a core region (20) surrounded by an inner cladding (32), which in turn is surrounded by an outer cladding (40). The inner cladding includes at least one up-doped ring region (32R1). The ring region is configured to form a large attenuation differential between the higher-order modes and the fundamental mode so only that the fundamental mode remains traveling in the optical fiber. If necessary, the optical fiber can include a bend (10B) having a select “resonant” bend diameter (DB) that increases the relative attenuation of the fundamental and higher-order modes. The optical fiber supports an effective mode field diameter (MFD) of up to 40 μm to 50 μm. As a result, detrimental non-linear effects are suppressed, which allows the optical fiber to carry substantially more optical power than conventional LMA optical fibers. The LMA optical fiber is thus eminently suited for a number of optical-fiber-based applications calling for high optical power, such as fiber lasers and pump sources for wavelength conversion.

    摘要翻译： 作为单模光纤工作的大模（LMA）光纤（10）。 光纤包括由内包层（32）包围的芯区域（20），该内部区域又由外包层（40）围绕。 内包层包括至少一个上掺杂环区（32R1）。 环形区域被配置为在高阶模式和基模之间形成大的衰减差分，从而仅使基本模式保持在光纤中行进。 如果需要，光纤可以包括具有选择的“共振”弯曲直径（DB）的弯曲（10B），该弯曲直径（DB）增加了基极和高阶模的相对衰减。 光纤支持高达40μm至50μm的有效模场直径（MFD）。 结果，抑制了有害的非线性效应，这使得光纤比传统的LMA光纤承载更多的光功率。 因此，LMA光纤非常适合于需要高光功率的多个基于光纤的应用，例如用于波长转换的光纤激光器和泵浦光源。

    Detection system and optical fiber for use in such system
    40.
    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。