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11. 发明公开

EP2351263A2 SAMPLING-BASED BALANCED DETECTION SYSTEM 有权
标题翻译：抽样基于视觉的检测系统平衡
公开(公告)号：EP2351263A2
公开(公告)日：2011-08-03
申请号：EP09815161.6
申请日：2009-09-17
申请人： Exfo Inc.
发明人： WESTLUND, Mathias , ANDREKSON, Peter , SUNNERUD, Henrik , SKOLD, Mats
IPC分类号： H04B10/12 , H04B10/00 , H04B10/02
CPC分类号： H04B10/697 , H04B10/677
摘要： A two-gate sampling system has been designed to perform sampled balanced detection of one or more input signal pairs. The present invention performs simultaneous sampling of both signals in each signal pair followed by digitization and combination of the sample pairs using software. By first sampling the signals and then combining the sampled into the corresponding balanced detected signal it is possible to avoid the bandwidth limitations and impedance problems introduced by traditional balanced detectors and electrical oscilloscopes. In particular, for optical sampling gates very high bandwidth sampling gates can be designed without any impedance issues and hence almost perfect balanced detection reconstruction can be performed for very high speed signals. Balanced detection is becoming more and more important as the new phase modulated optical data signals are introduced to the market, such as e.g. PSK, DPSK, QPSK and DQPSK. The present invention is well suited for analysis of these new types of signals.

12. 发明公开

EP4343292A2 METHOD AND APPARATUS OF DISTRIBUTED ACOUSTIC SENSING 审中-实审
公开(公告)号：EP4343292A2
公开(公告)日：2024-03-27
申请号：EP24151043.7
申请日：2023-07-04
申请人： EXFO Inc.
发明人： CHEN, Hongxin , LEBLANC, Michel , LECLERC, Michel , CYR, Normand
IPC分类号： G01H9/00
摘要： 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.

13. 发明公开

EP4006601A1 OPTICAL FIBER ENDFACE INSPECTION MICROSCOPE HAVING A SWAPPABLE OPTICAL HEAD 有权
公开(公告)号：EP4006601A1
公开(公告)日：2022-06-01
申请号：EP21210420.2
申请日：2021-11-25
申请人： EXFO Inc.
发明人： COTE, Olivier , SALAHDDINE, Aymen , L`HEUREUX, Mario
IPC分类号： G02B6/38 , G01M11/00
摘要： There is provided an optical-fiber connector endface inspection microscope system for inspecting an endface of an optical-fiber connector. It comprises one or more image detector for capturing at least one image of the endface to be inspected; an objective lens system comprising a focusing lens for adjusting a focus of the objective lens system on the image detector and a fixed relay lens; a main housing structure enclosing the image detector and the focusing lens; and at least one interchangeable optical head releasably connectable to the main housing structure and enclosing the fixed relay lens, wherein the optical head is releasably connectable to an adapter tip for interfacing with the optical-fiber connector to be inspected.

14. 发明授权

EP2467955B1 IN-BAND OPTICAL NOISE MEASUREMENT USING DIFFERENTIAL POLARIZATION RESPONSE 有权转让
公开(公告)号：EP2467955B1
公开(公告)日：2019-01-16
申请号：EP10809409.5
申请日：2010-08-19
申请人： EXFO Inc.
发明人： HE, Gang , CYR, Normand
IPC分类号： H04B10/07

15. 发明授权

EP3148098B1 OPTICAL POWER MEASUREMENT IN A PASSIVE OPTICAL NETWORK 有权转让
公开(公告)号：EP3148098B1
公开(公告)日：2018-10-31
申请号：EP16189587.5
申请日：2016-09-20
申请人： EXFO Inc.
发明人： Ruchet, Bernard , L'Heureux, Mario , Gariepy, Daniel
IPC分类号： H04B10/079
CPC分类号： H04B10/07955 , H04B10/079 , H04B10/27 , H04J14/0221
摘要： A passive optical network (PON) device and method for optical power measurement along an optical transmission path supporting bidirectional propagation of downstream light and upstream light between two network elements of a PON is provided. The device includes an optical power splitter assembly extracting respective portions of the upstream and downstream light, and an upstream wavelength analyzer determining, from the extracted upstream light, an upstream spectral characteristic of the upstream light. The device also includes a processing unit determining, based on the upstream spectral characteristic, a downstream spectral characteristic of a downstream signal of interest among a plurality of downstream signals of the downstream light, and a downstream filter assembly filtering the extracted downstream light to select a portion of the downstream signal of interest. The device further includes a downstream optical power meter assembly measuring an optical power parameter of the selected portion of the downstream signal of interest.

16. 发明公开

EP3148098A1 OPTICAL POWER MEASUREMENT IN A PASSIVE OPTICAL NETWORK 有权转让
标题翻译： EINEM PASSIVEN OPTISCHEN NETZWERK中的MESSUNG OPTISCHER LEISTUNG
公开(公告)号：EP3148098A1
公开(公告)日：2017-03-29
申请号：EP16189587.5
申请日：2016-09-20
申请人： Exfo Inc.
发明人： Ruchet, Bernard , L'Heureux, Mario , Gariepy, Daniel
IPC分类号： H04B10/079
CPC分类号： H04B10/07955 , H04B10/079 , H04B10/27 , H04J14/0221
摘要： A passive optical network (PON) device and method for optical power measurement along an optical transmission path supporting bidirectional propagation of downstream light and upstream light between two network elements of a PON is provided. The device includes an optical power splitter assembly extracting respective portions of the upstream and downstream light, and an upstream wavelength analyzer determining, from the extracted upstream light, an upstream spectral characteristic of the upstream light. The device also includes a processing unit determining, based on the upstream spectral characteristic, a downstream spectral characteristic of a downstream signal of interest among a plurality of downstream signals of the downstream light, and a downstream filter assembly filtering the extracted downstream light to select a portion of the downstream signal of interest. The device further includes a downstream optical power meter assembly measuring an optical power parameter of the selected portion of the downstream signal of interest.
摘要翻译：提供了一种沿着支持PON的两个网络元件之间的下游光和上游光的双向传播的光传输路径进行光功率测量的无源光网络（PON）设备和方法。该装置包括提取上游和下游光的各部分的光功率分配器组件，以及从所提取的上游光确定上游光的上游光谱特性的上行波长分析器。该装置还包括一个处理单元，该处理单元基于上游频谱特性确定下游光的多个下游信号之间的感兴趣的下游信号的下行频谱特性，以及下游滤波器组件，对所提取的下游光进行滤波，以选择感兴趣的下游信号的部分。该装置还包括测量感兴趣的下游信号的选定部分的光功率参数的下游光功率计组件。

17. 发明公开

EP3051266A3 METHOD AND SYSTEM FOR MEASURING AN OPTICAL POWER ATTENUATION VALUE OF A MULTIMODE DEVICE UNDER TEST, RECEIVE DEVICE AND COMPUTER-READABLE MEMORY 有权转让
标题翻译：方法和系统测量多模式设备的光功率损耗值测试接收装置与计算机可读存储
公开(公告)号：EP3051266A3
公开(公告)日：2017-01-25
申请号：EP16152540.7
申请日：2016-01-25
申请人： Exfo Inc.
发明人： Ruchet, Bernard , He, Gang
IPC分类号： G01M11/02
CPC分类号： H04B10/07955 , G01M11/33
摘要： 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.
摘要翻译：提供了一种用于多模式DUT的光功率的衰减值的测量的方法。该方法基因集会具有，采用在光源，沿传播的具有第一多模设备，多模DUT和串联连接到彼此的第二多模设备的多模设备链路测试光; 所述传播包括诱导沿着第一多模设备和沿着所述第二多模设备的测试光的高阶光纤模式的优先衰减; 利用在光功率检测器，检测光学信号沿着多模设备链路的测试光的繁殖所导致和发送到基于所检测的光信号的输出信号的; 和使用处理器，确定性采矿基于所述输出信号的多模DUT的光功率的衰减值。

18. 发明授权

EP2532120B1 TESTING NETWORK COMMUNICATIONS LINKS 有权
标题翻译：测试网络通讯联系
公开(公告)号：EP2532120B1
公开(公告)日：2016-07-06
申请号：EP11739300.9
申请日：2011-02-04
申请人： Exfo Inc.
发明人： GIGUERE, Bruno , PIETTE, Isabelle , GRENIER, Michel
IPC分类号： H04L12/26
CPC分类号： H04L12/2697 , H04L43/50

19. 发明公开

EP3018839A1 IN-BAND NOISE AND/OR SPECTRAL DEFORMATION MEASUREMENT ON POLARIZATION-MULTIPLEXED SIGNALS 有权转让
标题翻译： IN-BAND MESSUNG VON RAUSCHEN UND / ODER SPEKTRALER DEFORMATION AUF POLARISATIONSMULTIPLEXTEN SIGNALEN
公开(公告)号：EP3018839A1
公开(公告)日：2016-05-11
申请号：EP15192157.4
申请日：2015-10-29
申请人： Exfo Inc.
发明人： HE, Gang , GARIEPY, Daniel
IPC分类号： H04B10/077 , H04B10/079
摘要： There is provided a method to discriminate NLE-induced signal deformation from ASE-noise on polarization multiplexed signals, in order to measure the OSNR under NLE conditions and/or characterize the NLE-induced signal deformation. In accordance with one aspect, the method is based on the acquisition of optical spectrum traces when the (data-carrying) optical communication signal is partially or completely extinguished (ASE-noise only), as well as with a live optical communication signal. Comparing traces acquired with different conditions and/or at different dates allows discrimination of the signal contribution, the ASE-noise contribution and the NLE-induced deformations on the SUT.
摘要翻译：提供了一种在偏振复用信号上区分NLE引起的信号变形与ASE噪声的方法，以便在NLE条件下测量OSNR和/或表征NLE引起的信号变形。根据一个方面，该方法基于当（数据携带）光通信信号被部分或完全熄灭（仅ASE-噪声）以及带有实时光通信信号时的光谱踪迹的获取。比较不同条件和/或不同日期获取的踪迹可以区分信号贡献，ASE噪声贡献和NLE引起的SUT变形。

20. 发明公开

EP2974140A1 PASS-THROUGH TEST DEVICE 有权
标题翻译： DURCHGANGSTESTVORRICHTUNG
公开(公告)号：EP2974140A1
公开(公告)日：2016-01-20
申请号：EP14762236.9
申请日：2014-03-14
申请人： Exfo Inc.
发明人： NADEAU, Sylvain , PRIEUR, Sebastien , LAPIERRE, Dominic
IPC分类号： H04L12/26 , H04L12/861
CPC分类号： H04L43/50 , H04L43/12
摘要： 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.
摘要翻译：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，将专用流量序列注入第二段。一种可重编程测试设备，其包括至少部分地在可编程逻辑设备的可编程分区和可编程逻辑器件的静态分区上的重新编程模块的网络化测试模块，用于重新编程实现测试的可重新编程分区的至少一部分模块根据在测试设备处接收到的重新编程数据。

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