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    ADAPTER TIP AND MICROSCOPE SYSTEM FOR INSPECTING ANGLED-POLISHED OPTICAL-FIBER CONNECTORS
    71.
    发明申请
    ADAPTER TIP AND MICROSCOPE SYSTEM FOR INSPECTING ANGLED-POLISHED OPTICAL-FIBER CONNECTORS 有权

    公开(公告)号：US20250076625A1

    公开(公告)日：2025-03-06

    申请号：US18808583

    申请日：2024-08-19

    Applicant: EXFO Inc.

    Inventor： Olivier COTE ,  Charles GAUVIN

    IPC: G02B21/00 ,  G02B6/38

    Abstract: There is provided an adapter tip to be employed with an optical-fiber connector-endface inspection microscope device and an optical-fiber connector endface inspection microscope system suitable for imaging angled-polished optical-fiber endface(s) of an optical-fiber connector. The proposed adapter tip or microscope system comprises relay optics comprising a multifaceted optical prism defining a first reflecting plane surface, a second reflecting plane surface and a third reflecting plane surface, used to deflect inspection light coming from the endface(s) through reflection of illumination light—referred to hereinafter as the object beam—towards and substantially in line with the optical axis of the objective lens of the optical-fiber connector-endface inspection microscope device.

    OPTICAL TEST DEVICE AND CONNECTOR ADAPTER
    72.
    发明申请
    OPTICAL TEST DEVICE AND CONNECTOR ADAPTER 有权

    公开(公告)号：US20240410784A1

    公开(公告)日：2024-12-12

    申请号：US18661018

    申请日：2024-05-10

    Applicant: EXFO INC.

    Inventor： Alexandre DRAPEAU ,  Michel LECLERC

    IPC: G01M11/00

    Abstract: An optical test device, in combination with a removable connector adapter, is provided. A method of testing an optical fiber is also provided. The test device comprises a test port configured to interface with optical-fiber cables having a given number of optical fibers. The connector adapter comprises a device connector adapted to connect to test port; and a fiber-under-test (FUT) connector adapted connect to an optical-fiber cable, such as a test cord connectable to the FUT. The FUT connector is configured to interface with optical-fiber cables having a number of fibers that is different from the number of fibers of the test port. The optical test device comprises a processing unit configurable to adjust the tests to be conducted based on the connector adapter detected, and to adapt the user interfaces and test parameters accordingly.

    METHOD AND APPARATUS OF DISTRIBUTED ACOUSTIC SENSING
    74.
    发明公开
    METHOD AND APPARATUS OF DISTRIBUTED ACOUSTIC SENSING 审中-公开

    公开(公告)号：US20240344878A1

    公开(公告)日：2024-10-17

    申请号：US18624663

    申请日：2024-04-02

    Applicant: EXFO Inc.

    Inventor： Hongxin CHEN ,  Michel LEBLANC

    IPC: G01H9/00 ,  G01D5/353

    CPC classification number: G01H9/004 ,  G01D5/35358

    Abstract: There is provided a method and system of frequency dithered distributed acoustic sensing (FD-DAS) using group data signal processing, where the continuous wave (CW) coherent laser's optical frequency or optical phase for the FD-DAS interrogator may be set in evenly or randomly distributed manner for different data groups but they are kept as constant or with negligibly variation within each data group. Such FD-DAS may be used to improve acoustic or vibration signal measurement reliability, to allow to use a low-cost single-frequency laser such as a DFB laser, and/or to suppress polarization fading effect.

    Visual fiber finder for sequencing optical fiber testing
    75.
    发明授权
    Visual fiber finder for sequencing optical fiber testing 有权

    公开(公告)号：US11921000B2

    公开(公告)日：2024-03-05

    申请号：US17648866

    申请日：2022-01-25

    Applicant: EXFO Inc.

    Inventor： Michel Leclerc

    IPC: G01M11/00

    CPC classification number: G01M11/33

    Abstract: There is provided optical power loss measurement method and system for that aims to provide a more productive way to perform optical power loss measurements involving test units typically at different locations. Visual fiber finder light can be used to assist the user at the other end of the optical fiber link under test in identifying where to connect the power meter unit. A visual fiber finder light and test light are combined on a same output port of a light source unit at one end of the optical fiber link under test wherein visual fiber finder light is interleaved with test light in a cyclic sequence so that both are not active at the same time. The optical power meter unit determines a time slot when to measure test light in accordance with the given cyclic sequence.

    Early detection of quality control test failures for manufacturing end-to-end testing optimization
    76.
    发明授权
    Early detection of quality control test failures for manufacturing end-to-end testing optimization 有权

    公开(公告)号：US11892507B2

    公开(公告)日：2024-02-06

    申请号：US17891405

    申请日：2022-08-19

    Applicant: EXFO Inc.

    Inventor： Jonathan Plante ,  Justin Whatley ,  Sylvain Nadeau

    IPC: G01R31/28 ,  G01R31/3183 ,  G06N20/00 ,  G06F18/214 ,  G01R31/3185

    CPC classification number: G01R31/31835 ,  G01R31/318572 ,  G06F18/214 ,  G06N20/00

    Abstract: Example embodiments are disclosed of systems and methods for predicting failure probabilities of future product tests of a testing sequence based on outcomes of prior tests. Predictions are made by a machine-learning-based model (MLM) trained with a set of test-result sequence records (TRSRs) including test values and pass/fail indicators (PRIs) of completed tests. Within training epochs over the set, iterations are carried out over each TRSR. Each iteration involves sub-iterations carried out successively over test results of the TRSR. Each sub-iteration involves (i) inputting to the MLM values of a given test and those of tests earlier in the sequence while masking those later in the sequence, (ii) computing probabilities of test failures for the masked tests found later in the sequence than the given test, and (iii) applying the PFIs of test results later in the sequence than the given test as ground-truths to update parameters of the MLM.

    Optical fiber recognition using backscattering pattern
    78.
    发明授权
    Optical fiber recognition using backscattering pattern 有权

    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.

    Test method for characterizing an optical fiber link
    79.
    发明授权
    Test method for characterizing an optical fiber link 有权

    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

    IPC: G01M11/00 ,  G01D5/26 ,  G01B11/02

    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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