公开(公告)号：US09831948B2

公开(公告)日：2017-11-28

申请号：US15263986

申请日：2016-09-13

Applicant: EXFO INC.

Inventor： Bernard Ruchet ,  Mario L'Heureux ,  Daniel Gariepy

IPC: H04B17/00 ,  H04B10/079 ,  H04B10/27 ,  H04J14/02

CPC classification number: H04B10/07955 ,  H04B10/079 ,  H04B10/27 ,  H04J14/0221

Abstract: A passive optical network (PON) device and method for optical power measurement along an optical transmission path supporting bidirectional propagation of downstream light and upstream light between two network elements of a PON is provided. The device includes an optical power splitter assembly extracting respective portions of the upstream and downstream light, and an upstream wavelength analyzer determining, from the extracted upstream light, an upstream spectral characteristic of the upstream light. The device also includes a processing unit determining, based on the upstream spectral characteristic, a downstream spectral characteristic of a downstream signal of interest among a plurality of downstream signals of the downstream light, and a downstream filter assembly filtering the extracted downstream light to select a portion of the downstream signal of interest. The device further includes a downstream optical power meter assembly measuring an optical power parameter of the selected portion of the downstream signal of interest.

公开(公告)号：USD796522S1

公开(公告)日：2017-09-05

申请号：US29526554

申请日：2015-05-11

Applicant: EXFO INC.

Designer： Mario L'Heureux ,  Félix Gaudreault ,  Benoît Fellice ,  Jean-François Drolet ,  Laurence Choquet

公开(公告)号：US11821808B2

公开(公告)日：2023-11-21

申请号：US16944853

申请日：2020-07-31

Applicant: EXFO Inc.

Inventor： Olivier Cote ,  Nicolas Caron ,  Mario L'Heureux ,  Robert Baribault

IPC: G06T7/62 ,  G01M11/00 ,  G06T7/00

CPC classification number: G01M11/3145 ,  G01M11/3136 ,  G06T7/0004 ,  G06T7/62 ,  G06T2207/10056 ,  G06T2207/30108

Abstract: 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.

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.

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.

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

IPC: G01N21/00 ,  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 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。

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。