公开(公告)号：US08493556B2

公开(公告)日：2013-07-23

申请号：US13344065

申请日：2012-01-05

申请人： Ming-Jun Li ,  Shenping Li ,  Xiaobin Wang

发明人： Ming-Jun Li ,  Shenping Li ,  Xiaobin Wang

IPC分类号： G01N21/00

CPC分类号： G01K11/32 ,  G01L1/246

摘要： Some embodiments of a distributed Brillouin optical fiber sensing system employs a sensing optical fiber that supports two or more (i.e., few) guided modes. Pump light supported by one of the guided modes is used to form a dynamic Brillouin grating (DBG). Probe light supported by at least one of the other guided modes interacts with the DBG to form reflected probe light that is received and analyzed to determine a Brillouin frequency shift, a phase matching wavelength between probe and pump light, a reflection location, which in turn allows for making a measurement of at least one condition along the sensing optical fiber. Supporting the pump and probe light in different guided modes results in the optical fiber sensing system being able to simultaneously measure temperature and strain and having a higher spatial resolution than sensing systems where the pump light and probe light share a common guided mode.

摘要翻译： 分布式布里渊光纤感测系统的一些实施例采用支持两个或更多（即少数）导模的传感光纤。 由一个引导模式支持的泵浦光用于形成动态布里渊光栅（DBG）。 由其他引导模式中的至少一个支撑的探测光与DBG相互作用以形成被接收和分析的反射探测光，以确定布里渊频移，探针与泵浦光之间的相位匹配波长，反射位置 允许沿着感测光纤测量至少一个条件。 以不同的导向模式支持泵浦和探测光，导致光纤感测系统能够同时测量温度和应变，并且具有比泵浦光和探针光共享共同引导模式的感测系统更高的空间分辨率。

公开(公告)号：US08493555B2

公开(公告)日：2013-07-23

申请号：US13097201

申请日：2011-04-29

申请人： Ming-Jun Li ,  Shenping Li ,  Xiaobin Wang

发明人： Ming-Jun Li ,  Shenping Li ,  Xiaobin Wang

IPC分类号： G01N21/00

CPC分类号： G01K11/32 ,  G01L1/246

摘要： A distributed Brillouin optical fiber sensing system employs a sensing optical fiber that supports two or more (i.e., few) guided modes. Pump light supported by one of the guided modes is used to form a dynamic Brillouin grating (DBG). Probe light supported by at least one of the other guided modes interacts with the DBG to form reflected probe light that is received and analyzed to determine a Brillouin frequency shift and a reflection location, which in turn allows for making a measurement of at least one condition along the sensing optical fiber. Supporting the pump and probe light in different guided modes results in the optical fiber sensing system having a higher spatial resolution than sensing systems where the pump light and probe light share a common guided mode.

摘要翻译： 分布式布里渊光纤感测系统采用支持两个或更多（即少数）导模的传感光纤。 由一个引导模式支持的泵浦光用于形成动态布里渊光栅（DBG）。 由其他引导模式中的至少一个支撑的探测光与DBG相互作用以形成被接收和分析的反射探测光，以确定布里渊频移和反射位置，其反过来允许进行至少一个条件的测量 沿传感光纤。 以不同的导向模式支持泵浦和探测光，导致光纤传感系统具有比泵浦光和探针光共享共同引导模式的传感系统更高的空间分辨率。

公开(公告)号：US20120274926A1

公开(公告)日：2012-11-01

申请号：US13097201

申请日：2011-04-29

申请人： Ming-Jun Li ,  Shenping Li ,  Xiaobin Wang

发明人： Ming-Jun Li ,  Shenping Li ,  Xiaobin Wang

IPC分类号： H01S3/30 ,  G01N21/25

CPC分类号： G01K11/32 ,  G01L1/246

摘要： A distributed Brillouin optical fiber sensing system employs a sensing optical fiber that supports two or more (i.e., few) guided modes. Pump light supported by one of the guided modes is used to form a dynamic Brillouin grating (DBG). Probe light supported by at least one of the other guided modes interacts with the DBG to form reflected probe light that is received and analyzed to determine a Brillouin frequency shift and a reflection location, which in turn allows for making a measurement of at least one condition along the sensing optical fiber. Supporting the pump and probe light in different guided modes results in the optical fiber sensing system having a higher spatial resolution than sensing systems where the pump light and probe light share a common guided mode.

摘要翻译： 分布式布里渊光纤感测系统采用支持两个或更多（即少数）导模的传感光纤。 由一个引导模式支持的泵浦光用于形成动态布里渊光栅（DBG）。 由其他引导模式中的至少一个支撑的探测光与DBG相互作用以形成被接收和分析的反射探测光，以确定布里渊频移和反射位置，其反过来允许进行至少一个条件的测量 沿传感光纤。 以不同的导向模式支持泵浦和探测光，导致光纤传感系统具有比泵浦光和探针光共享共同引导模式的传感系统更高的空间分辨率。

公开(公告)号：US20120274927A1

公开(公告)日：2012-11-01

申请号：US13344065

申请日：2012-01-05

申请人： Ming-Jun Li ,  Shenping Li ,  Xiaobin Wang

发明人： Ming-Jun Li ,  Shenping Li ,  Xiaobin Wang

IPC分类号： G01N21/25

CPC分类号： G01K11/32 ,  G01L1/246

摘要： Some embodiments of a distributed Brillouin optical fiber sensing system employs a sensing optical fiber that supports two or more (i.e., few) guided modes. Pump light supported by one of the guided modes is used to form a dynamic Brillouin grating (DBG). Probe light supported by at least one of the other guided modes interacts with the DBG to form reflected probe light that is received and analyzed to determine a Brillouin frequency shift, a phase matching wavelength between probe and pump light, a reflection location, which in turn allows for making a measurement of at least one condition along the sensing optical fiber. Supporting the pump and probe light in different guided modes results in the optical fiber sensing system being able to simultaneously measure temperature and strain and having a higher spatial resolution than sensing systems where the pump light and probe light share a common guided mode.

摘要翻译： 分布式布里渊光纤感测系统的一些实施例采用支持两个或更多（即少数）导模的传感光纤。 由一个引导模式支持的泵浦光用于形成动态布里渊光栅（DBG）。 由其他引导模式中的至少一个支撑的探测光与DBG相互作用以形成被接收和分析的反射探测光，以确定布里渊频移，探针与泵浦光之间的相位匹配波长，反射位置 允许沿着感测光纤测量至少一个条件。 以不同的导向模式支持泵浦和探测光，导致光纤感测系统能够同时测量温度和应变，并且具有比泵浦光和探针光共享共同引导模式的感测系统更高的空间分辨率。

公开(公告)号：US20130229649A1

公开(公告)日：2013-09-05

申请号：US13409310

申请日：2012-03-01

申请人： Ming-Jun Li ,  Shenping Li ,  Richard Stephen Vodhanel

发明人： Ming-Jun Li ,  Shenping Li ,  Richard Stephen Vodhanel

IPC分类号： G01N21/49 ,  G01N21/17

CPC分类号： G01M5/0091 ,  G01D5/35364 ,  G01K11/32

摘要： According to one embodiment, an optical sensing system may include a gated optical amplifier, one or more triggering devices, and an optical coupler. The gated optical amplifier can receive a pulse signal and transform the pulse signal into an amplified pulse signal having an amplified peak portion. The triggering devices can control the gated optical amplifier such that the gated optical amplifier is in the lossy state while the baseline portion of the pulse signal is transformed and the gated optical amplifier is in the gain state while the peak portion of the pulse signal is transformed. The amplified pulse signal can be transmitted to the sensing optical fiber and a sensed optical signal can be received, when the sensing optical fiber is connected to the optical coupler. Optionally, a second pulse signal and the sensed optical signal can be combined and detected with a coherent balanced detection technique.

摘要翻译： 根据一个实施例，光学感测系统可以包括门控光放大器，一个或多个触发装置和光耦合器。 门控光放大器可以接收脉冲信号并将脉冲信号转换成具有放大峰值部分的放大脉冲信号。 触发装置可以控制门控光放大器，使得门控光放大器处于损耗状态，而脉冲信号的基线部分被变换，并且门控光放大器处于增益状态，同时脉冲信号的峰值部分被变换 。 当感测光纤连接到光耦合器时，放大的脉冲信号可以传输到感测光纤并且可以接收感测的光信号。 可选地，可以用相干平衡检测技术组合并检测第二脉冲信号和感测到的光信号。

公开(公告)号：US20110121202A1

公开(公告)日：2011-05-26

申请号：US12623973

申请日：2009-11-23

申请人： Ming-Jun Li ,  Shenping Li

发明人： Ming-Jun Li ,  Shenping Li

IPC分类号： G01J1/58

CPC分类号： G01J3/10 ,  G01J3/4406 ,  H01S3/0057 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/2383

摘要： A nonlinear fluorescence imaging system and method for generating fluorescence imaging includes a pulsed laser source for generating laser pulses at a first wavelength and an optical pulse stretcher including one or more optical pulse stretcher fibers having a first dispersion parameter at the first wavelength. The system also includes a probe for interfacing with a sample to deliver the laser pulses and extract fluorescence signals excited in the sample. One or more optical delivery fibers are included for delivering the laser pulses and collecting nonlinear fluorescence signals. The optical delivery fiber has a second dispersion parameter at the first wavelength which is opposite a polarity of the first dispersion parameter. A detector detects images based on the collected fluorescence signals.

摘要翻译： 用于产生荧光成像的非线性荧光成像系统和方法包括用于产生第一波长的激光脉冲的脉冲激光源和包括具有第一波长的第一色散参数的一个或多个光脉冲展宽光纤的光脉冲展宽器。 该系统还包括用于与样品接口以传送激光脉冲并提取在样品中激发的荧光信号的探针。 包括一个或多个光学传递光纤用于传送激光脉冲和收集非线性荧光信号。 光传送光纤具有与第一色散参数的极性相反的第一波长的第二色散参数。 检测器基于收集的荧光信号检测图像。

公开(公告)号：US07339721B1

公开(公告)日：2008-03-04

申请号：US11712159

申请日：2007-02-28

申请人： George Edward Berkey ,  Ming-Jun Li ,  Shenping Li ,  Daniel Aloysius Nolan

发明人： George Edward Berkey ,  Ming-Jun Li ,  Shenping Li ,  Daniel Aloysius Nolan

IPC分类号： G02F2/02 ,  G02B6/036

CPC分类号： G02F1/3536 ,  G02B6/03605 ,  G02B6/03644 ,  G02F1/365 ,  G02F2001/354

摘要： An optical-fiber-based light source that generates light via third-harmonic (TH) generation is disclosed. The light source includes a pump light source that provides pump light having a fundamental mode of wavelength λP. The light source also includes an optical fiber optically coupled to the pump light source. The optical fiber's core refractive index profile has (i) a central region with a refractive index value Δ1, (ii) a first annular region immediately surrounding the central region and having a refractive index value Δ2, and (iii) a second annular region immediately surrounding the first annular region and having a refractive index value Δ3. The optical fiber satisfies the conditions Δ2 1.2%. The pump light produces TH-generated light having a higher-order mode of wavelength λTH=(1/3)λP and that is outputted at the optical fiber output end. The pump light fundamental mode overlaps the TH-generated-light higher order mode over the length of the optical fiber to provide a conversion efficiency of 1% or greater.

摘要翻译： 公开了一种通过三次谐波（TH）产生光产生光的基于光纤的光源。 光源包括提供具有波长λ基波模式的泵浦光的泵浦光源。 光源还包括光学耦合到泵浦光源的光纤。 光纤的芯折射率分布具有（i）折射率值为Δ1的中心区域，（ii）直接围绕中心区域并具有折射率值Delta 2 ，和（iii）紧邻环绕第一环形区域并具有折射率值Δ3的第二环形区域。 光纤满足条件ΔΔ2<1>和Δ2<3> 3> 3，并且max {Delta 1/2> 3＆lt; 3＆gt;＆Delta;＆Delta; 2＆CenterDot;＆CenterDot;＆CenterDot;＆CenterDot;＆CenterDot; 泵浦光产生TH产生的光，其具有高阶模式的波长λ=（1/3）λP＆lt; P＆gt;，并且在光纤输出端输出 。 泵浦光基本模式在光纤长度上与TH生成光高阶模式重叠，以提供1％或更大的转换效率。

公开(公告)号：US09574911B2

公开(公告)日：2017-02-21

申请号：US13658991

申请日：2012-10-24

申请人： Brett Jason Hoover ,  Ming-Jun Li ,  Shenping Li

发明人： Brett Jason Hoover ,  Ming-Jun Li ,  Shenping Li

IPC分类号： G02B6/02 ,  G01J1/04 ,  G01D5/353 ,  G01J5/08 ,  G01K11/32 ,  G02B6/028 ,  G02B6/036

CPC分类号： G01N21/636 ,  G01D5/35303 ,  G01D5/35364 ,  G01D5/35383 ,  G01J5/0821 ,  G01K11/32 ,  G01K11/3206 ,  G01K2011/322 ,  G01L1/242 ,  G01N2021/638 ,  G01N2201/088 ,  G02B6/02042 ,  G02B6/0281 ,  G02B6/0365

摘要： A two-core optical fiber is provided for use in Brillouin distributed fiber sensor applications and systems. The two-core fiber includes a first and second core. Each core is configured to exhibit a Brillouin frequency shift greater than 30 Mhz relative to the other core. Further, each core possesses temperature and strain coefficients that differ from the other core. The cores can be configured to produce Brillouin frequency shift levels of at least 30 Mhz relative to one another. These differences in shift levels may be effected by adjustment of the material compositions, doping concentrations and/or refractive index profiles of each of the cores. These optical fibers may also be used in BOTDR- and BOTDA-based sensor systems and arrangements.

摘要翻译： 提供两芯光纤用于布里渊分布式光纤传感器应用和系统。 双芯光纤包括第一和第二芯。 每个核心被配置为相对于另一个核心展现大于30Mhz的布里渊频移。 此外，每个核心具有不同于另一核心的温度和应变系数。 核心可以被配置为相对于彼此产生至少30Mhz的布里渊频移水平。 这些偏移水平的差异可以通过调整每个芯的材料组成，掺杂浓度和/或折射率分布来实现。 这些光纤也可用于基于BOTDR和BOTDA的传感器系统和布置。

公开(公告)号：US08948550B2

公开(公告)日：2015-02-03

申请号：US13401239

申请日：2012-02-21

申请人： Ming-Jun Li ,  Shenping Li

发明人： Ming-Jun Li ,  Shenping Li

IPC分类号： G02B6/12

CPC分类号： G01K11/32 ,  G01D5/35364 ,  G01L1/246 ,  G02B6/02009 ,  G02B6/03611

摘要： A sensing optical fiber comprising: a few-moded multi-segment core, said core comprising one core segment surrounded by another core segment, and at least one cladding surrounding said core; said core having an F factor (μm2) of 100 μm2 to 350 μm2, and is constructed to provide (i) an overlap integral between the fundamental optical guided mode and the fundamental acoustic guided mode of greater than 0.7 and (ii) the overlap integral between the LP11 optical guided mode and the fundamental acoustic guided mode at least 0.45.

摘要翻译： 一种感测光纤，包括：多模多芯芯，所述芯包括由另一芯部段包围的一个芯部段和围绕所述芯的至少一个包层; 所述芯具有100μm2至350μm2的F因子（μm2），并且被构造成提供（i）基本光学引导模式和基本声导引模式之间的重叠积分大于0.7，以及（ii）重叠积分 在LP11光导模式和基本声导模之间至少为0.45。

公开(公告)号：US20140042306A1

公开(公告)日：2014-02-13

申请号：US13658991

申请日：2012-10-24

申请人： Brett Jason Hoover ,  Ming-Jun Li ,  Shenping Li

发明人： Brett Jason Hoover ,  Ming-Jun Li ,  Shenping Li

IPC分类号： G02B6/02 ,  G01J1/04

CPC分类号： G01N21/636 ,  G01D5/35303 ,  G01D5/35364 ,  G01D5/35383 ,  G01J5/0821 ,  G01K11/32 ,  G01K11/3206 ,  G01K2011/322 ,  G01L1/242 ,  G01N2021/638 ,  G01N2201/088 ,  G02B6/02042 ,  G02B6/0281 ,  G02B6/0365

摘要： A two-core optical fiber is provided for use in Brillouin distributed fiber sensor applications and systems. The two-core fiber includes a first and second core. Each core is configured to exhibit a Brillouin frequency shift greater than 30 Mhz relative to the other core. Further, each core possesses temperature and strain coefficients that differ from the other core. The cores can be configured to produce Brillouin frequency shift levels of at least 30 Mhz relative to one another. These differences in shift levels may be effected by adjustment of the material compositions, doping concentrations and/or refractive index profiles of each of the cores. These optical fibers may also be used in BOTDR- and BOTDA-based sensor systems and arrangements.

摘要翻译： 提供两芯光纤用于布里渊分布式光纤传感器应用和系统。 双芯光纤包括第一和第二芯。 每个核心被配置为相对于另一个核心展现大于30Mhz的布里渊频移。 此外，每个核心具有不同于另一核心的温度和应变系数。 核心可以被配置为相对于彼此产生至少30Mhz的布里渊频移水平。 这些偏移水平的差异可以通过调整每个芯的材料组成，掺杂浓度和/或折射率分布来实现。 这些光纤也可用于基于BOTDR和BOTDA的传感器系统和布置。