公开(公告)号：US11138163B2

公开(公告)日：2021-10-05

申请号：US16669033

申请日：2019-10-30

Applicant: EXFO Inc.

Inventor： Maha Mdini ,  Justin Whatley ,  Sylvain Nadeau

IPC: G06F16/00 ,  G06F16/21 ,  G06F16/22 ,  H04L12/24

Abstract: An embodiment may involve obtaining a set of data records including features characterizing operational aspects of a communication network. Each data record may include a feature vector and performance metrics of the communication network. Each feature vector may include a multiple elements corresponding to feature-value pairs. A first statistical analysis may be applied to the set of data records and their performance metrics to identify major contributors to degraded network performance. A second statistical analysis may be applied to identify elements that negatively influence the major contributors, and to discriminate between additive effects and incompatibilities as the source of negative influence. For each major contributor, a hierarchical dependency tree may be constructed with the major contributor as the root node and influencer elements as other nodes. Redundant dependencies may be removed, mutually dependent influencer elements grouped, and only the longest edges retained, in order to create dependency graph.

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

IPC: G01M11/08 ,  G01M11/00 ,  G02B6/38

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：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

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

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.

公开(公告)号：US10834169B2

公开(公告)日：2020-11-10

申请号：US15255199

申请日：2016-09-02

Applicant: EXFO Inc.

Inventor： David Carruthers

IPC: H04L29/08 ,  G06F11/30 ,  H04W84/12 ,  H04L29/06 ,  H04W4/80

Abstract: System and method for communicating with and controlling a test device. Receiving user input via a system GUI to start a test. In response to the user input, providing by the communication controller a display URL of a resource associated with the test device. Displaying content of the resource nested within the system GUI by a browser. Sending a start instruction to start a test to the test device. Receiving by the communication controller test data from the test device and one of displaying an indication of the test data in the system GUI and storing the test data.

公开(公告)号：US20200252144A1

公开(公告)日：2020-08-06

申请号：US16738258

申请日：2020-01-09

Applicant: EXFO Inc.

Inventor： Martin LEVESQUE

IPC: H04B17/345 ,  H04W24/08

Abstract: An interference detection method and system and for providing information about at least one interference in I/Q data obtained over-the-air or detected on a link between a radio equipment controller (REC) and at least one radio equipment (RE). The method includes noise filtering a set of the FFTs into an averaged FFT, filtering the averaged FFT with a high-pass filter to remove low frequency components, applying a power threshold on the high-pass filtered FFT to select at least one candidate peak having a power greater than the power threshold; outputting information about the at least one candidate peak, which is a potential interference. The interference detection method further includes multi-lane processing and power shift compensation.

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.

公开(公告)号：USD875578S1

公开(公告)日：2020-02-18

申请号：US29664953

申请日：2018-09-28

Applicant: EXFO INC.

Designer： Michael Simard

公开(公告)号：US20190391041A1

公开(公告)日：2019-12-26

申请号：US16447383

申请日：2019-06-20

Applicant: EXFO Inc.

Inventor： Robert BARIBAULT

IPC: G01M11/08 ,  G01M11/00

Abstract: There is provided an optical-fiber connector endface inspection microscope system comprising optical power measurement capability, wherein optical power measurement is provided via an optical power meter device implemented within an extension unit positioned along an optical path between the inspected optical-fiber connector endface and the optical-fiber connector endface inspection microscope, i.e. between the inspected optical-fiber connector endface and objective optics of the optical-fiber connector endface inspection microscope.

公开(公告)号：USD866575S1

公开(公告)日：2019-11-12

申请号：US29597779

申请日：2017-03-20

Applicant: EXFO INC.

Designer： Léo Gagné ,  Vincent Racine ,  Robert Baribault ,  Eric Dorion ,  Samuel Magny

公开(公告)号：US20190305845A1

公开(公告)日：2019-10-03

申请号：US16445992

申请日：2019-06-19

Applicant: EXFO Inc.

Inventor： Normand CYR ,  Gang HE ,  Bernard RUCHET

IPC: H04B10/079

Abstract: Method and systems for characterizing an optical signal propagating along a communication link are disclosed. The signal includes a data-carrying signal contribution, modulated at a symbol frequency, and a noise contribution. The method includes measuring an optical power spectrum of the signal, which includes a data-carrying signal spectrum component and a noise spectrum component. The method also includes determining a measured spectral correlation function within pairs of spectral components of the signal as a function of center frequency of the pairs, the spectral components in each pair being spectrally separated from each other by the symbol frequency. The method further includes obtaining a solution for the data-carrying signal spectrum component based on the measured optical power spectrum, such that a calculated spectral correlation function based on the solution matches the measured spectral correlation function. In some embodiments, the spectral correlation function is measured as a low-frequency beatnote amplitude function.