Slow-light fiber Bragg grating sensor
    1.
    发明授权
    Slow-light fiber Bragg grating sensor 有权
    慢光纤布拉格光栅传感器

    公开(公告)号:US08797540B2

    公开(公告)日:2014-08-05

    申请号:US13224985

    申请日:2011-09-02

    IPC分类号: G01B9/02

    摘要: In certain embodiments, an optical device and a method of use is provided. The optical device can include a fiber Bragg grating and a narrowband optical source. The narrowband optical source can be configured to generate light. A first portion of light can be transmitted along a first optical path extending along and through the length of the fiber Bragg grating at a group velocity. The light can have a wavelength at or in the vicinity of a wavelength at which one or more of the following quantities is at a maximum value: (a) the product of the group index spectrum and a square root of the power transmission spectrum, (b) the slope of a product of the group index spectrum and one minus the power transmission spectrum, and (c) the slope of a product of the group index spectrum and the power transmission spectrum.

    摘要翻译: 在某些实施例中,提供了光学装置和使用方法。 光学装置可以包括光纤布拉格光栅和窄带光源。 窄带光源可以被配置为产生光。 光的第一部分可以沿着沿着光纤布拉格光栅的长度延伸并以组速度延伸的第一光路传输。 光可以具有在以下一个或多个以下量处于最大值的波长附近或附近的波长:(a)功率透射光谱的组折射谱和平方根的乘积( b)组索引谱和1减去功率透射谱的乘积的斜率,以及(c)组索引谱和功率透射光谱的乘积的斜率。

    Optical device with fiber Bragg grating and narrowband optical source
    2.
    发明授权
    Optical device with fiber Bragg grating and narrowband optical source 有权
    具有光纤布拉格光栅和窄带光源的光器件

    公开(公告)号:US09019482B2

    公开(公告)日:2015-04-28

    申请号:US12792631

    申请日:2010-06-02

    摘要: In certain embodiments, an optical device and a method of use is provided. The optical device includes a fiber Bragg grating having a substantially periodic refractive index modulation along a length of the fiber Bragg grating. The fiber Bragg grating has a power transmission spectrum with a plurality of local transmission minima, wherein each pair of neighboring local transmission minima has a local transmission maximum therebetween. The local transmission maximum has a maximum power at a transmission peak wavelength. The optical device further includes a narrowband optical source in optical communication with a first optical path and a second optical path. The narrowband optical source is configured to generate light having a wavelength at or in the vicinity of a local transmission maximum or at or in the vicinity of a wavelength at which the power transmission spectrum has a maximum slope between a local transmission maximum and either one of two local transmission minima neighboring the local transmission maximum.

    摘要翻译: 在某些实施例中,提供了光学装置和使用方法。 光学装置包括光纤布拉格光栅,其具有沿着光纤布拉格光栅的长度的基本上周期性的折射率调制。 光纤布喇格光栅具有多个局部透射最小值的功率透射光谱,其中每对相邻的局部透射最小值在其间具有局部透射最大值。 本地传输最大值在传输峰值波长处具有最大功率。 光学装置还包括与第一光路和第二光路光学通信的窄带光源。 窄带光源被配置为产生具有在本地发射最大值附近或附近的波长的光,或者在功率透射光谱具有局部透射最大值与本发明最大值之间的最大斜率的波长附近或附近 两个本地传输最小值相邻本地传输最大值。

    SLOW-LIGHT FIBER BRAGG GRATING SENSOR
    3.
    发明申请
    SLOW-LIGHT FIBER BRAGG GRATING SENSOR 有权
    慢光纤BRAGG光栅传感器

    公开(公告)号:US20120086934A1

    公开(公告)日:2012-04-12

    申请号:US13224985

    申请日:2011-09-02

    IPC分类号: G01B11/16 G01N21/00

    摘要: In certain embodiments, an optical device and a method of use is provided. The optical device can include a fiber Bragg grating and a narrowband optical source. The narrowband optical source can be configured to generate light. A first portion of light can be transmitted along a first optical path extending along and through the length of the fiber Bragg grating at a group velocity. The light can have a wavelength at or in the vicinity of a wavelength at which one or more of the following quantities is at a maximum value: (a) the product of the group index spectrum and a square root of the power transmission spectrum, (b) the slope of a product of the group index spectrum and one minus the power transmission spectrum, and (c) the slope of a product of the group index spectrum and the power transmission spectrum.

    摘要翻译: 在某些实施例中,提供了光学装置和使用方法。 光学装置可以包括光纤布拉格光栅和窄带光源。 窄带光源可以被配置为产生光。 光的第一部分可以沿着沿着光纤布拉格光栅的长度延伸并以组速度延伸的第一光路传输。 光可以具有在以下一个或多个以下量处于最大值的波长附近或附近的波长:(a)功率透射光谱的组折射谱和平方根的乘积( b)组索引谱和1减去功率透射谱的乘积的斜率,以及(c)组索引谱和功率透射光谱的乘积的斜率。

    Photonic-bandgap fiber with a core ring
    7.
    发明授权
    Photonic-bandgap fiber with a core ring 有权
    带有核心环的光子带隙光纤

    公开(公告)号:US07400806B2

    公开(公告)日:2008-07-15

    申请号:US11737683

    申请日:2007-04-19

    IPC分类号: G02B6/02

    摘要: A photonic-bandgap fiber includes a photonic crystal lattice with a material having a first refractive index and a pattern of regions formed therein. Each of the regions has a second refractive index lower than the first refractive index. The photonic-bandgap fiber further includes a core and a core ring surrounding the core and having an inner perimeter, an outer perimeter, and a thickness between the inner perimeter and the outer perimeter. The thickness is sized to reduce the number of ring surface modes supported by the core ring.

    摘要翻译: 光子带隙光纤包括具有第一折射率的材料和形成在其中的区域的图案的光子晶格。 每个区域具有低于第一折射率的第二折射率。 光子带隙光纤还包括芯部和围绕芯部的芯环,并且具有内周边,外周边和内周边与外周边之间的厚度。 厚度的大小可以减小由芯环支撑的环表面模式的数量。

    Method for configuring air-core photonic-bandgap fibers free of surface modes
    8.
    发明授权
    Method for configuring air-core photonic-bandgap fibers free of surface modes 有权
    用于配置不含表面模式的空芯光子带隙光纤的方法

    公开(公告)号:US07110650B2

    公开(公告)日:2006-09-19

    申请号:US10938755

    申请日:2004-09-10

    IPC分类号: G02B6/20

    摘要: Coupling of core modes to surface modes in an air-core photonic-bandgap fiber (PBF) can cause large propagation losses. Computer simulations analyze the relationship between the geometry and the presence of surface modes in PBFs having a triangular hole pattern and identify ranges of core characteristic dimensions (e.g., radii) for which the fiber supports no surface modes (i.e., only core modes are present) over the entire wavelength range of the bandgap. In particular, for a hole spacing Λ and a hole radius ρ=0.47Λ, the core supports a single mode and supports no surface modes for core radii between about 0.68Λ and about 1.05Λ. The existence of surface modes can be predicted simply and expediently by studying either the bulk modes alone or the geometry of the fiber without requiring a full analysis of the defect modes.

    摘要翻译: 核心模式与空芯光子带隙光纤(PBF)中的表面模式的耦合可能导致较大的传播损耗。 计算机模拟分析了具有三角孔图案的PBF中的几何形状和表面模式的存在之间的关系,并且识别纤维不支持表面模式(即,仅存在核心模式)的核心特征尺寸(例如,半径)的范围, 在带隙的整个波长范围内。 特别地,对于孔间距λ和孔半径rho =0.47λ,核心支持单一模式,并且在大约0.68λ至大约1.05Lambda之间不支持核心半径的表面模式。 表面模式的存在可以通过单独研究单独的体模式或光纤的几何形状而不需要对缺陷模式进行全面分析来简单和方便地预测。

    Method of using a unidirectional crow gyroscope
    9.
    发明授权
    Method of using a unidirectional crow gyroscope 失效
    使用单向罗马陀螺仪的方法

    公开(公告)号:US08705044B2

    公开(公告)日:2014-04-22

    申请号:US13237591

    申请日:2011-09-20

    IPC分类号: G01C19/72

    CPC分类号: G01C19/727 G01C19/721

    摘要: A method for detecting rotation includes providing a plurality of resonant waveguides generally adjacent to one another and optically coupled to one another. Each resonant waveguide of the plurality of resonant waveguides is configured to allow light to propagate along the resonant waveguide in a planar path. The method further includes propagating light along each path in a clockwise direction or along each path in a counterclockwise direction.

    摘要翻译: 一种用于检测旋转的方法包括提供大体上彼此相邻并且彼此光学耦合的多个谐振波导。 多个谐振波导的每个谐振波导被配置为允许光在平面路径中沿着谐振波导传播。 该方法还包括沿着每个路径沿顺时针方向沿着逆时针方向沿着每个路径传播光。

    Optical fiber
    10.
    发明授权
    Optical fiber 有权
    光纤

    公开(公告)号:US08428412B2

    公开(公告)日:2013-04-23

    申请号:US12356510

    申请日:2009-01-20

    IPC分类号: G02B6/032

    摘要: An optical fiber includes a cladding with a material having a first refractive index and a pattern of regions formed therein. Each of the regions has a second refractive index lower than the first refractive index. The optical fiber further includes a core region and a core ring having an inner perimeter, an outer perimeter, and a thickness between the inner perimeter and the outer perimeter. The thickness is sized to reduce the number of ring surface modes supported by the core ring.

    摘要翻译: 光纤包括具有第一折射率的材料和其中形成的区域的图案的包层。 每个区域具有低于第一折射率的第二折射率。 光纤还包括芯区域和芯环,其具有内周边,外周边和内周边与外周边之间的厚度。 厚度的大小可以减小由芯环支撑的环表面模式的数量。