公开(公告)号：US09900087B2

公开(公告)日：2018-02-20

申请号：US15263036

申请日：2016-09-12

Applicant: EXFO INC.

Inventor： Bernard Ruchet

IPC: H04B10/071 ,  H04B10/2581 ,  G01M11/00 ,  G02B6/14

CPC classification number: H04B10/071 ,  G01M11/3136 ,  G01M11/3154 ,  G02B6/14 ,  H04B10/2581

Abstract: A multimode launch system to be connected to an Optical Time-Domain Reflectometer (OTDR) for use in performing at least one OTDR measurement on a multi-fiber array Device Under Test (DUT), the multimode launch system comprising: an optical switch being connectable to the OTDR during use; a launch array device having an end being connectable to the optical switch and another end being connectable to the multi-fiber array DUT during use, the launch array device having a plurality of multimode launch optical fibers each having at least one first guidance parameter being smaller than a corresponding one of at least one second guidance parameter of at least one multimode optical fiber of the optical switch; and a multi-fiber mode conditioner along the launch array device for inducing a preferential attenuation of higher-order optical modes of test light propagated into the multi-fiber array DUT during use.

公开(公告)号：US20160337034A1

公开(公告)日：2016-11-17

申请号：US15220715

申请日：2016-07-27

Applicant: EXFO INC.

Inventor： Bernard Ruchet ,  Gang He

IPC: H04B10/079 ,  H04B10/071 ,  H04B10/2581

CPC classification number: H04B10/07955 ,  G01M11/3145 ,  G01M11/33 ,  H04B10/071 ,  H04B10/2581

Abstract: There is provided a method for measuring an optical power attenuation value of a multimode DUT. The method generally has, using an optical source, propagating test light along a multimode device link having a first multimode device, the multimode DUT and a second multimode device serially connected to one another; said propagating including inducing a preferential attenuation of high-order optical fiber modes of the test light along the first multimode device and along the second multimode device; using an optical power detector, detecting an optical signal resulting from the propagation of the test light along the multimode device link and transmitting an output signal based on the detected optical signal; and using a processor, determining the optical power attenuation value of the multimode DUT based on the output signal.

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：US10270554B2

公开(公告)日：2019-04-23

申请号：US15822339

申请日：2017-11-27

Applicant: EXFO INC.

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

IPC: H04B17/00 ,  H04J14/02 ,  H04B10/079

Abstract: A device and method for optical power measurement in an optical network supporting upstream and downstream signal propagation along an optical transmission path. The device includes an upstream wavelength analyzer receiving upstream light extracted from the optical transmission path and configured to determine an upstream spectral characteristic of the extracted upstream light. The device also includes a downstream filter assembly receiving downstream light extracted from the optical transmission path and configured to spectrally split the extracted downstream light into a plurality of downstream signals, one of which corresponding to a downstream signal of interest. The device further includes a processing unit configured to identify, based on the upstream spectral characteristic, the downstream signal of interest among the downstream filtered signals, and a downstream optical power meter assembly coupled to the downstream filter assembly and configured to measure an optical power parameter of the downstream signal of interest.

公开(公告)号：US10200118B2

公开(公告)日：2019-02-05

申请号：US15867938

申请日：2018-01-11

Applicant: EXFO INC.

Inventor： Bernard Ruchet

IPC: H04B10/071 ,  H04B10/2581 ,  G01M11/00 ,  G02B6/14

Abstract: A multimode launch system to be connected to an Optical Time-Domain Reflectometer (OTDR) for use in performing at least one OTDR measurement on a multi-fiber array Device Under Test (DUT), the multimode launch system comprising: an optical switch being connectable to the OTDR during use; a launch array device having an end being connectable to the optical switch and another end being connectable to the multi-fiber array DUT during use, the launch array device having a plurality of multimode launch optical fibers each having at least one first guidance parameter being smaller than a corresponding one of at least one second guidance parameter of at least one multimode optical fiber of the optical switch; and a multi-fiber mode conditioner along the launch array device for inducing a preferential attenuation of higher-order optical modes of test light propagated into the multi-fiber array DUT during use.

公开(公告)号：US10175142B2

公开(公告)日：2019-01-08

申请号：US15193180

申请日：2016-06-27

Applicant: EXFO INC.

Inventor： Denis Lafrance ,  Bernard Ruchet ,  Robert Baribault

IPC: G01N21/00 ,  G01M11/00 ,  G06T7/00 ,  H04N5/225 ,  H04B10/00 ,  G02B6/38 ,  G02B21/00

Abstract: An inspection system for inspecting a multiple-fiber connector is provided. The inspection system includes a microscope probe and a probe tip configured to provide an optical path between the microscope probe and the multiple-fiber connector. The probe tip and microscope probe are configured so that the field of view of the microscope probe is sufficiently large to cover a portion of the connector surface encompassing a plurality of the optical fiber endfaces. The system further includes a shifting mechanism operable to shift the field of view of the microscope probe between at least two discrete positions over the connector surface. Each discrete position encompasses a different subset of the multiple optical fiber endfaces and optionally at least one positioning reference. A probe tip and a method of inspection are also provided.

公开(公告)号：US20170085317A1

公开(公告)日：2017-03-23

申请号：US15263036

申请日：2016-09-12

Applicant: EXFO INC.

Inventor： Bernard Ruchet

IPC: H04B10/071 ,  H04B10/2581

CPC classification number: H04B10/071 ,  G01M11/3136 ,  G01M11/3154 ,  G02B6/14 ,  H04B10/2581

Abstract: A multimode launch system to be connected to an Optical Time-Domain Reflectometer (OTDR) for use in performing at least one OTDR measurement on a multi-fiber array Device Under Test (DUT), the multimode launch system comprising: an optical switch being connectable to the OTDR during use; a launch array device having an end being connectable to the optical switch and another end being connectable to the multi-fiber array DUT during use, the launch array device having a plurality of multimode launch optical fibers each having at least one first guidance parameter being smaller than a corresponding one of at least one second guidance parameter of at least one multimode optical fiber of the optical switch; and a multi-fiber mode conditioner along the launch array device for inducing a preferential attenuation of higher-order optical modes of test light propagated into the multi-fiber array DUT during use.

公开(公告)号：US09438336B2

公开(公告)日：2016-09-06

申请号：US13965823

申请日：2013-08-13

Applicant: EXFO INC.

Inventor： Gang He ,  Daniel Gariepy ,  Hongxin Chen ,  Bernard Ruchet

IPC: H04B10/073 ,  H04J14/02 ,  H04J14/06 ,  H04B10/079

CPC classification number: H04B10/073 ,  H04B10/0775 ,  H04B10/07953 ,  H04J14/02 ,  H04J14/06

Abstract: There is provided a method for determining a noise parameter characterizing an optical Signal-Under-Test (SUT) having a signal contribution, an Amplified Spontaneous Emission (ASE) noise contribution and a non-ASE optical noise contribution, such as a carrier-leakage contribution or a depolarized-signal contribution, within an optical-signal bandwidth. The method comprises acquiring optical spectrum trace(s) of the SUT, discriminating at least the non-ASE optical noise contribution from the ASE-noise contribution using the optical spectrum trace(s) and/or a trace obtained from the optical spectrum trace(s); and determining the noise parameter using discriminated non-ASE optical noise contribution and/or the discriminated ASE-noise contribution.

Abstract translation: 提供了一种用于确定表征具有信号贡献，放大自发发射（ASE）噪声贡献和非ASE光学噪声贡献的光信号不足（SUT）的噪声参数的方法，例如载波泄漏 贡献或去极化信号贡献，在光信号带宽内。 该方法包括获取SUT的光谱轨迹，使用光谱轨迹和/或从光谱轨迹获得的轨迹来区分来自ASE-噪声贡献的至少非ASE光学噪声贡献（和 s）; 以及使用鉴别的非ASE光学噪声贡献和/或所识别的ASE-噪声贡献来确定噪声参数。

公开(公告)号：US20160197674A1

公开(公告)日：2016-07-07

申请号：US15069365

申请日：2016-03-14

Applicant: EXFO Inc.

Inventor： Bernard Ruchet ,  Normand Cyr

IPC: H04B10/079

CPC classification number: H04B10/07955 ,  H04B3/46 ,  H04B10/079 ,  H04B10/0793 ,  H04B10/0795 ,  H04B10/07953 ,  H04Q11/0067 ,  H04Q2011/0083

Abstract: A portable apparatus for measuring optical powers of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S1) only if it continues to receive a second optical signal (S2) from the other of said elements, comprises first and second connector means for connecting the apparatus into the optical transmission path in series therewith, and propagating and measuring means connected between the first and second connector means for propagating at least the second optical signal (S2) towards the one of the elements, and measuring the optical powers of the concurrently propagating optical signals (S1, S2). The measurement results may be displayed by a suitable display unit. Where one element transmits signals at two different wavelengths, the apparatus may separate parts of the corresponding optical signal portion according to wavelength and process them separately.

Abstract translation: 一种用于测量在两个元件之间的光传输路径中以相反方向同时传播的光信号的光功率的便携式设备，所述元件中的至少一个仅在其继续接收第二光信号 来自所述元件中的另一个的信号（S2）包括用于将设备串联连接到光传输路径中的第一和第二连接器装置，以及连接在第一和第二连接器装置之间的传播和测量装置，用于至少传播第二光学 信号（S2），并且测量同时传播的光信号（S1，S2）的光功率。 测量结果可以由合适的显示单元显示。 当一个元件以两个不同的波长发射信号时，该装置可以根据波长分离对应的光信号部分的部分并分别处理它们。

公开(公告)号：US09287974B2

公开(公告)日：2016-03-15

申请号：US14468890

申请日：2014-08-26

Applicant: EXFO Inc.

Inventor： Bernard Ruchet ,  Normand Cyr

IPC: H04B10/08 ,  H04B10/079 ,  H04B3/46 ,  H04Q11/00

CPC classification number: H04B10/07955 ,  H04B3/46 ,  H04B10/079 ,  H04B10/0793 ,  H04B10/0795 ,  H04B10/07953 ,  H04Q11/0067 ,  H04Q2011/0083

Abstract: A portable apparatus for measuring parameters of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S1) only if it continues to receive a second optical signal (S2) from the other of said elements, comprises first and second connector means for connecting the apparatus into the optical transmission path in series therewith, and propagating and measuring means connected between the first and second connector means for propagating at least the second optical signal (S2) towards the one of the elements, and measuring the parameters of the concurrently propagating optical signals (S1, S2). The measurement results may be displayed by a suitable display unit. Where one element transmits signals at two different wavelengths, the apparatus may separate parts of the corresponding optical signal portion according to wavelength and process them separately.

Abstract translation: 一种用于测量在两个元件之间的光传输路径中以相反方向同时传播的光信号的参数的便携式设备，所述元件中的至少一个仅在其继续接收第二光信号时才发送第一光信号（S1） （S2）包括用于将设备串联连接到光传输路径中的第一和第二连接器装置，以及连接在第一和第二连接器装置之间的传播和测量装置，用于至少传播第二光信号 （S2），并且测量同时传播的光信号（S1，S2）的参数。 测量结果可以由合适的显示单元显示。 当一个元件以两个不同的波长发射信号时，该装置可以根据波长分离对应的光信号部分的部分并分别处理它们。