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公开(公告)号：US11650128B2
公开(公告)日：2023-05-16
申请号：US17360357
申请日：2021-06-28
Applicant: EXFO Inc.
Inventor： Michel Leclerc , Pascal Gosselin-Badaroudine , Stephane Perron
IPC: G01M11/00 , H04B10/071
CPC classification number: G01M11/3145 , G01M11/3127 , H04B10/071 , G06F2218/16
Abstract: There are provided methods and systems that enable the use of the backscattering pattern produced by an optical fiber in an OTDR trace as a signature (also referred to herein as the “RBS fingerprint”) to recognize an optical fiber. It was found that it may be difficult to obtain repeatable signatures as those are sensitive to the wavelength of the OTDR laser source and the temperature of the fiber. OTDR methods and systems that are adapted to compare the backscattering pattern in a more repeatable manner are therefore provided. Once the repeatability issue is overcome, such signature can be used for identification purposes and enable new applications.
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公开(公告)号：US11480496B2
公开(公告)日：2022-10-25
申请号：US17198686
申请日：2021-03-11
Applicant: EXFO Inc.
Inventor： Stephane Perron , Eric Thomassin
Abstract: There is provided a test method and system for characterizing an optical fiber link. At least one OTDR acquisition or at least one OLTS acquisition is performed on the optical fiber link. From the acquisition, a value of an excess insertion loss and/or an excess optical return loss associated with the optical fiber link under test is derived, i.e. in excess of a nominal value associated with a hypothetical optical fiber link having a length corresponding to the total length of the optical fiber link under test. A rating value (e.g., as a five-star rating) or a binary pass/fail value associated with the optical fiber link under test can then be derived and displayed.
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公开(公告)号：US10288524B2
公开(公告)日：2019-05-14
申请号：US15427474
申请日：2017-02-08
Applicant: EXFO INC.
Inventor： Michel Leclerc , Mario L'Heureux , Stephane Perron
IPC: G01M11/00
Abstract: There is provided a system and a test instrument for identifying or verifying the fiber arrangement and/or the cable type of multi-fiber array cables (such as MPO cables) which employs a light source and a polarity detector at the near end of the multi-fiber array cable under test, and a loopback device at the far end. The polarity detector comprises light presence detectors used to detect which one of the optical fibers of the multi-fiber array cable returns light looped back at the far end and thereby determine the fiber arrangement and/or the cable type of the multi-fiber array cable.
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公开(公告)号：US09749043B2
公开(公告)日：2017-08-29
申请号：US14941759
申请日：2015-11-16
Applicant: EXFO INC.
Inventor： Stephane Perron
IPC: H04B10/079 , G01M11/00
CPC classification number: H04B10/07955 , G01M11/33
Abstract: 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.
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公开(公告)号：US20170234767A1
公开(公告)日：2017-08-17
申请号：US15427474
申请日：2017-02-08
Applicant: EXFO INC.
Inventor： Michel Leclerc , Mario L'Heureux , Stephane Perron
IPC: G01M11/00
CPC classification number: G01M11/3136 , G01M11/3145 , G01M11/3154
Abstract: There is provided a system and a test instrument for identifying or verifying the fiber arrangement and/or the cable type of multi-fiber array cables (such as MPO cables) which employs a light source and a polarity detector at the near end of the multi-fiber array cable under test, and a loopback device at the far end. The polarity detector comprises light presence detectors used to detect which one of the optical fibers of the multi-fiber array cable returns light looped back at the far end and thereby determine the fiber arrangement and/or the cable type of the multi-fiber array cable.
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Patent Agency Ranking
公开(公告)号：US09506838B2
公开(公告)日：2016-11-29
申请号：US14820707
申请日：2015-08-07
Applicant: EXFO INC.
Inventor： Mario L'Heureux , Michel Leclerc , Eric Thomassin , Stephane Perron
CPC classification number: G01M11/3145 , G01M11/3109 , G01M11/3118 , G01M11/39
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US09423316B2
公开(公告)日：2016-08-23
申请号：US14092227
申请日：2013-11-27
Applicant: EXFO Inc.
Inventor： Stephane Perron , Michel Leclerc
CPC classification number: G01M11/3145 , G01M11/3118
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20140198311A1
公开(公告)日：2014-07-17
申请号：US14014606
申请日：2013-08-30
Applicant: EXFO INC.
Inventor： Mario L'Heureux , Michel Leclerc , Eric Thomassin , Stephane Perron
IPC: G01M11/00
CPC classification number: G01M11/3145 , G01M11/3109 , G01M11/3118 , G01M11/39
Abstract: There is provided a bi-directional optical reflectometric method for characterizing an optical fiber link. The method comprises: performing a plurality of forward-direction light acquisitions from one end of the optical fiber link and performing a plurality of backward-direction light acquisitions 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 plurality of forward-direction light acquisitions and said plurality of backward-direction light acquisitions are each performed with mutually different spatial resolutions; and deriving a value of at least one parameter characterizing an event along said optical fiber link at least using a forward-direction light acquisition and a backward-direction light acquisition performed with mutually different spatial resolutions.
Abstract translation: 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多个正向光采集，并从相对端执行多个反向光采集，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，以便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迹，并且其中所述多个正向光采集和所述多个向后光取样， 方向光采集各自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，沿着所述光纤链路导出表征事件的至少一个参数的值。
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公开(公告)号：US11906389B1
公开(公告)日：2024-02-20
申请号：US17660077
申请日：2022-04-21
Applicant: EXFO Inc.
Inventor： Stephane Perron , Michel Leclerc
IPC: G01M11/00 , H04B10/071 , G02B6/255
CPC classification number: G01M11/3109 , H04B10/071 , G02B6/255
Abstract: There is provided a system and a method for assisting a technician in fiber optic cable splices and comprising a pair of test units including an OTDR, an optical switch, a tone generator and a tone detector to automate the splicing process and testing. The test units may be in communication with a wireless portable device used by the splicing technician and controlled therefrom. In one embodiment, the test units are driven by a test orchestrator application (e.g., server-based) to switch fibers, perform continuity tests and/or splice quality tests, triggered by the technician's portable device.
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公开(公告)号：US11340137B2
公开(公告)日：2022-05-24
申请号：US16722901
申请日：2019-12-20
Applicant: EXFO Inc.
Inventor： Michel Leclerc , Mario L'Heureux , Stephane Perron
Abstract: There are provided techniques for characterizing and testing a cable routing connection configuration connection arrangement comprising a plurality of optical fiber links connected between at least a first connection device at a first end and a second multi-fiber connection device at a second end. Test light is injected into one or more of the optical fiber links via corresponding optical fiber ports of the first connection device. At least one image of the second multi-fiber connection device is captured. Test light exiting the optical fiber link(s) through optical fiber port(s) of the second multi-fiber connection device is imaged as light spot(s) in the captured image. Positions on the second multi-fiber connection device that corresponds to the optical fiber port(s) are determined based on a pattern of the light spot(s) in the captured image. In some implementations, the provided techniques allow detection or verification of cable routing connection configurations at multi-fiber distribution panels.
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