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1. 发明授权

US08004686B2 Compensating for time varying phase changes in interferometric measurements 有权
公开(公告)号：US08004686B2
公开(公告)日：2011-08-23
申请号：US11792082
申请日：2005-12-13
申请人： Mark Froggatt , Dawn K. Gifford
发明人： Mark Froggatt , Dawn K. Gifford
IPC分类号： G01B9/02
CPC分类号： G01M11/3172 , G01M11/083
摘要： An optical device under test (DUT) is interferometrically measured. The DUT can include one or more of an optical fiber, an optical component, or an optical system. First interference pattern data for the DUT is obtained for a first path to the DUT, and second interference pattern data for the DUT is obtained for a second somewhat longer path to the DUT. Because of that longer length, the second interference pattern data is delayed in time from the first interference pattern data. A time varying component of the DUT interference pattern data is then identified from the first and second interference pattern data. The identified time varying component is used to modify the first or the second interference pattern data to compensate for the time-varying phase caused by vibrations, etc. One or more optical characteristics of the DUT may then be determined based on the modified interference pattern data.

2. 发明授权

US07948633B2 Compensating for time varying phase changes in interferometric measurements 有权
标题翻译：补偿干涉测量中的时变相位变化
公开(公告)号：US07948633B2
公开(公告)日：2011-05-24
申请号：US12805879
申请日：2010-08-23
申请人： Mark Froggatt , Dawn K. Gifford
发明人： Mark Froggatt , Dawn K. Gifford
IPC分类号： G01B9/02
CPC分类号： G01M11/3172 , G01M11/083
摘要： An optical device under test (DUT) is interferometrically measured. The DUT can include one or more of an optical fiber, an optical component, or an optical system. First interference pattern data for the DUT is obtained for a first path to the DUT, and second interference pattern data for the DUT is obtained for a second somewhat longer path to the DUT. Because of that longer length, the second interference pattern data is delayed in time from the first interference pattern data. A time varying component of the DUT interference pattern data is then identified from the first and second interference pattern data. The identified time varying component is used to modify the first or the second interference pattern data to compensate for the time-varying phase caused by vibrations, etc. One or more optical characteristics of the DUT may then be determined based on the modified interference pattern data.
摘要翻译：对被测光学器件（DUT）进行干涉测量。 DUT可以包括光纤，光学部件或光学系统中的一个或多个。对于DUT的第一路径获得DUT的第一干涉图案数据，并且获得用于DUT的第二干涉图案数据用于到DUT的第二更长的路径。由于该长度较长，所以第二干涉图案数据在时间上与第一干涉图案数据相比延迟。然后从第一和第二干涉图案数据识别DUT干涉图案数据的时变分量。所识别的时变分量用于修改第一或第二干涉图案数据以补偿由振动等引起的时变相位。然后可以基于经修改的干涉图案数据来确定DUT的一个或多个光学特性。

3. 发明申请

US20080007718A9 Polarization diversity detection without a polarizing beam splitter 有权
标题翻译：偏振分束器的极化分集检测
公开(公告)号：US20080007718A9
公开(公告)日：2008-01-10
申请号：US10520819
申请日：2003-07-08
申请人： Mark Froggatt , Brian Soller , Matthew Wolfe
发明人： Mark Froggatt , Brian Soller , Matthew Wolfe
IPC分类号： G01N21/00
CPC分类号： G01M11/331 , G01M11/3172 , G01M11/3181 , G01M11/337
摘要： A fiber optic measurement device including an optical frequency domain reflectometer (10) performs polarization diversity detection without using a polarizing beam splitter.
摘要翻译：包括光频域反射计（10）的光纤测量装置在不使用偏振分束器的情况下进行极化分集检测。

4. 发明申请

US20080002187A1 Distributed strain and temperature discrimination in polarization maintaining fiber 有权
标题翻译：保偏光纤中的分布应变和温度辨别
公开(公告)号：US20080002187A1
公开(公告)日：2008-01-03
申请号：US11808260
申请日：2007-06-07
申请人： Mark Froggatt
发明人： Mark Froggatt
IPC分类号： G01N21/00
CPC分类号： G01M11/3172 , G01D5/35361 , G01D5/3538 , G01K11/32 , G01L1/242
摘要： A portion of a polarization maintaining (PM) optical fiber having two polarization states is analyzed. First and second spectral responses of the PM fiber portion are determined. In a preferred implementation, the spectral responses are determined using Optical Frequency Domain Reflectometry (OFDR). Each polarization state of the PM fiber portion has a corresponding spectral component in the first spectral response. First and second spectral analyses of the PM fiber portion are performed using the first and second spectral responses. Based on those spectral analyses of the PM fiber portion, a first physical characteristic affecting the PM fiber portion is determined that is distinct from a second different physical characteristic affecting the fiber portion. Example physical characteristics include temperature and strain. An output signal related to the first physical characteristics affecting the fiber portion is provided, e.g., for display, further processing, etc.
摘要翻译：分析了具有两个极化状态的偏振维持（PM）光纤的一部分。确定PM纤维部分的第一和第二光谱响应。在优选实施例中，使用光频域反射计（OFDR）来确定光谱响应。 PM光纤部分的每个偏振状态在第一光谱响应中具有对应的光谱分量。使用第一和第二光谱响应来执行PM光纤部分的第一和第二光谱分析。基于PM光纤部分的光谱分析，确定影响PM光纤部分的第一物理特性，其不同于影响光纤部分的第二不同物理特性。物理特性包括温度和应变。提供与影响纤维部分的第一物理特性相关的输出信号，例如用于显示，进一步处理等。

5. 发明申请

US20060033927A1 Heterodyne optical spectrum analyzer 有权
标题翻译：异频光谱分析仪
公开(公告)号：US20060033927A1
公开(公告)日：2006-02-16
申请号：US10520818
申请日：2003-07-08
申请人： Mark Froggatt , Brian Soller , Matthew Wolfe
发明人： Mark Froggatt , Brian Soller , Matthew Wolfe
IPC分类号： G01B9/02
CPC分类号： G01J9/02 , G01J9/04
摘要： A heterodyne optical signal analyzer (HOSA) permits accurate reconstruction of an optical input signal (Es) in the time domain. In one embodiment, a vector representation of the light is used to account for two polarization states of the optical signal. The components of a heterodyne optical signal analyzer (10), including optical couplers (12), all have errors and offsets. For example, optical power detectors (16) are very sensitive to changes in polarization of the optical signal (Es) and of the reference signal (Er). Several HOSA calibration procedures including detector calibration, vector calibration, and reference signal calibration are described.
摘要翻译：外差光信号分析仪（HOSA）可以准确地重构时域中的光输入信号（Es）。在一个实施例中，光的矢量表示用于考虑光信号的两个偏振状态。包括光耦合器（12）的外差光信号分析器（10）的组件都具有错误和偏移。例如，光功率检测器（16）对光信号（Es）和参考信号（Er）的偏振变化非常敏感。描述了包括检测器校准，矢量校准和参考信号校准在内的几个HOSA校准程序。

6. 发明申请

US20050219512A1 Identifying optical fiber segments and determining characteristics of an optical device under test based on fiber segment scatter pattern data 有权
标题翻译：基于光纤段散点图数据识别光纤段并确定被测光学器件的特性
公开(公告)号：US20050219512A1
公开(公告)日：2005-10-06
申请号：US11062740
申请日：2005-02-23
申请人： Mark Froggatt , Brian Soller
发明人： Mark Froggatt , Brian Soller
IPC分类号： G01M11/00 , G01N21/00
CPC分类号： G01M11/3172
摘要： Complex data is obtained from OFDR backscatter measurements for an optical device under test (DUT). That complex scatter pattern data may be used along with a previously-determined fiber segment pattern to identify the fiber segment within the DUT, even when the DUT is an optical network DUT that includes multiple fibers coupled to perform one or more functions. In other non-limiting example applications, the OFDR scatter pattern data can be used to identify where in the DUT a loss occurred and where in the DUT a temperature change occurred.
摘要翻译：复合数据从被测光学器件（DUT）的OFDR后向散射测量获得。即使当DUT是包括耦合以执行一个或多个功能的多个光纤的光网络DUT时，该复杂散射图案数据也可以与先前确定的光纤段图案一起使用以识别DUT内的光纤段。在其他非限制性示例应用中，可以使用OFDR散射图数据来识别在DUT中发生损耗的位置以及在DUT中发生温度变化的位置。

7. 发明授权

US08842963B2 Reducing reflection at termination of optical fiber in a small volume 有权
标题翻译：减少光纤终端反射，体积小
公开(公告)号：US08842963B2
公开(公告)日：2014-09-23
申请号：US13222577
申请日：2011-08-31
申请人： Paul F. Wysocki , Alan Heaney , Stephen Kreger , Mark Froggatt , Ken Walker
发明人： Paul F. Wysocki , Alan Heaney , Stephen Kreger , Mark Froggatt , Ken Walker
IPC分类号： G02B6/00
CPC分类号： G02B6/243
摘要： A method and structure for terminating an optical fiber are disclosed that provide an optical fiber termination structure with a small volume and very low return loss, even when the termination is in close proximity to reflective surfaces. In one example embodiment, the optical fiber termination reduces reflections into the one or more cores to a return loss of −70 dB or less regardless of the presence of surfaces proximate the optical fiber termination. At the same time, a length of the optical fiber termination is less than 5 mm and a largest transverse dimension of the optical fiber termination is less than 325 um. The optical fiber termination is useful in fiber sensing applications in general and is particularly effective for terminating a multi-core fiber used in a distributed shape sensing application.
摘要翻译：公开了用于端接光纤的方法和结构，其提供具有小体积和非常低的回波损耗的光纤终端结构，即使当终端紧靠反射表面时。在一个示例实施例中，光纤终端将反射到一个或多个核心中，使得接近光纤终端的表面的存在而减小到-70dB或更小的回波损耗。同时，光纤终端的长度小于5mm，光纤终端的最大横向尺寸小于325μm。光纤终端通常在光纤传感应用中是有用的，并且对于终止分布形状感测应用中使用的多芯光纤是特别有效的。

8. 发明申请

US20120057841A1 Registration of an extended reference for parameter measurement in an optical sensing system 有权
标题翻译：在光学传感系统中注册参数测量的扩展参考
公开(公告)号：US20120057841A1
公开(公告)日：2012-03-08
申请号：US13222577
申请日：2011-08-31
申请人： Paul F. Wysocki , Alan Heaney , Stephen Kreger , Mark Froggatt , Kenneth Walker
发明人： Paul F. Wysocki , Alan Heaney , Stephen Kreger , Mark Froggatt , Kenneth Walker
IPC分类号： G02B6/00 , C03B37/01
CPC分类号： G02B6/243
摘要： A method and structure for terminating an optical fiber are disclosed that provide an optical fiber termination structure with a small volume and very low return loss, even when the termination is in close proximity to reflective surfaces. In one example embodiment, the optical fiber termination reduces reflections into the one or more cores to a return loss of −70 dB or less regardless of the presence of surfaces proximate the optical fiber termination. At the same time, a length of the optical fiber termination is less than 5 mm and a largest transverse dimension of the optical fiber termination is less than 325 um. The optical fiber termination is useful in fiber sensing applications in general and is particularly effective for terminating a multi-core fiber used in a distributed shape sensing application.
摘要翻译：公开了用于端接光纤的方法和结构，其提供具有小体积和非常低的回波损耗的光纤终端结构，即使当终端紧靠反射表面时。在一个示例实施例中，光纤终端将反射到一个或多个核心中，使得接近光纤终端的表面的存在而减小到-70dB或更小的回波损耗。同时，光纤终端的长度小于5mm，光纤终端的最大横向尺寸小于325μm。光纤终端通常在光纤传感应用中是有用的，并且对于终止分布形状感测应用中使用的多芯光纤是特别有效的。

9. 发明授权

US07633607B2 Method and apparatus for calibrating measurement equipment 有权
标题翻译：用于校准测量设备的方法和设备
公开(公告)号：US07633607B2
公开(公告)日：2009-12-15
申请号：US10570257
申请日：2004-09-01
申请人： Mark Froggatt
发明人： Mark Froggatt
IPC分类号： G01N21/00
CPC分类号： G01N21/274 , G01N21/21
摘要： Measurement equipment may be calibrated using two different calibration paths. An initial calibration is performed using a calibration path in which an optical element may be coupled for testing after the initial calibration. Once the initial calibration has been performed and the optical element operatively-connected in the main path for testing, one or more re-calibrations occur using another calibration path. The optical element being tested need not be de-coupled during the re-calibration. Each calibration operation produces error correction matrices which are used to correct the measurement matrix generated by the test equipment for the optical element being tested.
摘要翻译：可以使用两个不同的校准路径校准测量设备。使用其中可以耦合光学元件以在初始校准之后进行测试的校准路径来执行初始校准。一旦执行了初始校准，并且光学元件在主路径中可操作地连接用于测试，则使用另一个校准路径进行一次或多次重新校准。被测试的光学元件在重新校准期间不需要去耦合。每个校准操作产生误差校正矩阵，其用于校正由被测试的光学元件的测试设备产生的测量矩阵。

10. 发明申请

US20070171399A1 Method and apparatus for calibrating measurement equipment 有权
标题翻译：用于校准测量设备的方法和设备
公开(公告)号：US20070171399A1
公开(公告)日：2007-07-26
申请号：US10570257
申请日：2004-09-01
申请人： Mark Froggatt
发明人： Mark Froggatt
IPC分类号： G01N21/00
CPC分类号： G01N21/274 , G01N21/21
摘要： Measurement equipment may be calibrated using two different calibration paths. An initial calibration is performed using a calibration path in which an optical element may be coupled for testing after the initial calibration. Once the initial calibration has been performed and the optical element operatively-connected in the main path for testing, one or more re-calibrations occur using another calibration path. The optical element being tested need not be de-coupled during the re-calibration. Each calibration operation produces error correction matrices which are used to correct the measurement matrix generated by the test equipment for the optical element being tested.
摘要翻译：可以使用两个不同的校准路径校准测量设备。使用其中可以耦合光学元件以在初始校准之后进行测试的校准路径来执行初始校准。一旦执行了初始校准，并且光学元件在主路径中可操作地连接用于测试，则使用另一个校准路径进行一次或多次重新校准。被测试的光学元件在重新校准期间不需要去耦合。每个校准操作产生误差校正矩阵，其用于校正由被测试的光学元件的测试设备产生的测量矩阵。

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