Distributed optical fibre sensor
    1.
    发明授权
    Distributed optical fibre sensor 有权
    分布式光纤传感器

    公开(公告)号:US09304017B2

    公开(公告)日:2016-04-05

    申请号:US13884017

    申请日:2011-11-09

    Inventor: Vincent Handerek

    Abstract: There is described a distributed optical fiber sensor for detecting one or more physical parameters indicative of an environmental influence on a sensor optical fiber, as a function of position along the sensor fiber. The sensor uses probe light pulses of different wavelengths. At least some of the probe light pulses may also be of different pulse lengths. The relative phase bias between interferometric signals in backscattered probe light of different wavelength pulses may also be controlled.

    Abstract translation: 描述了一种分布式光纤传感器,用于根据传感器光纤的位置来检测指示对传感器光纤的环境影响的一个或多个物理参数。 传感器使用不同波长的探针光脉冲。 至少一些探针光脉冲也可以具有不同的脉冲长度。 也可以控制不同波长脉冲的后向散射探测光中的干涉信号之间的相对相位偏差。

    Retroreflective device comprising gradient index lenses
    2.
    发明申请
    Retroreflective device comprising gradient index lenses 失效
    回射装置包括梯度折射率透镜

    公开(公告)号:US20060109561A1

    公开(公告)日:2006-05-25

    申请号:US10516370

    申请日:2004-08-27

    CPC classification number: C03C12/02 G02B5/128

    Abstract: A retroreflective device comprising a substantially spherical graded refractive index lens, referred to as a GRIN-sphere lens (2), a reflective part for retroreflecting (6) a radiation beam (B) passing through the graded refractive index lens and, at least partially surrounding the lens, a transparent material (4) having a substantially uniform refractive index.

    Abstract translation: 一种回射装置,包括基本上球形的渐变折射率透镜,称为GRIN球面透镜(2),用于回射(6)穿过渐变折射率透镜的辐射束(B)的反射部分,以及至少部分地 围绕透镜,具有基本上均匀的折射率的透明材料(4)。

    Fiber fuse protection
    3.
    发明授权

    公开(公告)号:US06640043B2

    公开(公告)日:2003-10-28

    申请号:US09747679

    申请日:2000-12-22

    Inventor: Vincent Handerek

    CPC classification number: G02B6/243

    Abstract: An optical termination element for terminating an optical fiber carrying a signal of first maximum power level comprises a termination fiber which is unable to propagate a fiber fuse when the signal power is below a threshold power level which is greater than the first maximum power level. The termination fiber is designed by selecting values of the core diameter and the higher mode cutoff wavelength. The intention provides a termination component in which a fiber fuse can not be initiated at the maximum power to be provided to the termination.

    Retroreflective devices and systems
    5.
    发明申请
    Retroreflective devices and systems 审中-公开
    回射装置和系统

    公开(公告)号:US20050231803A1

    公开(公告)日:2005-10-20

    申请号:US10516951

    申请日:2004-10-14

    CPC classification number: G02B5/126 G02F1/13 G02F1/13392 G02F1/141 H04B10/2587

    Abstract: This invention relates to retroreflective devices and systems incorporating such devices; the term “retroreflective devices” as used herein being intended to encompass generally optical components used for returning radiation automatically from a remote location toward an optical source. In one aspect, an embodiment of the invention is a retroreflective device comprising a lens having a non-planar outer surface; and a liquid crystal cell having a non-planar layer comprising liquid crystal material, said non-planar layer having a shape corresponding with that of the non-planar outer surface of the lens. The device includes a reflective part arranged to retroreflect a radiation beam passing through the lens, and the liquid crystal cell is arranged to modulate one or more characteristics of said retroreflected radiation beam. Embodiments of the invention are advantageous for use in applications that require thin, transmissive modulators that are compatible with non-planar retroreflecting devices. Liquid crystals offer a useful modulation action for optical path lengths of 1 mm and less, and, since the local orientation of their molecular symmetry axes can be controlled by the fabrication process so as to vary with position, they can be made to be locally optimum over the whole of the reflecting surface of the non-planar retroreflecting device. In addition, liquid crystal devices are associated with low power requirements, which make them advantageous for use in power-limited applications.

    Abstract translation: 本发明涉及包括这种装置的回射装置和系统; 如本文所使用的术语“逆反射装置”旨在涵盖用于将辐射自动从远程位置朝向光源返回的通常的光学部件。 在一个方面,本发明的实施例是一种回射装置,其包括具有非平面外表面的透镜; 以及具有包含液晶材料的非平面层的液晶单元,所述非平面层具有与透镜的非平面外表面相对应的形状。 该装置包括反射部件,其被布置成回射通过透镜的辐射束,并且液晶单元被布置成调制所述回射的辐射束的一个或多个特性。 本发明的实施例对于需要与非平面回射装置兼容的薄的,透射的调制器的应用中是有利的。 液晶为1mm以下的光路长度提供有用的调制作用,并且由于其分子对称轴的局部取向可以通过制造工艺进行控制,以便随着位置而变化,因此它们可以被局部最佳化 在非平面回射装置的整个反射表面上。 此外,液晶装置与低功率要求相关联,这使得它们在功率受限应用中有利。

    Compensating for polarisation mode dispersion in optical transmission fibers
    6.
    发明授权
    Compensating for polarisation mode dispersion in optical transmission fibers 失效
    补偿光传输光纤中的偏振模色散

    公开(公告)号:US06707957B1

    公开(公告)日:2004-03-16

    申请号:US10024996

    申请日:2001-12-18

    Abstract: Compensating for polarization mode dispersion in a birefringent optical transmission fibre is achieved by controlling the birefringence of the fibre. The difference in group velocity of the orthogonal polarization states of an optical signal transmitted over the fibre is monitored to generate an error signal representing the difference. The birefringence of the fibre is adjusted accordingly to minimize the difference and thereby provide dynamic compensation. Birefringence control may be achieved by a non-linear fibre grating written into the fibre to impose a differential time delay. The fibre may be a side hole fibre (SHF), a holey fibre (HF), a photonic crystal fibre (PCF), or any other suitable microstructure fibre. The fibre may have stressing rods, may be tapered along its length and may be controlled electrically, mechanically, acoustically or thermally by spaced heating elements.

    Abstract translation: 通过控制纤维的双折射来实现双折射光传输光纤中的偏振模色散的补偿。 监测通过光纤传输的光信号的正交偏振状态的组速度差异,以产生表示差的误差信号。 相应地调节纤维的双折射以使差异最小化,从而提供动态补偿。 双折射控制可以通过写入光纤中的非线性光纤光栅实现,以施加差分时间延迟。 纤维可以是侧孔纤维(SHF),多孔纤维(HF),光子晶体纤维(PCF)或任何其它合适的微结构纤维。 纤维可以具有应力杆,其可以沿着其长度成锥形,并且可以通过间隔开的加热元件电,机械,声学或热控制。

    Fiber fuse protection
    7.
    发明授权

    公开(公告)号:US06526192B2

    公开(公告)日:2003-02-25

    申请号:US09747690

    申请日:2000-12-22

    CPC classification number: H04J14/02 G02B6/264

    Abstract: An optical component for halting the propagation of a fiber fuse through a transmission fiber has a threshold power level which is greater than the transmission power level of the system for that transmission fiber. The component comprises a fiber which is selected such that it is unable to propagate a fiber fuse when the power is below the threshold power level. The component is designed by selecting values of the core diameter and the higher mode cutoff wavelength of the fiber making up the component. If power surges are experienced which exceed the transmission power level (the transmission fiber being designed to operate at the transmission power levels without fiber fuses being initiated) then the component provide a safety margin.

    Distributed optical fibre sensor
    8.
    发明授权
    Distributed optical fibre sensor 有权
    分布式光纤传感器

    公开(公告)号:US09110018B2

    公开(公告)日:2015-08-18

    申请号:US13992578

    申请日:2011-12-06

    Inventor: Vincent Handerek

    Abstract: There is disclosed a distributed optical fiber sensor arranged to deliver probe light pulses of different wavelengths into corresponding different sensing optical fibers, and to determine one or more parameters as functions of position along each of the sensing fibers from detected backscattered light of each corresponding wavelength. In another arrangement, the different wavelengths are directed in different corresponding directions around a loop of sensing optical fiber.

    Abstract translation: 公开了一种布置成将不同波长的探测光脉冲传送到相应的不同感测光纤中的分布式光纤传感器,并且从每个相应波长的检测到的反向散射光中确定一个或多个参数作为沿每个感测光纤的位置的函数。 在另一种布置中,不同的波长围绕传感光纤的环路在不同的相应方向上被引导。

    Distributed Optical Fibre Sensor
    9.
    发明申请
    Distributed Optical Fibre Sensor 有权
    分布式光纤传感器

    公开(公告)号:US20130222811A1

    公开(公告)日:2013-08-29

    申请号:US13884017

    申请日:2010-11-09

    Inventor: Vincent Handerek

    Abstract: There is described a distributed optical fibre sensor for detecting one or more physical parameters indicative of an environmental influence on a sensor optical fibre, as a function of position along the sensor fibre. The sensor uses probe light pulses of different wavelengths. At least some of the probe light pulses may also be of different pulse lengths. The relative phase bias between interferometric signals in backscattered probe light of different wavelength pulses may also be controlled.

    Abstract translation: 描述了一种分布式光纤传感器,用于根据传感器光纤的位置来检测指示对传感器光纤的环境影响的一个或多个物理参数。 传感器使用不同波长的探针光脉冲。 至少一些探针光脉冲也可以具有不同的脉冲长度。 也可以控制不同波长脉冲的后向散射探测光中的干涉信号之间的相对相位偏差。

    Optical waveguide
    10.
    发明授权
    Optical waveguide 有权
    光波导

    公开(公告)号:US07136558B2

    公开(公告)日:2006-11-14

    申请号:US10425807

    申请日:2003-04-29

    Abstract: An optical fiber for communications systems, the fiber being designed to ensure a compensation of Kerr effects. The fiber has a profile which ensures that changes in power produce changes in distribution of power between core and cladding, such that the phase change associated with the changed spatial distribution of the power, is equal and opposite to the phase change due to Kerr Effect.

    Abstract translation: 用于通信系统的光纤,该光纤被设计成确保克尔效应的补偿。 光纤具有轮廓,其确保功率变化产生芯和包层之间的功率分布变化,使得与功率的变化的空间分布相关联的相位变化与由克尔效应引起的相位变化相等。

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