公开(公告)号：US11271641B1

公开(公告)日：2022-03-08

申请号：US16740953

申请日：2020-01-13

Applicant: EXFO Inc.

Inventor： Stephane Perron

IPC: H04B10/071 ,  G01M11/00

Abstract: There is therefore provided an OTDR method for characterizing an optical fiber link, wherein a receive device comprising a reflective optical signature and a receive fiber is connected at a remote end of the optical fiber link under test. The reflective optical signature is detected using an OTDR acquisition and link continuity is verified. Because detection of the reflective optical signature rely on high-intensity reflective peaks of the reflective optical signature and not on RBS level, dynamic range constraints are relaxed and so is the averaging time. Advantageously, the method may be employed to detect the reflective optical signature, verify link continuity, measure total link length, measure total insertion loss and/or determine a polarity of a multi-fiber array cable link.

公开(公告)号：USD935921S1

公开(公告)日：2021-11-16

申请号：US29704554

申请日：2019-09-05

Applicant: EXFO Inc.

Designer： Patrice Gonay

公开(公告)号：US11121785B2

公开(公告)日：2021-09-14

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：USD923028S1

公开(公告)日：2021-06-22

申请号：US29664955

申请日：2018-09-28

Applicant: EXFO INC.

Designer： Stephane Perron ,  Antoine-Alexandre Michaud

公开(公告)号：US20210072077A1

公开(公告)日：2021-03-11

申请号：US17002970

申请日：2020-08-26

Applicant: EXFO Inc.

Inventor： Nelu RADU

IPC: G01J1/44

Abstract: There is provided an optical power measurement method, an offset calibration method and an optical power meter that is adapted to apply the offset calibration method. The optical power measurement method, the offset calibration method and the optical power meter are characterized in that two temperature sensors are used for more accurate predictions of the optical power offset. A first temperature sensor is positioned to read a temperature of the photodiode and a second temperature sensor is positioned to read a temperature of the PCB ground plane.

公开(公告)号：US20210063274A1

公开(公告)日：2021-03-04

申请号：US16944853

申请日：2020-07-31

Applicant: EXFO Inc.

Inventor： Olivier COTE ,  Nicolas CARON ,  Mario L'HEUREUX ,  Robert BARIBAULT

IPC: G01M11/00 ,  G06T7/00 ,  G06T7/62

Abstract: There is therefore provided a method, system and computer program for detecting duplicate optical-fiber connector endface inspections performed on a same optical-fiber connector. Duplicate optical-fiber connector endface inspections can be detected by extracting a signature of the optical-fiber connector endface from the acquired optical-fiber connector endface inspection image to uniquely identify the optical-fiber connector and detect duplicate optical-fiber connector endface inspections. The signature can be stored to help detection of inadvertent or fraudulent duplicate or repetitive measurements made on a same optical-fiber connector.

公开(公告)号：US10862582B1

公开(公告)日：2020-12-08

申请号：US16510396

申请日：2019-07-12

Applicant: EXFO Inc.

Inventor： Mario L'Heureux ,  Stephane Perron

IPC: H04B10/035 ,  H05B45/20 ,  H04B10/071 ,  G01M11/00 ,  G01D5/353 ,  H05B45/22

Abstract: There is provided an OTDR receive device, an OTDR system comprising an OTDR receive device and an OTDR method 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.

公开(公告)号：US20200252125A1

公开(公告)日：2020-08-06

申请号：US16852600

申请日：2020-04-20

Applicant: EXFO Inc.

Inventor： Jean-Sébastien Martel ,  Stéphane Perron

IPC: H04B10/071 ,  H04B10/079 ,  H04Q11/00 ,  H04B10/27 ,  H04B10/25

Abstract: Fronthaul monitoring systems and methods include a performing protocol testing, via a protocol layer acquisition module, of a protocol layer signal for analysis thereof to identify issues; performing optical physical layer monitoring via an optical physical layer acquisition module to identify optical physical layer issues; and configuring an optical switch to switch an input port connected to the protocol layer acquisition module and the optical physical layer acquisition module over different links of the plurality of links wherein a test coordinator software module is configured to manage the optical switch to coordinate the optical protocol layer analysis of a link and the optical physical layer testing of the link.

公开(公告)号：US20200228210A1

公开(公告)日：2020-07-16

申请号：US16739812

申请日：2020-01-10

Applicant: EXFO Inc.

Inventor： Dominic LAPIERRE ,  Luc GERMAIN ,  Robert MATESEVAC

IPC: H04B15/04 ,  H04B17/30 ,  G01R23/16 ,  H04W24/02 ,  H04L12/26

Abstract: Systems and methods e to automatically analyze and display results of tests of a link include obtaining data from one or more tests of a link, wherein the data includes samples for Antenna Carriers (AxC) for one or more AxCs auto-detected on the link; processing the data to detect peaks on any of the auto-detected AxCs on the link; performing an analysis of any detected peaks to identify any issues on the link; and causing display of a user interface that includes a reporting of any identified issues with the user interface including a display of the identified issues and a spectrum graph.

公开(公告)号：US10574378B2

公开(公告)日：2020-02-25

申请号：US16388367

申请日：2019-04-18

Applicant: EXFO Inc.

Inventor： Bernard Ruchet ,  Mario L'Heureux ,  Daniel Gariepy ,  Etienne Morin-Drouin

IPC: H04B10/079 ,  H04J14/02

Abstract: A device and method for optical power measurement in an optical network supporting upstream and downstream signal propagation along an optical transmission path. An upstream wavelength analyzer receives upstream light extracted from the optical transmission path and is configured to determine an upstream spectral characteristic of the extracted upstream light. A downstream optical power meter assembly receives downstream light extracted from the optical transmission path and is configured to measure an optical power parameter of a downstream signal. A processing unit is configured to determine, based on the upstream spectral characteristic, at least one pass/fail threshold associated with the measured optical power parameter of the downstream signal.