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81. 发明授权

US09858137B2 Network test system 有权
公开(公告)号：US09858137B2
公开(公告)日：2018-01-02
申请号：US14558773
申请日：2014-12-03
申请人： EXFO INC.
发明人： Dominic Lapierre , Bruno Giguere , Sylvain Nadeau , Gilles Buteau
IPC分类号： G06F11/00 , G06F11/07 , G06F11/22
CPC分类号： G06F11/079 , G06F11/2294 , H04L43/50
摘要： A test system and a related method, the system comprising a test processing agent and local test device(s). The test processing agent processes test measurements related to a network-under-test into test results. The test processing agent is decoupled from the network-under-test, e.g., by being reachable through a network communication link distinct from the network-under-test. The local test device comprises a firmware module and a network interface (NI) module. The firmware module depends on external instructions for initiating a test sequence on the network-under-test. The NI module comprises at least one physical port connectable to the network-under-test. The physical port is used for initiating the test sequence. The test processing agent receives the test measurements following the initiation of the test sequence by the local test device and allows access to the test results.

82. 发明授权

US09749043B2 Method for referencing an optical power loss measurement system, and associated computer readable memory and OPLM system 有权
公开(公告)号：US09749043B2
公开(公告)日：2017-08-29
申请号：US14941759
申请日：2015-11-16
申请人： EXFO INC.
发明人： Stephane Perron
IPC分类号： H04B10/079 , G01M11/00
CPC分类号： H04B10/07955 , G01M11/33
摘要： The computer readable memory has recorded thereon instruction code for execution by a computing device for use with an optical power loss measurement (OPLM) system. The instruction code generally comprises: code for displaying a first set of instructions including measuring a first power value of test light outputted from a first reference optical waveguide; code for displaying a second set of instructions including measuring a second power value of test light outputted from a reference waveguide link including the first reference optical waveguide connected in series to a second reference optical waveguide; code for displaying a third set of instructions including measuring a reference power value of the OPLM system resulting from the propagation of light from via the reference waveguide link; and code for determining a corrected reference power value based on the reference power value and on the first and second power values.

83. 发明授权

US09596027B2 Signal deformation measurement on polarization-multiplexed signals 有权
标题翻译：偏振复用信号的信号变形测量
公开(公告)号：US09596027B2
公开(公告)日：2017-03-14
申请号：US14268144
申请日：2014-05-02
申请人： EXFO Inc.
发明人： Gang He , Daniel Gariepy , Mats Skold
IPC分类号： H04B10/079 , H04J14/06
CPC分类号： H04B10/07953 , H04J14/06
摘要： There is provided a method and an apparatus for determining quality parameters on a polarization-multiplexed optical signal based on an analysis of the power spectral density of the Signal-Under-Test (SUT). The method is predicated upon knowledge of the spectral shape of the signal in the absence of significant noise or spectral deformation. This knowledge is provided by a reference optical spectrum trace. Based on this knowledge and under the assumption that ASE noise level is approximately constant in wavelength over a given spectral range, the spectral deformation of the signal contribution of the SUT may be estimated using a comparison of the spectral variations of the optical spectrum trace of the SUT with that of the reference optical spectrum trace.
摘要翻译：提供了一种基于对测试信号（SUT）的功率谱密度的分析来确定偏振复用光信号质量参数的方法和装置。该方法基于在没有显着噪声或光谱变形的情况下对信号的光谱形状的了解。该知识由参考光谱轨迹提供。基于这一知识，并假设ASE噪声水平在给定光谱范围内的波长近似恒定，则SUT的信号贡献的光谱变形可以使用光谱轨迹的光谱变化的比较来估计 SUT与参考光谱图谱相同。

84. 发明授权

US09506838B2 Bi-directional multi-pulsewidth optical time-domain reflectometer 有权
标题翻译：双向多脉冲宽度光时域反射计
公开(公告)号：US09506838B2
公开(公告)日：2016-11-29
申请号：US14820707
申请日：2015-08-07
申请人： EXFO INC.
发明人： Mario L'Heureux , Michel Leclerc , Eric Thomassin , Stephane Perron
IPC分类号： G01N21/00 , G01M11/00
CPC分类号： G01M11/3145 , G01M11/3109 , G01M11/3118 , G01M11/39
摘要： There is provided a bi-directional optical reflectometric method for characterizing an optical fiber link. The method comprises: performing at least one forward-direction light acquisition from one end of the optical fiber link and performing at least one backward-direction light acquisition from the opposite end, wherein each light acquisition is performed by propagating at least one test light signal corresponding to given spatial resolution and detecting corresponding return light so as to obtain a reflectometric trace representing backscattered and reflected light as a function of a distance on the optical fiber link, and wherein said forward-direction light acquisition and said backward-direction light acquisition are performed with mutually different spatial resolutions; and deriving a value of at least one parameter characterizing an event at a location along said optical fiber link at least using the forward-direction light acquisition and the backward-direction light acquisition performed with mutually different spatial resolutions.
摘要翻译：提供了用于表征光纤链路的双向光学反射测量方法。该方法包括：从光纤链路的一端执行至少一个正向光采集，并从相对端执行至少一个反向光采集，其中每个光采集通过传播至少一个测试光信号对应于给定的空间分辨率并检测相应的返回光，以获得表示作为光纤链路上的距离的函数的反向散射和反射光的反射光线，其中所述前向光获取和所述反向光获取是以相互不同的空间分辨率进行; 以及至少使用以相互不同的空间分辨率执行的前向光采集和反向光采集，沿着所述光纤链路的位置导出表征事件的至少一个参数的值。

85. 发明授权

US09423316B2 Optical reflectometer with loss and/or reflectance profile view 有权
标题翻译：具有损耗和/或反射率分布图的光学反射计
公开(公告)号：US09423316B2
公开(公告)日：2016-08-23
申请号：US14092227
申请日：2013-11-27
申请人： EXFO Inc.
发明人： Stephane Perron , Michel Leclerc
IPC分类号： G01N21/00 , G01M11/00
CPC分类号： G01M11/3145 , G01M11/3118
摘要： There is provided an optical reflectometric method and system for characterizing an optical fiber link, wherein events in the fiber optic link under test are identified and values of parameters characterizing the events (e.g. location, insertion loss and reflectance) are extracted from an analysis of one or more reflectometric measurements performed on the optical fiber link. A loss profile and/or a reflectance profile are then constructed. The loss and reflectance profiles are typically displayed on screen or otherwise graphically represented for an operator to be able to appreciate the measurement results at a single glance.
摘要翻译：提供了用于表征光纤链路的光学反射测量方法和系统，其中识别被测光纤链路中的事件，并且从一个分析中提取表征事件（例如位置，插入损耗和反射率）的参数值或更多的反射测量在光纤链路上执行。然后构造损耗曲线和/或反射率分布。损耗和反射率分布通常显示在屏幕上，或以其它方式表示为操作者，以便能够一目了然地了解测量结果。

86. 发明授权

US09170173B2 Multiple-acquisition otdr method and device 有权
标题翻译：多采集otdr方法和设备
公开(公告)号：US09170173B2
公开(公告)日：2015-10-27
申请号：US14044768
申请日：2013-10-02
申请人： EXFO INC.
发明人： Stéphane Perron , Michel Leblanc
IPC分类号： G01N21/00 , G01M11/00 , H04B10/071
CPC分类号： H04B10/071 , G01M11/3127 , G01M11/3136 , G01M11/3145
摘要： An OTDR device and method for characterizing one or more events in an optical fiber link are provided. A plurality of light acquisitions is performed. For each light acquisition, test light pulses are propagated in the optical fiber link and the corresponding return light signals from the optical fiber link are detected. The light acquisitions are performed under different acquisition conditions, for example using different pulsewidths or wavelengths. Parameters characterizing the event are derived using the detected return signal from at least two of the plurality of light acquisitions.
摘要翻译：提供了用于表征光纤链路中的一个或多个事件的OTDR设备和方法。进行多次光采集。对于每个光采集，测试光脉冲在光纤链路中传播，并且检测来自光纤链路的相应返回光信号。光采集在不同的采集条件下进行，例如使用不同的脉冲宽度或波长。使用来自多个光采集中的至少两个的检测到的返回信号导出表征事件的参数。

87. 外观设计

USD739429S1 Display screen or portion thereof with graphical user interface 有权
公开(公告)号：USD739429S1
公开(公告)日：2015-09-22
申请号：US29455936
申请日：2013-05-28
申请人： EXFO INC.
设计人： Steve Veilleux , Jean-Francois Drolet , Stephane Houde , François Morissette , Francis Audet , Pascal Bouchard

88. 发明授权

US09112604B2 Reference-based in-band OSNR measurement on polarization-multiplexed signals 有权
标题翻译：偏振复用信号的基于参考的带内OSNR测量
公开(公告)号：US09112604B2
公开(公告)日：2015-08-18
申请号：US13501708
申请日：2011-02-14
申请人： Daniel Gariepy , Gang He
发明人： Daniel Gariepy , Gang He
IPC分类号： H04B17/00 , H04B10/079
CPC分类号： H04B10/07953
摘要： There is provided a method for determining an in-band noise parameter, such as the Optical Signal-to-Noise Ratio (OSNR), on an optical signal-under-test (SUT) propagating along an optical communication link and comprising a data-carrying signal contribution of any arbitrary degree of polarization and a noise contribution. A spectral shape trace of data-carrying signal contribution in the SUT is estimated using a reference optical spectrum trace of a reference signal which comprises a data-carrying signal contribution that is spectrally representative of the data-carrying signal contribution of the SUT and a noise contribution which is at least approximately known. The data-carrying signal contribution is mathematically discriminated from said noise contribution in the SUT using the spectral shape trace and the test optical spectrum trace. The in-band noise parameter is then determined at least from the mathematically discriminated noise contribution.
摘要翻译：提供了一种用于在沿着光通信链路传播的光信号在测试（SUT）上确定带内噪声参数（诸如光信噪比（OSNR））的方法，并且包括数据 - 携带任何任意极化度和噪声贡献的信号贡献。使用参考信号的参考光谱轨迹来估计SUT中的数据携带信号贡献的谱形轨迹，该参考信号包括频谱上表示SUT的数据携带信号贡献的数据携带信号贡献，以及噪声贡献至少大致已知。使用光谱形状轨迹和测试光谱轨迹，数据载入信号贡献在数学上与SUT中的噪声贡献区分开。至少从数学识别的噪声贡献中确定带内噪声参数。

89. 发明授权

US09106334B2 Method and system for common-mode-rejection-ratio (CMRR) characterization of an integrated coherent receiver 有权
标题翻译：用于集成相干接收机的共模抑制比（CMRR）表征的方法和系统
公开(公告)号：US09106334B2
公开(公告)日：2015-08-11
申请号：US14273652
申请日：2014-05-09
申请人： EXFO Inc.
发明人： Mathias Westlund , Henrik Sunnerud
IPC分类号： H04B10/073 , H04B10/61
CPC分类号： H04B10/0731 , H04B10/614
摘要： There are provided a method and a system for characterizing the CMRR of an ICR under test, which employ highly coherent light from two continuous-wave (CW) single-frequency lasers whose respective optical frequencies mutually differ by an offset defining an “Intermediate Frequency” (fIF) in the rf electrical baseband. The method involves the coherent mixing of light from these two lasers in the ICR under test. A “tone” in the rf electrical baseband at frequency fIF is generated by the beating of light from the two single-frequency lasers as they interfere on the photodetectors of the ICR. The resulting tone at frequency fIF in the output electrical signals of the ICR is then detected and analyzed to characterize the CMRR of the ICR.
摘要翻译：提供了一种用于表征正在测试的ICR的CMRR的方法和系统，其使用来自两个连续波（CW）单频激光器的高度相干的光，其相应的光频率相互限定“中间频率” （fIF）在rf电基带。该方法涉及在被测试的ICR中来自这两个激光器的光的相干混合。频率为fIF的RF电基带中的“音调”通过来自两个单频激光器的光的抖动产生，因为它们干扰ICR的光电检测器。然后检测和分析ICR的输出电信号中频率fIF产生的音调，以表征ICR的CMRR。

90. 发明申请

US20140341564A1 METHOD AND SYSTEM FOR COMMON-MODE-REJECTION-RATIO (CMRR) CHARACTERIZATION OF AN INTEGRATED COHERENT RECEIVER 有权
标题翻译：集成相干接收机的共模抑制比（CMRR）特征的方法和系统
公开(公告)号：US20140341564A1
公开(公告)日：2014-11-20
申请号：US14273652
申请日：2014-05-09
申请人： EXFO Inc.
发明人： Mathias WESTLUND , Henrik SUNNERUD
IPC分类号： H04B10/073 , H04B10/64 , H04B10/61
CPC分类号： H04B10/0731 , H04B10/614
摘要： There are provided a method and a system for characterizing the CMRR of an ICR under test, which employ highly coherent light from two continuous-wave (CW) single-frequency lasers whose respective optical frequencies mutually differ by an offset defining an “Intermediate Frequency” (fIF) in the rf electrical baseband. The method involves the coherent mixing of light from these two lasers in the ICR under test. A “tone” in the rf electrical baseband at frequency fIF is generated by the beating of light from the two single-frequency lasers as they interfere on the photodetectors of the ICR. The resulting tone at frequency fIF in the output electrical signals of the ICR is then detected and analyzed to characterize the CMRR of the ICR.
摘要翻译：提供了一种用于表征正在测试的ICR的CMRR的方法和系统，其使用来自两个连续波（CW）单频激光器的高度相干的光，其相应的光频率相互限定“中间频率” （fIF）在rf电基带。该方法涉及在被测试的ICR中来自这两个激光器的光的相干混合。频率为fIF的RF电基带中的“音调”通过来自两个单频激光器的光的抖动产生，因为它们干扰ICR的光电检测器。然后检测和分析ICR的输出电信号中频率fIF产生的音调，以表征ICR的CMRR。

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