公开(公告)号：US20150092363A1

公开(公告)日：2015-04-02

申请号：US14471047

申请日：2014-08-28

Applicant: EXFO Inc.

Inventor： Michel Blier ,  Patrick Begin ,  Sergio Prestipino

IPC: H05K1/18

CPC classification number: H05K1/189 ,  G02B6/00 ,  G02B6/4246 ,  G02B6/4284 ,  H05K1/0243 ,  H05K2201/10189

Abstract: There is provided an adapter device for connecting and interfacing a transceiver module in conformance with first mechanical specifications and first connector specifications into a host socket adapted to receive transceiver modules in conformance with second mechanical specifications and second connector specifications. The adapter device comprises: a rigid-flex circuit board having first and second levels of rigid circuit board portions and a flexible circuit board portion interconnecting the two levels to convey high-speed electrical signals therebetween, the two levels being integral with said flexible circuit board portion; a first connector mounted on the first level of rigid circuit board and in conformance with the first connector specifications, for electrically connecting the transceiver module to the adapter device to convey high-speed signals; and a second connector mounted on the second level of rigid circuit board and in conformance with the second connector specifications, for electrically connecting the adapter device into the host socket to convey high-speed signals.

Abstract translation: 提供了适配器装置，用于根据第一机械规格和第一连接器规格将收发器模块连接和接口到适于接收符合第二机械规格和第二连接器规格的收发器模块的主机插座中。 适配器装置包括：刚性 - 柔性电路板，具有第一和第二层的刚性电路板部分和柔性电路板部分，其互连两个层以在其间传送高速电信号，两个层级与所述柔性电路板 一部分; 第一连接器，其安装在刚性电路板的第一层上并且符合第一连接器规格，用于将收发器模块电连接到适配器装置以传送高速信号; 以及安装在刚性电路板的第二层上并符合第二连接器规格的第二连接器，用于将适配器装置电连接到主机插座以传送高速信号。

公开(公告)号：US20140327735A1

公开(公告)日：2014-11-06

申请号：US14368625

申请日：2012-12-21

Applicant: EXFO INC.

Inventor： Bernard Ruchet ,  Normand Cyr

IPC: G03H1/08

CPC classification number: G03H1/0866 ,  G01B9/021 ,  G01M11/088 ,  G01N21/94 ,  G01N2201/0627 ,  G02B6/385 ,  G02B21/0016

Abstract: A portable inspection probe for the inspection of a recessed mating surface of an optical fiber connector is provided. In one variant, the portable inspection probe includes a digital holographic detection module operable to digitally record a hologram of the recessed mating surface, and a rigid probe tip configured to be optically coupled to the digital holographic detection module and shaped to provide optical access to the recessed mating surface. In another variant, the portable inspection probe is to be used with a rigid probe tip connectable thereto, and the digital holographic detection module includes a probing optical assembly not traversed by a reference beam and configured to direct an object beam onto the recessed mating surface and to collect the object beam upon reflection thereof by the recessed mating surface. An inspection system and an inspection method are also provided.

Abstract translation: 提供了用于检查光纤连接器的凹入配合表面的便携式检查探针。 在一个变型中，便携式检查探针包括数字全息检测模块，可操作以数字地记录凹入的配合表面的全息图;以及刚性探针末端，被配置为光学耦合到数字全息检测模块，并成形为提供对 嵌合配合面。 在另一个变型中，便携式检查探针将与可连接到其上的刚性探针末端一起使用，并且数字全息检测模块包括探测光学组件，其不被参考光束穿过并被配置为将物体光束引导到凹入的配合表面上， 以通过凹入的配合表面反射来收集物体光束。 还提供了检查系统和检查方法。

公开(公告)号：US20140146312A1

公开(公告)日：2014-05-29

申请号：US14092227

申请日：2013-11-27

Applicant: EXFO Inc.

Inventor： Stephane Perron ,  Michel Leclerc

IPC: G01M11/00

CPC classification number: G01M11/3145 ,  G01M11/3118

Abstract: There is provided an optical reflectometric method and system for characterizing an optical fiber link, wherein events in the fiber optic link under test are identified and values of parameters characterizing the events (e.g. location, insertion loss and reflectance) are extracted from an analysis of one or more reflectometric measurements performed on the optical fiber link. A loss profile and/or a reflectance profile are then constructed. The loss and reflectance profiles are typically displayed on screen or otherwise graphically represented for an operator to be able to appreciate the measurement results at a single glance.

Abstract translation: 提供了用于表征光纤链路的光学反射测量方法和系统，其中识别被测光纤链路中的事件，并且从一个分析中提取表征事件（例如位置，插入损耗和反射率）的参数值 或更多的反射测量在光纤链路上执行。 然后构造损耗曲线和/或反射率分布。 损耗和反射率分布通常显示在屏幕上，或以其它方式表示为操作者，以便能够一目了然地了解测量结果。

公开(公告)号：US20240255713A1

公开(公告)日：2024-08-01

申请号：US18420965

申请日：2024-01-24

Applicant: EXFO Inc.

Inventor： Olivier COTE ,  Jean Filion ,  Raphael LABERGE

IPC: G02B6/38

CPC classification number: G02B6/3898 ,  G02B6/3825 ,  G02B6/385

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 two non-parallel APC optical-fiber endfaces of a duplex (i.e., APC trans-duplex) optical-fiber connector. Because the two optical-fiber endfaces of an APC trans-duplex connector are angled-polished (APC) in different directions (non-parallel), inspection light reflected on the two endfaces take diverging pathways. A single-fiber or multi-fiber inspection microscope therefore cannot allow inspection of both optical-fiber endfaces at once. The proposed adapter tip or microscope system comprises relay optics defining two imaging paths (one for each optical-fiber endface), wherein each imaging path comprises at least one optical component (e.g., an optical prism) used to deviate inspection light from each endface towards the optical axis of the objective lens, such that both endfaces may be imaged within the field of view of the inspection microscope.

公开(公告)号：US12052134B2

公开(公告)日：2024-07-30

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 ,  G06N5/025 ,  H04L41/0631

CPC classification number: H04L41/08 ,  G06N5/025 ,  H04L41/0631

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：US12050150B2

公开(公告)日：2024-07-30

申请号：US17738295

申请日：2022-05-06

Applicant: EXFO Inc.

Inventor： Michel Leclerc

IPC: G01M11/00 ,  H04B10/071 ,  H04B10/2513

CPC classification number: G01M11/3127 ,  G01M11/3145 ,  H04B10/071 ,  H04B10/2513

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：US20240134076A1

公开(公告)日：2024-04-25

申请号：US18390981

申请日：2023-12-20

Applicant: EXFO Inc.

Inventor： Hongxin CHEN ,  Normand CYR

IPC: G01V1/22 ,  G01V1/00

CPC classification number: G01V1/226 ,  G01V1/001

Abstract: There is provided a method and an apparatus of fiber optic distributed acoustic sensing (DAS) which use a simple, reliable and robust signal processing for amplitude-based DAS measurements. 1) The lack of linearity of the amplitude-based DAS measurements (due to its unpredictable variation of the transfer function along the fiber) can be improved by normalizing the amplitude vs distance using an amplitude-normalization trace obtained from either a) coherent laser OTDR measurements with laser frequency dithering or b) computing a normalization trace from the coherent OTDR/DAS traces and the un-coherent OTDR/DAS traces. 2) Instrument offset (e.g., due to low vertical sampling resolution) may further be corrected using un-coherent OTDR/DAS traces to extract an instrument system offset.

公开(公告)号：US20240012167A1

公开(公告)日：2024-01-11

申请号：US18329133

申请日：2023-06-05

Applicant: EXFO Inc.

Inventor： Hongxin CHEN ,  Michel LEBLANC ,  Michel LECLERC

IPC: G01V1/22 ,  G01V1/00

CPC classification number: G01V1/226 ,  G01V1/001

Abstract: There is provided a method and an apparatus of fiber optic distributed acoustic sensing (DAS) which can use low-cost coherent laser as well as low-cost acquisition and processing electronics and which can still provide reliable monitoring results for optical fiber monitoring and troubleshooting applications in optical fiber telecommunication networks. Such low-cost solution is made possible by employing grouped data signal processing. Data is processed over independent groups of data to provide an independent DAS signal for each group. This allows measurements to be less sensitive to laser fluctuations and thereby reduces coherent laser technical specification requirements and allows the use of a low-cost coherent laser (thereby reducing the cost of the laser) as well as low-cost acquisition and processing electronics.

公开(公告)号：US11624680B2

公开(公告)日：2023-04-11

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 ,  G01N21/88 ,  G01N21/95

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：US11595125B2

公开(公告)日：2023-02-28

申请号：US17183415

申请日：2021-02-24

Applicant: EXFO Inc.

Inventor： Gang He ,  Daniel Gariepy

IPC: H04B17/00 ,  H04B10/079 ,  H04B10/073

Abstract: There is herein provided a method for measuring the GOSNR that can be implemented using commercial-grade transceivers and which accounts for linear optical impairments (e.g. PMD, PDL and CD) and transceiver intrinsic impairments. The method may be implemented using an Optical Spectrum Analyzer (OSA) and either the system transceivers or other commercial-grade transceivers. The proposed measurement method is based on mixed optical and electronic technologies, using an OSA and a transceiver pair. By measuring a signal quality metric Qm and the OSNR under varied power and ASE noise conditions, a constant value RBW that relates the GOSNR to the signal quality metric Qm is derived. The GOSNR is then obtained from these results.