公开(公告)号：USD796524S1

公开(公告)日：2017-09-05

申请号：US29554733

申请日：2016-02-15

Applicant: EXFO INC.

Designer： Jean-Sébastien Martel

公开(公告)号：US09733616B2

公开(公告)日：2017-08-15

申请号：US14368625

申请日：2012-12-21

Applicant: EXFO INC.

Inventor： Bernard Ruchet ,  Normand Cyr

IPC: G01B9/021 ,  G03H1/08 ,  G02B6/38 ,  G02B21/00 ,  G01N21/94 ,  G01M11/08

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.

公开(公告)号：US09641243B2

公开(公告)日：2017-05-02

申请号：US15050146

申请日：2016-02-22

Applicant: EXFO INC.

Inventor： Stéphane Perron

IPC: H04B10/071

CPC classification number: H04B10/071

Abstract: A safe-mode OTDR method for characterizing an optical fiber link is provided, as well as an OTDR apparatus operating under such a safe mode. The method includes performing OTDR acquisitions along the fiber link using an OTDR apparatus connected at a proximal end of the optical fiber link, and operating under OTDR acquisition conditions that have been deemed safe for a communication device at a distal end of the fiber link. The obtained reflectometric trace, representing a proximal portion of the optical fiber link, is used to determine a partial-link loss value associated with the proximal portion of the fiber link. Modified acquisition conditions that are safe for the communication device are determined based on the partial-link loss value and on loss-related maximum rating parameters for the communication device. The process is repeated using the modified OTDR acquisition conditions until the end of the link has been reached.

公开(公告)号：US09571186B2

公开(公告)日：2017-02-14

申请号：US14860277

申请日：2015-09-21

Applicant: EXFO INC.

Inventor： Stéphane Perron ,  Michel Leblanc

IPC: G01M11/00 ,  H04B10/071

CPC classification number: H04B10/071 ,  G01M11/3127 ,  G01M11/3136 ,  G01M11/3145

Abstract: An OTDR device and method for characterizing one or more events in an optical fiber link are provided. A plurality of light acquisitions is performed. For each light acquisition, test light pulses are propagated in the optical fiber link and the corresponding return light signals from the optical fiber link are detected. The light acquisitions are performed under different acquisition conditions, for example using different pulsewidths or wavelengths. Parameters characterizing the event are derived using the detected return signal from at least two of the plurality of light acquisitions.

Abstract translation: 提供了用于表征光纤链路中的一个或多个事件的OTDR设备和方法。 进行多次光采集。 对于每个光采集，测试光脉冲在光纤链路中传播，并且检测来自光纤链路的相应返回光信号。 光采集在不同的采集条件下进行，例如使用不同的脉冲宽度或波长。 使用来自多个光采集中的至少两个的检测到的返回信号导出表征事件的参数。

公开(公告)号：US09450854B2

公开(公告)日：2016-09-20

申请号：US14212144

申请日：2014-03-14

Applicant: EXFO INC.

Inventor： Sylvain Nadeau ,  Sébastien Prieur ,  Dominic Lapierre

IPC: H04L12/26

CPC classification number: H04L43/50 ,  H04L43/12

Abstract: Method and test device for performing testing in a network conveying a plurality of traffic flows. At the test device, receiving traffic flows through a first interface of the test device on a first segment and forwarding the received plurality of traffic flows towards a second segment of the network through a second interface. At the test device, receiving a test request directed to an address of a test module and, in response to the test request, causing a sequence of proprietary traffic to be injected on the second segment. A reprogrammable test device comprising a networked test module at least in part on a reprogrammable partition of a programmable logic device and a reprogramming module, on a static partition of the programmable logic device, for reprogramming at least a portion of the reprogrammable partition implementing the test module in accordance with reprogramming data received at the test device.

Abstract translation: 用于在传送多个业务流的网络中执行测试的方法和测试设备。 在测试设备处，接收业务流经第一段的测试设备的第一接口，并通过第二接口将接收的多个业务流转发到网络的第二段。 在测试设备处，接收针对测试模块的地址的测试请求，并且响应于测试请求，导致专用流量序列被注入到第二段上。 一种可再编程测试装置，其包括至少部分地在可编程逻辑器件的静态分区上的可编程逻辑器件和重新编程模块的可重新编程分区的网络测试模块，用于重新编程实现测试的可重编程分区的至少一部分 模块根据在测试设备接收到的重新编程数据。

公开(公告)号：USD763712S1

公开(公告)日：2016-08-16

申请号：US29525600

申请日：2015-04-30

Applicant: EXFO INC.

Designer： Pascal Recoura-Massaquant ,  Patrice Gonay ,  Hicham Maalouf ,  Sylvain Bilodeau

公开(公告)号：US20160218802A1

公开(公告)日：2016-07-28

申请号：US14966628

申请日：2015-12-11

Applicant: EXFO INC.

Inventor： Bernard Ruchet ,  Gang He

IPC: H04B10/079

CPC classification number: H04B10/07955 ,  G01M11/33

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.

Abstract translation: 提供了一种用于测量多模DUT的光功率衰减值的方法。 该方法通常使用光源，沿着具有第一多模器件的多模器件链路传播测试光，多模DUT和彼此串联连接的第二多模器件; 所述传播包括沿第一多模设备和沿第二多模设备诱导测试光的高阶光纤模式的优先衰减; 使用光功率检测器，检测由沿着多模设备链路的测试光的传播而产生的光信号，并且基于检测到的光信号发送输出信号; 以及使用处理器，基于所述输出信号确定所述多模DUT的光功率衰减值。

公开(公告)号：US20150346054A1

公开(公告)日：2015-12-03

申请号：US14820707

申请日：2015-08-07

Applicant: EXFO INC.

Inventor： Mario L'Heureux ,  Michel Leclerc ,  Eric Thomassin ,  Stephane Perron

IPC: G01M11/00

CPC classification number: G01M11/3145 ,  G01M11/3109 ,  G01M11/3118 ,  G01M11/39

Abstract: There is provided a bi-directional optical reflectometric method for characterizing an optical fiber link. The method comprises: performing at least one forward-direction light acquisition from one end of the optical fiber link and performing at least one backward-direction light acquisition from the opposite end, wherein each light acquisition is performed by propagating at least one test light signal corresponding to given spatial resolution and detecting corresponding return light so as to obtain a reflectometric trace representing backscattered and reflected light as a function of a distance on the optical fiber link, and wherein said forward-direction light acquisition and said backward-direction light acquisition are performed with mutually different spatial resolutions; and deriving a value of at least one parameter characterizing an event at a location along said optical fiber link at least using the forward-direction light acquisition and the backward-direction light acquisition performed with mutually different spatial resolutions.

Abstract translation: 提供了用于表征光纤链路的双向光学反射测量方法。 该方法包括：从光纤链路的一端执行至少一个正向光采集，并从相对端执行至少一个反向光采集，其中每个光采集通过传播至少一个测试光信号 对应于给定的空间分辨率并检测相应的返回光，以获得表示作为光纤链路上的距离的函数的反向散射和反射光的反射光线，其中所述前向光获取和所述反向光获取是 以相互不同的空间分辨率进行; 以及至少使用以相互不同的空间分辨率执行的前向光采集和反向光采集，沿着所述光纤链路的位置导出表征事件的至少一个参数的值。

公开(公告)号：US09134197B2

公开(公告)日：2015-09-15

申请号：US14014606

申请日：2013-08-30

Applicant: EXFO INC.

Inventor： Mario L'Heureux ,  Michel Leclerc ,  Eric Thomassin ,  Stephane Perron

IPC: G01N21/00 ,  G01M11/00

CPC classification number: G01M11/3145 ,  G01M11/3109 ,  G01M11/3118 ,  G01M11/39

Abstract: There is provided a bi-directional optical reflectometric method for characterizing an optical fiber link. The method comprises: performing a plurality of forward-direction light acquisitions from one end of the optical fiber link and performing a plurality of backward-direction light acquisitions from the opposite end, wherein each light acquisition is performed by propagating at least one test light signal corresponding to given spatial resolution and detecting corresponding return light so as to obtain a reflectometric trace representing backscattered and reflected light as a function of a distance on the optical fiber link, and wherein said plurality of forward-direction light acquisitions and said plurality of backward-direction light acquisitions are each performed with mutually different spatial resolutions; and deriving a value of at least one parameter characterizing an event along said optical fiber link at least using a forward-direction light acquisition and a backward-direction light acquisition performed with mutually different spatial resolutions.

Abstract translation: 提供了用于表征光纤链路的双向光学反射测量方法。 该方法包括：从光纤链路的一端执行多个正向光采集，并从相对端执行多个反向光采集，其中每个光采集通过传播至少一个测试光信号 对应于给定的空间分辨率并检测相应的返回光，以便获得表示作为光纤链路上的距离的函数的反向散射和反射光的反射光迹，并且其中所述多个正向光采集和所述多个向后光取样， 方向光采集各自以相互不同的空间分辨率进行; 以及至少使用以相互不同的空间分辨率执行的前向光采集和反向光采集，沿着所述光纤链路导出表征事件的至少一个参数的值。

公开(公告)号：US20130330071A1

公开(公告)日：2013-12-12

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

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。