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    • 2. 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)。
    • 3. 发明申请
    • FIBRE GRATING SURFACE PLASMON SENSOR
    • 光纤表面等离子体传感器
    • WO2008007115A3
    • 2008-03-20
    • PCT/GB2007002643
    • 2007-07-13
    • UNIV ASTONALLSOP 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。
    • 4. 发明申请
    • OPTICAL WAVEGUIDE BASED SURFACE PROFILING APPARATUS
    • 基于光波导的表面型材设备
    • WO2004008963A1
    • 2004-01-29
    • PCT/GB2003/003256
    • 2003-07-23
    • ASTON PHOTONIC TECHNOLOGIES LTDALLSOP, Thomas, David, PaulEARTHROWL-GOULD, TimothyBENNION, Ian
    • ALLSOP, Thomas, David, PaulEARTHROWL-GOULD, TimothyBENNION, Ian
    • A61B5/103
    • G02B6/022A61B5/1077A61B5/1135G02B6/02095G02B6/29319G02B6/29322G02B6/29356
    • Surface profiling apparatus (10) according to one embodiment comprises three long period gratings (LPGs) (12, 14, 16) fabricated in progressive three layered (PTL) fibre (18) and embedded within a deformable carrier member (40) comprising a skeleton (42) provided between two sheets of flexible rubber skin (44, 46). The LPGs (12, 14, 16) are illuminated by three wavelength modulated, narrow bandwidth optical signals, each having a different wavelength and modulation frequency. A photodetector (26) connected to three lock-in amplifiers (28, 30, 32) measures the amplitudes of the first and second harmonic frequency components of the photodetector output signal corresponding to each LPG (12, 14, 16). Similar surface profiling apparatus (10) forms the basis for respiratory function monitoring apparatus (100) in which five LPGs are provided within each of four PTL fibres (104, 106, 108, 110) and embedded in four carrier members (40a-d) attached to a garment (114) to be worn by a subject.
    • 根据一个实施例的表面轮廓设备(10)包括以渐进三层(PTL)纤维(18)制造并嵌入在包括骨架的可变形载体构件(40)内的三个长周期光栅(LPG)(12,14,16) (42)设置在两片柔性橡胶表皮(44,46)之间。 LPG(12,14,16)由三个波长调制窄带宽光信号照亮,每个具有不同的波长和调制频率。 连接到三个锁定放大器(28,30,32)的光电检测器(26)测量对应于每个LPG(12,14,16)的光电检测器输出信号的第一和第二谐波频率分量的振幅。 类似的表面轮廓设备(10)形成呼吸功能监测设备(100)的基础,其中在四个PTL光纤(104,106,108,110)的每一个内提供五个LPG并嵌入四个载体构件(40a-d) 附着到要被受试者佩戴的衣服(114)上。
    • 6. 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。