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公开(公告)号：US20250076152A1
公开(公告)日：2025-03-06
申请号：US18808379
申请日：2024-08-19
Applicant: EXFO Inc.
Inventor： Stephane PERRON
IPC: G01M11/00
Abstract: Described herein are systems and methods for testing connectivity of strands of a fiber optic cable, the ends of which terminate at a first site and a second site. A method, according to one implementation, includes the step of coordinating the first and second sites to generate a signal at a first end of the strands and to detect presence of the signal at a second end of the strands. The method also includes receiving confirmation information from the first and second sites pertaining to the signal being generated and detected. Also, the method includes the steps of utilizing the confirmation information to match the first end of the strands with the second end of the strands for determining fiber strand connectivity between the first site and the second site and then creating a connectivity map showing the fiber strand connectivity.
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公开(公告)号：US20210135752A1
公开(公告)日：2021-05-06
申请号：US17088157
申请日：2020-11-03
Applicant: EXFO Inc.
Inventor： Mario L'HEUREUX , Stephane PERRON
IPC: H04B10/071 , G01M11/00 , H04B10/035 , G01D5/353 , H05B45/20 , H05B45/22
Abstract: There is provided an OTDR receive device and an OTDR system comprising an OTDR receive device 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.
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公开(公告)号：US20220128434A1
公开(公告)日：2022-04-28
申请号：US17451397
申请日：2021-10-19
Applicant: EXFO Inc.
Inventor： Stephane PERRON , Michel LECLERC , Pascal GOSSELIN-BADAROUDINE
IPC: G01M11/00
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.
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公开(公告)号：US20190170610A1
公开(公告)日：2019-06-06
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
CPC classification number: G01M11/33 , G02B6/385 , G02B6/3885 , H04B10/0731
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.
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公开(公告)号：US20210404909A1
公开(公告)日：2021-12-30
申请号：US17360357
申请日：2021-06-28
Applicant: EXFO Inc.
Inventor： Michel LECLERC , Pascal GOSSELIN-BADAROUDINE , Stephane PERRON
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：US20210278313A1
公开(公告)日：2021-09-09
申请号：US17303355
申请日：2021-05-27
Applicant: EXFO Inc.
Inventor： Michael SIMARD , Kristine PALANJYAN , Stephane PERRON
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.
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公开(公告)号：US20210199536A1
公开(公告)日：2021-07-01
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.
