公开(公告)号：US20220390321A1

公开(公告)日：2022-12-08

申请号：US17738295

申请日：2022-05-06

Applicant: EXFO Inc.

Inventor： Michel LECLERC

IPC: G01M11/00

Abstract: There is provided a technique to reduce the Rayleigh coherence noise in OTDR measurements using spectral averaging of OTDR traces while at least partly cancelling chromatic dispersion pulse broadening on the averaged OTDR trace by applying a chromatic dispersion correction prior to averaging the OTDR traces. By correcting for chromatic dispersion pulse broadening, it allows to reduce the Rayleigh coherence noise without impacting the OTDR spatial resolution.

公开(公告)号：US11514651B2

公开(公告)日：2022-11-29

申请号：US17337648

申请日：2021-06-03

Applicant: EXFO Inc.

Inventor： Jean Fontaine ,  Vinay Mandy

IPC: G06T19/00 ,  G06T15/20 ,  G06N20/00 ,  G06T19/20

Abstract: Systems and methods for utilizing Augmented Reality (AR) processes to track cables among a tangled bundle of cables are provided. An AR method, according to one implementation, includes a step of obtaining an initial captured image showing a bundle of cables. The AR method also includes the step of processing the initial captured image to distinguish a selected cable from other cables of the bundle of cables. Also, the AR method includes displaying the initial captured image on a display screen while visually augmenting an image of the selected cable to highlight the selected cable with respect to the other cables.

公开(公告)号：USD960732S1

公开(公告)日：2022-08-16

申请号：US29761041

申请日：2020-12-07

Applicant: EXFO Inc.

Designer： Olivier Patry

公开(公告)号：USD960731S1

公开(公告)日：2022-08-16

申请号：US29761040

申请日：2020-12-07

Applicant: EXFO Inc.

Designer： Olivier Patry

公开(公告)号：US20220247620A1

公开(公告)日：2022-08-04

申请号：US17649219

申请日：2022-01-28

Applicant: EXFO Inc.

Inventor： Hai Hong Phan Vu ,  Justin Whatley ,  Brigitte Jaumard ,  Tristan Glatard ,  Sylvain Nadeau

IPC: H04L41/08

Abstract: An embodiment involves obtaining a tabular data set with columns that characterize items relating to behavior of components of a communication network; constructing a frequent-pattern tree, each node being associated with: (i) an item-name for representing an item, (ii) a count of transactions from a root node of the tree to the respective node, and (iii) node-links that refer to other nodes in the tree that represent items having the same item-name; traversing the tree to identify a set of nodes with counts greater than a predefined support threshold; generating, from the nodes, association-rules that are based on antecedent items associated with a target item; reducing the association-rules by (i) removing the association-rules in which the antecedent items thereof are a superset or subset of the antecedent items of a further association-rule, or (ii) combining the association-rules that have antecedent items that are at least partially disjoint and conditionally dependent.

公开(公告)号：US20220244293A1

公开(公告)日：2022-08-04

申请号：US17648876

申请日：2022-01-25

Applicant: EXFO Inc.

Inventor： Dominic LAPIERRE ,  Martin LEVESQUE ,  Jean-Pierre COUDERT

IPC: G01R13/02

Abstract: In order to improve the analysis of the RF interferences, there is provided a peak selection assistance method for finding a local peak in an RF spectrum trace. The method provides a window on the spectrum trace display, which can be configured and/or moved by a user from user interaction on said user interface. When the window is defined, the method finds the highest peak within the window and optionally adds a marker on it. The method therefore snaps to the highest peak within the window. This improves the way of precisely detecting the maximum amplitude and the center frequency for any local peak on the spectrum.

公开(公告)号：US20220074810A1

公开(公告)日：2022-03-10

申请号：US17446368

申请日：2021-08-30

Applicant: EXFO Inc.

Inventor： Mario L'HEUREUX ,  Guillaume LAVALLEE ,  Robert BARIBAULT

IPC: G01M11/00 ,  G01M11/02 ,  G02B6/38 ,  G06T7/00

Abstract: There are provided an optical-fiber connector endface inspection microscope system and a method for inspecting an endface of an optical-fiber connector. The inspection microscope device is releasably connectable to an adapter tip configured to interface with the optical-fiber connector to inspect the endface thereof. The adapter tip is one among a plurality of adapter tip types adapted to inspect respective types of optical-fiber connectors. The optical-fiber connector endface inspection microscope system comprises a tip detection system adapted to recognize the type of the adapter tip among the plurality of adapter tip types; and is configured to analyze inspection images to produce an inspection result for the endface, at least partly based on a fiber type corresponding to the recognized adapter tip and/or other information read by the tip detection system.

公开(公告)号：US20210398355A1

公开(公告)日：2021-12-23

申请号：US17337648

申请日：2021-06-03

Applicant: EXFO Inc.

Inventor： Jean Fontaine ,  Vinay Mandy

IPC: G06T19/00 ,  G06T15/20 ,  G06T19/20 ,  G06N20/00

Abstract: Systems and methods for utilizing Augmented Reality (AR) processes to track cables among a tangled bundle of cables are provided. An AR method, according to one implementation, includes a step of obtaining an initial captured image showing a bundle of cables. The AR method also includes the step of processing the initial captured image to distinguish a selected cable from other cables of the bundle of cables. Also, the AR method includes displaying the initial captured image on a display screen while visually augmenting an image of the selected cable to highlight the selected cable with respect to the other cables.

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.