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61. 外观设计

USD935921S1 Portable test instrument 有权
公开(公告)号：USD935921S1
公开(公告)日：2021-11-16
申请号：US29704554
申请日：2019-09-05
申请人： EXFO Inc.
设计人： Patrice Gonay

62. 发明授权

US11121785B2 Detection and tracking of interferers in a RF spectrum with multi-lane processing 有权
公开(公告)号：US11121785B2
公开(公告)日：2021-09-14
申请号：US16738258
申请日：2020-01-09
申请人： EXFO Inc.
发明人： Martin Levesque
IPC分类号： H04B17/345 , H04W24/08
摘要： An interference detection method and system and for providing information about at least one interference in I/Q data obtained over-the-air or detected on a link between a radio equipment controller (REC) and at least one radio equipment (RE). The method includes noise filtering a set of the FFTs into an averaged FFT, filtering the averaged FFT with a high-pass filter to remove low frequency components, applying a power threshold on the high-pass filtered FFT to select at least one candidate peak having a power greater than the power threshold; outputting information about the at least one candidate peak, which is a potential interference. The interference detection method further includes multi-lane processing and power shift compensation.

63. 外观设计

USD923028S1 Display screen or portion thereof with graphical user interface 有权
公开(公告)号：USD923028S1
公开(公告)日：2021-06-22
申请号：US29664955
申请日：2018-09-28
申请人： EXFO INC.
设计人： Stephane Perron , Antoine-Alexandre Michaud

64. 发明申请

US20210072077A1 OFFSET NULLING FOR OPTICAL POWER METERS 有权
公开(公告)号：US20210072077A1
公开(公告)日：2021-03-11
申请号：US17002970
申请日：2020-08-26
申请人： EXFO Inc.
发明人： Nelu RADU
IPC分类号： G01J1/44
摘要： There is provided an optical power measurement method, an offset calibration method and an optical power meter that is adapted to apply the offset calibration method. The optical power measurement method, the offset calibration method and the optical power meter are characterized in that two temperature sensors are used for more accurate predictions of the optical power offset. A first temperature sensor is positioned to read a temperature of the photodiode and a second temperature sensor is positioned to read a temperature of the PCB ground plane.

65. 发明申请

US20210063274A1 SIGNATURE RECOGNITION ON OPTICAL-FIBER CONNECTOR ENDFACES 有权
公开(公告)号：US20210063274A1
公开(公告)日：2021-03-04
申请号：US16944853
申请日：2020-07-31
申请人： EXFO Inc.
发明人： Olivier COTE , Nicolas CARON , Mario L'HEUREUX , Robert BARIBAULT
IPC分类号： G01M11/00 , G06T7/00 , G06T7/62
摘要： There is therefore provided a method, system and computer program for detecting duplicate optical-fiber connector endface inspections performed on a same optical-fiber connector. Duplicate optical-fiber connector endface inspections can be detected by extracting a signature of the optical-fiber connector endface from the acquired optical-fiber connector endface inspection image to uniquely identify the optical-fiber connector and detect duplicate optical-fiber connector endface inspections. The signature can be stored to help detection of inadvertent or fraudulent duplicate or repetitive measurements made on a same optical-fiber connector.

66. 发明授权

US10862582B1 OTDR receive device with connectivity feedback 有权
公开(公告)号：US10862582B1
公开(公告)日：2020-12-08
申请号：US16510396
申请日：2019-07-12
申请人： EXFO Inc.
发明人： Mario L'Heureux , Stephane Perron
IPC分类号： H04B10/035 , H05B45/20 , H04B10/071 , G01M11/00 , G01D5/353 , H05B45/22
摘要： There is provided an OTDR receive device, an OTDR system comprising an OTDR receive device and an OTDR method wherein the OTDR unit and the OTDR receive device are to be connected at opposite ends of an optical fiber link under test. The OTDR receive device comprises means for the OTDR system to detect an established connectivity between the OTDR unit and the OTDR receive device via the optical fiber link under test and a status indicator to notify a user of the receive device of the connectivity status and optionally an OTDR measurement status. Connectivity detection allows to check for continuity between the OTDR unit and the OTDR receive device before launching an OTDR measurement. A user of the OTDR unit does not need to communicate with the user of the OTDR receive device to know when to start the acquisition.

67. 发明授权

US10574378B2 Optical power measurement in a passive optical network 有权
公开(公告)号：US10574378B2
公开(公告)日：2020-02-25
申请号：US16388367
申请日：2019-04-18
申请人： EXFO Inc.
发明人： Bernard Ruchet , Mario L'Heureux , Daniel Gariepy , Etienne Morin-Drouin
IPC分类号： H04B10/079 , H04J14/02
摘要： A device and method for optical power measurement in an optical network supporting upstream and downstream signal propagation along an optical transmission path. An upstream wavelength analyzer receives upstream light extracted from the optical transmission path and is configured to determine an upstream spectral characteristic of the extracted upstream light. A downstream optical power meter assembly receives downstream light extracted from the optical transmission path and is configured to measure an optical power parameter of a downstream signal. A processing unit is configured to determine, based on the upstream spectral characteristic, at least one pass/fail threshold associated with the measured optical power parameter of the downstream signal.

68. 发明授权

US09900087B2 Multimode launch systems for use in performing an OTDR measurement on a multi-fiber array DUT and method of performing same 有权
公开(公告)号：US09900087B2
公开(公告)日：2018-02-20
申请号：US15263036
申请日：2016-09-12
申请人： EXFO INC.
发明人： Bernard Ruchet
IPC分类号： H04B10/071 , H04B10/2581 , G01M11/00 , G02B6/14
CPC分类号： H04B10/071 , G01M11/3136 , G01M11/3154 , G02B6/14 , H04B10/2581
摘要： A multimode launch system to be connected to an Optical Time-Domain Reflectometer (OTDR) for use in performing at least one OTDR measurement on a multi-fiber array Device Under Test (DUT), the multimode launch system comprising: an optical switch being connectable to the OTDR during use; a launch array device having an end being connectable to the optical switch and another end being connectable to the multi-fiber array DUT during use, the launch array device having a plurality of multimode launch optical fibers each having at least one first guidance parameter being smaller than a corresponding one of at least one second guidance parameter of at least one multimode optical fiber of the optical switch; and a multi-fiber mode conditioner along the launch array device for inducing a preferential attenuation of higher-order optical modes of test light propagated into the multi-fiber array DUT during use.

69. 发明授权

US09673899B2 In-band OSNR measurement on polarization-multiplexed signals 有权
公开(公告)号：US09673899B2
公开(公告)日：2017-06-06
申请号：US14223165
申请日：2014-03-24
申请人： EXFO INC.
发明人： Henrik Sunnerud , Mats Skold , Mathias Westlund
IPC分类号： H04J14/06 , H04B10/079
CPC分类号： H04B10/07953 , H04J14/06
摘要： There is provided a system and a method for determining an in-band noise parameter representative of the optical noise contribution (such as OSNR) on a polarization-multiplexed optical Signal-Under-Test (SUT) comprising two polarized phase-modulated data-carrying contributions and an optical noise contribution. For each of a multiplicity of distinct polarization-analyzer conditions, the SUT is analyzed to provide at least one polarization-analyzed component of the SUT and the polarization-analyzed component is detected with an electronic bandwidth at least ten times smaller than the symbol rate of the SUT to obtain a corresponding acquired electrical signal; for each acquired electrical signal, a value of a statistical parameter is determined from the ac component of the acquired electrical signal, thereby providing a set of statistical-parameter values corresponding to the multiplicity of distinct polarization-analyzer conditions; and, from the set of statistical-parameter values, the in-band noise parameter is mathematically determined.

70. 发明申请

US20150110486A1 IN-BAND OSNR MEASUREMENT ON POLARIZATION-MULTIPLEXED SIGNALS 有权
标题翻译：极化多重信号的带内OSNR测量
公开(公告)号：US20150110486A1
公开(公告)日：2015-04-23
申请号：US14223165
申请日：2014-03-24
申请人： EXFO INC.
发明人： Henrik Sunnerud , Mats Skold , Mathias Westlund
IPC分类号： H04B10/079 , H04J14/06
CPC分类号： H04B10/07953 , H04J14/06
摘要： There is provided a system and a method for determining an in-band noise parameter representative of the optical noise contribution (such as OSNR) on a polarization-multiplexed optical Signal-Under-Test (SUT) comprising two polarized phase-modulated data-carrying contributions and an optical noise contribution. For each of a multiplicity of distinct polarization-analyzer conditions, the SUT is analyzed to provide at least one polarization-analyzed component of the SUT and the polarization-analyzed component is detected with an electronic bandwidth at least ten times smaller than the symbol rate of the SUT to obtain a corresponding acquired electrical signal; for each acquired electrical signal, a value of a statistical parameter is determined from the ac component of the acquired electrical signal, thereby providing a set of statistical-parameter values corresponding to the multiplicity of distinct polarization-analyzer conditions; and, from the set of statistical-parameter values, the in-band noise parameter is mathematically determined.
摘要翻译：提供了一种系统和方法，用于在偏振复用光信号不足测试（SUT）上确定表示光噪声贡献（例如OSNR）的带内噪声参数的系统和方法，该信号包括两个偏振相位调制数据携带贡献和光学噪声贡献。对于多个不同的偏振分析器条件中的每一个，分析SUT以提供至少一个SUT的偏振分析分量，并且以电子带宽检测偏振分析的分量，比电子带宽小至少比符号率 SUT获得相应的获取的电信号; 对于每个获取的电信号，从所获取的电信号的ac分量确定统计参数的值，从而提供与多个不同偏振分析器条件对应的一组统计参数值; 并且从该组统计参数值中，数学地确定带内噪声参数。

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