公开(公告)号：US06417507B1

公开(公告)日：2002-07-09

申请号：US09460715

申请日：1999-12-14

申请人： Alan Malvern ,  Thomas Allsop ,  Ronald Neal

发明人： Alan Malvern ,  Thomas Allsop ,  Ronald Neal

IPC分类号： G01J142

CPC分类号： G01L1/246 ,  G01D5/35316

摘要： A modulated fibre Bragg grating strain gauge assembly for absolute gauging of strain including at least one sensor element (1) in the form of a length of optical fibre containing, along part its length, means for partially reflecting light (1a), means for generating and passing a beam of light (2a) with a spectral feature less than 0.1 nanometers in width into the at least one sensor element (1) where reflection takes place, which reflection is a substantially sinusoidal intensity variation in wavelength over a range of from 2 to 3 nanometers comprising at least two substantially sinusoidal periods such that as the at least one sensor element sustains a change in length resulting from a strain thereon, the reflected intensity varies substantially sinusoidally along the at least two sinusoidal periods, means for receiving and processing the reflected light (2b) to establish the light intensity values at one (1f) and two times (2f) a modulation frequency (1f) applied to the means for generating the beam of light (2a), and means to determine an absolute direction and magnitude of strain from a ratio of the intensity values 1f:2f.

摘要翻译： 一种用于绝对测量应变的调制光纤布拉格光栅应变计组件，包括至少一根光纤长度的传感器元件（1），其长度部分包含用于部分反射光（1a）的装置，用于产生 以及将具有小于0.1纳米宽度的光谱特征的光束（2a）传送到发生反射的至少一个传感器元件（1）中，该反射是在2范围内的波长上的基本正弦波强度变化 包括至少两个基本上正弦的周期，使得当至少一个传感器元件维持由其上的应变导致的长度变化时，反射强度沿着至少两个正弦周期基本上正弦地变化，用于接收和处理 反射光（2b），以在第一（1f）和二次（2f）处建立应用于基因装置的调制频率（1f）的光强度值 消除光束（2a），以及从强度值1f：2f的比率确定应变的绝对方向和大小的装置。

公开(公告)号：US20090303489A1

公开(公告)日：2009-12-10

申请号：US12306225

申请日：2007-07-13

申请人： Thomas David Paul Allsop ,  David John Webb ,  Ronald Neal ,  Ian Bennion

发明人： Thomas David Paul Allsop ,  David John Webb ,  Ronald Neal ,  Ian Bennion

IPC分类号： G01N21/55

CPC分类号： G02B6/1226 ,  B82Y20/00 ,  G01N21/553 ,  G01N21/7743 ,  G02B6/02 ,  G02B6/02085 ,  G02B6/021 ,  G02B6/02104

摘要： The generation of surface plasmons on a metal layer arranged upon an outer surface of an optical waveguide, using light reflected from inside the optical waveguide. The reflected light 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 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.

摘要翻译： 使用从光波导内部反射的光，在布置在光波导的外表面上的金属层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导向光的反射部分，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辐射光学模式，其用于激发表面等离子体激元，并且还耦合到其衍生的光的剩余引导模式。 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。 由于反射模式与它们在金属层上激发的表面等离子体激元的耦合，可能会发生辐射模式的这种变化。

公开(公告)号：US20110116094A1

公开(公告)日：2011-05-19

申请号：US12743036

申请日：2008-11-04

申请人： Thomas David Paul Allsop ,  Ian Bennion ,  David John Webb ,  Ronald Neal

发明人： Thomas David Paul Allsop ,  Ian Bennion ,  David John Webb ,  Ronald Neal

IPC分类号： G01N21/55 ,  G02F1/295 ,  G02B1/12

CPC分类号： G01N21/553 ,  B82Y20/00 ,  G01N21/7743 ,  G01N2021/258 ,  G02B6/1226

摘要： Surface plasmon generation on a metal or semiconductor layer at an outer surface of an optical waveguide, using light reflected or scattered from inside the optical waveguide. One aspect provides a main optical waveguide (11) (e.g. optical fibre) having a second optical waveguide (18) adhered thereto, the second optical waveguide including an optically transparent material (610) separating two surface plasmon supporting layers (600, 620). Another aspect provides a surface plasmon supporting layer of material(s) adhered to the main optical waveguide, the layer having photo-induced regions of material compaction. The regions of compaction may cause un-inscribed refractive index modulations in the main optical waveguide. The surface plasmons are coupled to the guided mode(s) in the main optical waveguide. Surface plasmon resonance depends on sample material in contact with an outermost surface plasmon supporting layer. Properties of the sample material can thus be detected in output guided mode(s) because of the coupling with the generated surface plasmons.

摘要翻译： 使用从光波导内部反射或散射的光在光波导的外表面上的金属或半导体层上产生表面等离子体。 一方面提供一种具有粘附到其上的第二光波导（18）的主光波导（11）（例如光纤），第二光波导包括分离两个表面等离子体支撑层（600,620）的光学透明材料（610）。 另一方面提供了粘附到主光波导的材料的表面等离子体支撑层，该层具有光诱导材料压实区域。 压实区域可能在主光波导中引起未内切的折射率调制。 表面等离子体激元与主光波导中的引导模式耦合。 表面等离子体共振取决于与最外表面等离子体支撑层接触的样品材料。 因此，由于与产生的表面等离子体激元的耦合，因此可以在输出引导模式中检测样品材料的特性。