公开(公告)号：US11125648B2

公开(公告)日：2021-09-21

申请号：US16892767

申请日：2020-06-04

Applicant: EXFO Inc.

Inventor： Stephane Perron

IPC: G01M11/00 ,  H04B10/071

Abstract: There is provided a method, system and computer program for detecting duplicate OTDR measurements performed on a same fiber. It is determined whether OTDR traces are likely to have been acquired over the same optical fiber link by comparing the backscattering pattern associated with a given fiber span along the OTDR traces, which corresponds to a continuous optical fiber section.

公开(公告)号：US10371596B2

公开(公告)日：2019-08-06

申请号：US14820864

申请日：2015-08-07

Applicant: EXFO INC.

Inventor： Mario L'Heureux ,  Stephane Perron ,  Michel Leclerc

IPC: G01M11/00

Abstract: There is provided a method and a system for identifying or verifying the fiber arrangement and/or the cable type of multi-fiber array cables (such as MPO cables) which employs an OTDR acquisition device at the near end of the MPO cable, a loopback device at the far end and an array of signatures detectable by the OTDR, either at the far or the near end. The loopback device allows performing bidirectional OTDR measurements with a single OTDR acquisition device (without moving it from one end to the other) and the signature array provides fiber arrangement/cable type identification or verification.

公开(公告)号：US20160164601A1

公开(公告)日：2016-06-09

申请号：US14941759

申请日：2015-11-16

Applicant: EXFO INC.

Inventor： Stephane Perron

IPC: H04B10/079

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.

Abstract translation: 计算机可读存储器中记录有用于由光功率损耗测量（OPLM）系统使用的计算设备执行的指令代码。 指令码通常包括：用于显示第一组指令的代码，包括测量从第一参考光波导输出的测试光的第一功率值; 用于显示第二组指令的代码，包括测量从包括与第二参考光波导串联连接的第一参考光波导的参考波导链路输出的测试光的第二功率值; 用于显示第三组指令的代码，包括测量由来自经由参考波导链路的光的传播产生的OPLM系统的参考功率值; 以及用于基于所述参考功率值以及所述第一和第二功率值来确定校正的参考功率值的代码。

公开(公告)号：US11181440B2

公开(公告)日：2021-11-23

申请号：US16589873

申请日：2019-10-01

Applicant: EXFO Inc.

Inventor： Stephane Perron

IPC: G01M11/00 ,  H04B10/071 ,  H04B10/077

Abstract: There is provided an OTDR method and device for characterizing an optical fiber link. At least a first OTDR acquisition is performed toward the optical fiber link. From the at least one first OTDR acquisition, one or more events are identified along the optical fiber link and a value of at least one characteristic associated with each event is estimated. A second OTDR acquisition is performed toward the optical fiber link in order to target a specific event among the identified events. Values of one or more OTDR acquisition parameters for the second OTDR acquisition are determined such that the OTDR acquisition parameters comprise a second pulse width different from the first pulse width used in the first OTDR acquisition.

公开(公告)号：US11022520B2

公开(公告)日：2021-06-01

申请号：US16553964

申请日：2019-08-28

Applicant: EXFO Inc.

Inventor： Michael Simard ,  Kristine Palanjyan ,  Stephane Perron

IPC: G01M11/00 ,  G01M11/08 ,  G02B6/38 ,  G01J1/02 ,  G01J1/04 ,  H04B10/071 ,  H04B10/073 ,  G02B6/42

Abstract: An optical test instrument, in combination with a removable connector cartridge is provided. A method of replacing a damaged or worn optic fiber interface is also provided. The optical test instrument has casing having a cartridge receiving cavity therein with an inner end provided with a test instrument optical port; and an outer end provided with a cartridge receiving opening. The connector cartridge is sized and configured to be inserted in the cartridge receiving cavity. The connector cartridge has a cartridge inner end for facing the test instrument optical port when in use, and a cartridge outer end for receiving an optic fiber from a device under test (DUT). The connector cartridge houses a fiber optic cable extending between the cartridge inner end and the cartridge outer end. The connector cartridge is removably connectable to the instrument casing to allow replacement of the connector cartridge when the cartridge outer end is worn or damaged.

公开(公告)号：US20150346054A1

公开(公告)日：2015-12-03

申请号：US14820707

申请日：2015-08-07

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 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：US09134197B2

公开(公告)日：2015-09-15

申请号：US14014606

申请日：2013-08-30

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 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。

公开(公告)号：US11879802B2

公开(公告)日：2024-01-23

申请号：US17451397

申请日：2021-10-19

Applicant: EXFO Inc.

Inventor： Stephane Perron ,  Michel Leclerc ,  Pascal Gosselin-Badaroudine

IPC: G01M11/00 ,  H04B10/071

CPC classification number: G01M11/3154 ,  G01M11/3136 ,  H04B10/071

Abstract: There are provided methods and systems for testing the continuity of optical fiber links under test and/or a fiber arrangement, polarity or mapping of optical fiber connections within optical devices under test using the backscattering pattern as a signature. The device under test may comprises a single fiber, a duplex link, a multifiber cable or another multi-port device such as a backplane device.

公开(公告)号：US11726002B2

公开(公告)日：2023-08-15

申请号：US17303355

申请日：2021-05-27

Applicant: EXFO Inc.

Inventor： Michael Simard ,  Kristine Palanjyan ,  Stephane Perron

IPC: G01M11/08 ,  G01M11/00 ,  G02B6/38 ,  G01J1/02 ,  G01J1/04 ,  G02B6/42

CPC classification number: G01M11/086 ,  G01J1/0271 ,  G01J1/04 ,  G01M11/3136 ,  G01M11/3154 ,  G02B6/3825 ,  G02B6/3827 ,  G02B6/3893 ,  G02B6/3897 ,  G02B6/421

Abstract: An optical test instrument, in combination with a removable connector cartridge is provided. A method of replacing a damaged or worn optic fiber interface is also provided. The optical test instrument has casing having a cartridge receiving cavity therein with an inner end provided with a test instrument optical port; and an outer end provided with a cartridge receiving opening. The connector cartridge is sized and configured to be inserted in the cartridge receiving cavity. The connector cartridge has a cartridge inner end for facing the test instrument optical port when in use, and a cartridge outer end for receiving an optic fiber from a device under test (DUT). The connector cartridge houses a fiber optic cable extending between the cartridge inner end and the cartridge outer end. The connector cartridge is removably connectable to the instrument casing to allow replacement of the connector cartridge when the cartridge outer end is worn or damaged.

公开(公告)号：US10591385B2

公开(公告)日：2020-03-17

申请号：US15950709

申请日：2018-04-11

Applicant: EXFO Inc.

Inventor： Stephane Perron ,  Daniel Gariepy ,  Nicolas Caron ,  Robert Baribault ,  Vincent Racine

IPC: G01M11/00 ,  G02B6/38 ,  H04B10/073

Abstract: There is provided a method, system and image capture device for determining a polarity of a multi-fiber cable link comprising a plurality of optical fiber links each connected between a first multi-fiber connector and a second multi-fiber connector, according to said polarity. Test light is injected into one or more of the optical fiber links via corresponding injection ports of the first multi-fiber connector, in accordance with a defined injection pattern; at least one polarity-testing image of the second multi-fiber connector is generated in which test light exiting at least one of the optical fiber links through one or more exit ports of the second multi-fiber connector is imaged as one or more spotlight spots in the polarity-testing image; and the polarity of the multi-fiber cable link is determined based on a pattern of said one or more spotlight spots in said polarity-testing image.