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    • 2. 发明申请
    • OPTICAL PULSE TRANSMISSION LINES
    • 光学脉冲传输线
    • WO2002098027A1
    • 2002-12-05
    • PCT/GB2002/002142
    • 2002-05-14
    • ASTON PHOTONIC TECHNOLOGIES LTD.TURITSYN, Sergei, KonstantinovichBENNION, Ian
    • TURITSYN, Sergei, KonstantinovichBENNION, Ian
    • H04B10/18
    • H04B10/25253
    • An optical pulse transmission line portion 10, having dispersion slope compensation, comprising an optical waveguide 12 (length L 1 , dispersion parameter D 1 ) having a dispersion slope parameter (S 1 ) of a first sign, and dispersion compensation means 14 (length L 2 , dispersion parameter D 2 ) having a dispersion slope parameter (S 2 ) of the opposite sign: The path average dispersion ( ) of the transmission line portion being: (D) optical pulse transmission line portion components and an optical pulse transmission line having dispersion slope compensation are also provided. A further aspect of the invention provides an optical pulse transmission line element, having dispersion compensation and dispersion slope compensation, comprising an optical waveguide (length L 1 , dispersion parameter D 1 , dispersion slope parameter S 1 ) and first and second dispersion compensation means (length L 2 , L 3 , dispersion parameters D 2 , D 3 , dispersion slope parameters S 2 , S 3 ). The path average dispersion ( ) of the transmission line element (total length L) being: (D) optical pulse transmission line element components and an optical pulse transmission line having dispersion compensation and dispersion slope compensation are provided by the invention.
    • 具有色散斜率补偿的光脉冲传输线部分10包括具有第一符号的色散斜率参数(S1)的光波导12(长度L1,色散参数D1)和色散补偿装置14(长度L2,色散参数 D2)具有相反符号的色散斜率参数(S2):传输线部分的路径平均色散()为:(D)光脉冲传输线部分分量和具有色散斜率补偿的光脉冲传输线 也提供。 本发明的另一方面提供一种具有色散补偿和色散斜率补偿的光脉冲传输线元件,包括光波导(长度L1,色散参数D1,色散斜率参数S1)和第一和第二色散补偿装置(长度L2, L3,色散参数D2,D3,色散斜率参数S2,S3)。 传输线路元件的路径平均色散(D)为(D)光脉冲传输线路元件和具有色散补偿和色散斜率补偿的光脉冲传输线由本发明提供。
    • 4. 发明申请
    • OPTICAL WAVEGUIDE GRATING DEVICE AND SENSORS UTILISING THE DEVICE
    • 光学波导光栅设备和传感器使用设备
    • WO2003107053A1
    • 2003-12-24
    • PCT/GB2003/002412
    • 2003-06-04
    • ASTON PHOTONIC TECHNOLOGIES LIMITEDALLSOP, Thomas, David, PaulWEBB, DavidBENNION, Ian
    • ALLSOP, Thomas, David, PaulWEBB, DavidBENNION, Ian
    • G02B6/16
    • G01K11/3206G01D5/35341G01D5/3538G02B6/02095G02B6/021G02B6/02204
    • An optical waveguide grating device comprising a progressive three-layered (PTL) fibre (22), within which a long period grating (LPG) (24) is provided. The LPG's attenuation bands associated with cladding modes up to the 23 rd radial mode, particularly cladding modes below mode order (15), are essentially insensitive to changes in the refractive index n s of a surrounding medium, but are sensitive to temperature. Attenuation bands associated with cladding modes greater than 26 have refractive index and temperature dependent sensitivity parameters which are non-zero. By appropriate selection of the cladding modes the device may be used to form a temperature sensor (30) or a refractive index sensor (20). A second grating device (50) comprises two LPGs (56, 58) provided in PTL fibre (52) in a spaced relationship to form an in-line Mach-Zehnder interferometer (60). The second device (50) may also be used to form a temperature or refractive index sensor (70).
    • 一种包括渐进三层(PTL)光纤(22)的光波导光栅装置,其中设置有长周期光栅(LPG)(24)。 与包层模式相关的LPG的衰减谱带,直到23径向模式,特别是低于模态阶数(15)的包层模式对周围介质的折射率ns的变化基本上不敏感,但对温度敏感。 与大于26的包层模式相关的衰减带具有非零的折射率和温度依赖灵敏度参数。 通过适当选择包层模式,该装置可用于形成温度传感器(30)或折射率传感器(20)。 第二光栅装置(50)包括以间隔开的关系设置在PTL光纤(52)中的两个LPG(56,58),以形成在线马赫 - 曾德干涉仪(60)。 第二装置(50)也可用于形成温度或折射率传感器(70)。
    • 8. 发明申请
    • A TORSION SENSOR
    • 扭转传感器
    • WO2008007062A3
    • 2008-03-13
    • PCT/GB2007002547
    • 2007-07-09
    • UNIV ASTONBENNION IANZHOU KAIMINGCHEN XIANFENGZHANG LIN
    • BENNION IANZHOU KAIMINGCHEN XIANFENGZHANG LIN
    • G01L1/00
    • G01M11/088G01L3/12
    • A torsion sensor (1) using an optical waveguide (2) in optical communication with a diffraction grating (3), preferably a tilted grating, and most preferably a tilted Bragg grating, which provides the optical waveguide and grating with a torsion-dependent collective optical transmission spectrum. Changes in the collective optical transmission spectrum of the waveguide and grating, induced by changes in the amount of torsion applied to the waveguide, may be detected (12) by detecting a corresponding change in the intensity of optical radiation transmitted through the grating from a controlled optical source (5). The degree of change in the collective optical transmission spectrum is dependent upon the degree of torsion (twist) applied to the optical waveguide. Measuring the magnitude and/or sense (i.e. increase/decrease) in the intensity of optical radiation transmitted through the grating from an optical source enables torsion to be sensed.
    • 一种使用与衍射光栅(3)光学通信的光波导(2)的扭转传感器(1),优选为倾斜光栅,并且最优选为倾斜布拉格光栅,其为光波导和光栅提供扭转相关集合 光传输频谱。 通过检测通过光栅传输的光辐射强度的相应变化,可以检测(12)由施加到波导的扭转量的变化引起的波导和光栅的集体光透射频谱的变化 光源(5)。 集体光传输频谱的变化程度取决于施加到光波导的扭曲程度(扭曲)。 测量从光源通过光栅透射的光辐射的强度的量值和/或感测(即增加/减少)使得能够感测扭转。
    • 9. 发明申请
    • SURFACE PLASMONS
    • 表面处理
    • WO2008007115A2
    • 2008-01-17
    • PCT/GB2007/002643
    • 2007-07-13
    • ASTON UNIVERSITYALLSOP, Thomas, David, PaulWEBB, David, JohnNEAL, RonaldBENNION, Ian
    • ALLSOP, Thomas, David, PaulWEBB, David, JohnNEAL, RonaldBENNION, Ian
    • G01N21/55
    • G02B6/1226B82Y20/00G01N21/553G01N21/7743G02B6/02G02B6/02085G02B6/021G02B6/02104
    • The generation of surface plasmons on a metal layer (18) arranged upon an outer surface of an optical waveguide (11), using light (22) reflected from inside the optical waveguide (15). The reflected light is may be a reflected part of guided light travelling along the optical waveguide and may be a back-reflected (e.g. obliquely back-reflected) part of the guided light. The reflected part of guided light may form a radiative optical mode(s) which is used to excite surface plasmons and which is also coupled to the remaining guided mode(s) of the light (21, 23) from which it derives. This coupling of the radiation mode(s) and the guided mode(s) enables changes in the radiation mode(s) to cause consequential changes in the guided mode(s) of light. Such changes in the radiation mode(s) may occur due to the coupling of the reflected mode(s) to the surface plasmons they excite at the metal layer.
    • 使用从光波导(15)内部反射的光(22)在布置在光波导(11)的外表面上的金属层(18)上产生表面等离子体激元。 反射光可以是沿着光波导传播的引导光的反射部分,并且可以是被引导光的反射(例如斜后反射)部分。 引导光的反射部分可以形成用于激发表面等离子体激元的辐射光学模式,并且其还耦合到其从其导出的光(21,23)的剩余引导模式。 辐射模式和引导模式的这种耦合使得能够改变辐射模式以引起光的导向模式的相应变化。 辐射模式的这种变化可能由于反射模式与在金属层上激发的表面等离子体激元的耦合而发生。