Large Mode Area Optical Fiber
    1.
    发明申请
    Large Mode Area Optical Fiber 有权
    大模光区域光纤

    公开(公告)号:US20100195194A1

    公开(公告)日:2010-08-05

    申请号:US12669664

    申请日:2008-07-16

    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。

    Polarization maintaining and single polarization optical fiber
    3.
    发明授权
    Polarization maintaining and single polarization optical fiber 失效
    极化维护和单极化光纤

    公开(公告)号:US07697809B2

    公开(公告)日:2010-04-13

    申请号:US12220268

    申请日:2008-07-23

    IPC分类号: G02B6/032

    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 所述应力部件包括与F共掺杂的二氧化硅和选自GeO2,P2O5,Y2O3,TiO2和Al2O3中的至少一种掺杂剂,其中应力部件与芯心之间的距离b满足以下等式:1&nlE ; b / a <2。

    Detection System and Optical Fiber for Use in Such System
    4.
    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

    IPC分类号: G01N21/47

    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
    6.
    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

    IPC分类号: G02B6/024

    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。