Single polarization fiber and method of evaluating fiber cutoff wavelengths using optical time domain reflectometry
    1.
    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

    IPC分类号: G02B6/00

    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。

    Solid type polarization maintaining fiber and apparatus
    3.
    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

    IPC分类号: G02B6/02

    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。

    Dispersion correction fiber, transmission system and method of operating same
    10.
    发明申请
    Dispersion correction fiber, transmission system and method of operating same 审中-公开
    色散校正光纤,传输系统及其操作方法

    公开(公告)号:US20050185905A1

    公开(公告)日:2005-08-25

    申请号:US11057313

    申请日:2005-02-11

    摘要: A dispersion correction optical fiber includes a segmented core having a central core segment, a moat segment and, preferably, a ring segment. The refractive index profile is selected to provide a total dispersion minimum which is located within an operating wavelength band of the fiber. Most preferably, the dispersion value at the minimum is more negative than −400 ps/nm/km and greater than −1200 ps/nm/km at 1550 nm. Optical transmission systems including the present invention dispersion correction optical fiber optically coupled to various transmission fibers and dispersion compensating fibers are also disclosed, as is a method of operating the dispersion correction fiber wherein the minimum is located within the desired operating wavelength band.

    摘要翻译: 色散校正光纤包括具有中心核心段,护环段和优选环形段的分段核心。 选择折射率分布以提供位于光纤的工作波长带内的总色散最小值。 最优选地,在1550nm处,最小的色散值比-400ps / nm / km更大,大于-1200ps / nm / km。 还公开了包括光学耦合到各种传输光纤和色散补偿光纤的本发明的色散校正光纤的光传输系统,以及操作色散校正光纤的方法,其中最小值位于期望的工作波长带内。