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    Polarity receive module
    1.
    发明授权
    Polarity receive module 有权

    公开(公告)号：US11841289B2

    公开(公告)日：2023-12-12

    申请号：US17094883

    申请日：2020-11-11

    Applicant: Lifodas, UAB

    Inventor： Piotr Anatolij Levin ,  Sergej Karpichin

    IPC: G01M11/00 ,  G02B6/38

    CPC classification number: G01M11/3154 ,  G01M11/3109 ,  G01M11/3136 ,  G02B6/385 ,  G02B6/3885 ,  G02B6/3897

    Abstract: The present invention is a passive receive module for use with an OTDR for determining polarity of a cable under test. Only one position of the module connector of the receive module includes a filling and all other positions are occupied with a reflective component with a reflective characteristic distinct from that of the filling. Only one position at the OTDR end of the cable will receive a distinct reflection from all of the other positions. Polarity may be determined from these positions.

    Parallel optics based optical time domain reflectometer acquisition
    3.
    发明授权
    Parallel optics based optical time domain reflectometer acquisition 有权

    公开(公告)号：US11808659B2

    公开(公告)日：2023-11-07

    申请号：US17233015

    申请日：2021-04-16

    Applicant: VIAVI SOLUTIONS INC.

    Inventor： Vincent Lecoeuche

    IPC: G01M11/00

    CPC classification number: G01M11/3136 ,  G01M11/3145

    Abstract: In some examples, parallel optics based optical time domain reflectometer acquisition may include a laser array operatively collimated to an optical fiber array to transmit, in parallel, a plurality of laser beams to optical fibers of the optical fiber array. A photodiode array may receive, in parallel, backscattered and reflected light from the optical fiber array. The photodiode array may determine, based on the backscattered and reflected light, properties of the optical fibers of the optical fiber array.

    LOCATION MEASUREMENT APPARATUS, LIGHT MODULATION CONVERTER, AND LIGHT VARIATION LOCATION MEASUREMENT METHOD
    4.
    发明申请
    LOCATION MEASUREMENT APPARATUS, LIGHT MODULATION CONVERTER, AND LIGHT VARIATION LOCATION MEASUREMENT METHOD 审中-公开

    公开(公告)号：US20180316422A1

    公开(公告)日：2018-11-01

    申请号：US15959582

    申请日：2018-04-23

    Applicant: FUJITSU LIMITED

    Inventor： Tomoyuki Kato ,  Shigeki Watanabe ,  Takeshi Hoshida ,  Takahito Tanimura

    IPC: H04B10/079 ,  H04B10/071 ,  G01M11/00

    CPC classification number: H04B10/0791 ,  G01M11/3136 ,  G01M11/3181 ,  H04B10/071

    Abstract: An apparatus includes a light source that causes continuous oscillation light to enter one terminal of an optical transmission line, wherein the continuous oscillation light is to propagate a light variation of a first physical amount generated on the optical transmission line to another terminal of the optical transmission line; a photodetector that detects, on the one terminal, light turned back from a light modulation converter provided on the another terminal, wherein the light modulation converter obtains the turned-back light by converting the light variation of the first physical amount into a light variation of a second physical amount; and a processor that calculates a light-variation location generated on the optical transmission line by comparing time variations in the light variation of the first physical amount and the light variation of the second physical amount in the light detected by the photodetector.

    Polarity test of fiber arrays based on electronically switched optical signals
    5.
    发明授权
    Polarity test of fiber arrays based on electronically switched optical signals 有权

    公开(公告)号：US10012563B1

    公开(公告)日：2018-07-03

    申请号：US13552557

    申请日：2012-07-18

    Applicant: Xinzhong Wang ,  Yao Li

    Inventor： Xinzhong Wang ,  Yao Li

    IPC: G02B6/04 ,  G01M11/00 ,  G02B6/42

    CPC classification number: G01M11/3136 ,  G01M11/33 ,  G02B6/4249 ,  G02B6/4292

    Abstract: A design of optical testing device or system for fiber arrays is disclosed. According to one aspect of the invention, an array of light sources and an array of detectors are disclosed. One of the light sources is controlled to be turned on to test a designated fiber in an array of fibers being tested for connection issues. A microcontroller is configured to determine which one of the detectors is detecting a light beam from one of the light sources, and mark a channel of the array of fibers accordingly depending on if the one of the detectors is supposed to detect the light beam; if another one of the detectors detects the light beam; or if none of the detectors detects the light beam.

    MULTIMODE LAUNCH SYSTEMS FOR USE IN PERFORMING AN OTDR MEASUREMENT ON A MULTI-FIBER ARRAY DUT AND METHOD OF PERFORMING SAME
    6.
    发明申请
    MULTIMODE LAUNCH SYSTEMS FOR USE IN PERFORMING AN OTDR MEASUREMENT ON A MULTI-FIBER ARRAY DUT AND METHOD OF PERFORMING SAME 审中-公开

    公开(公告)号：US20180131437A1

    公开(公告)日：2018-05-10

    申请号：US15867938

    申请日：2018-01-11

    Applicant: EXFO INC.

    Inventor： Bernard Ruchet

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

    TESTING FIBER ARRANGEMENT IN MULTI-FIBER CABLES
    8.
    发明申请
    TESTING FIBER ARRANGEMENT IN MULTI-FIBER CABLES 审中-公开

    公开(公告)号：US20170234767A1

    公开(公告)日：2017-08-17

    申请号：US15427474

    申请日：2017-02-08

    Applicant: EXFO INC.

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

    IPC: G01M11/00

    CPC classification number: G01M11/3136 ,  G01M11/3145 ,  G01M11/3154

    Abstract: There is provided a system and a test instrument for identifying or verifying the fiber arrangement and/or the cable type of multi-fiber array cables (such as MPO cables) which employs a light source and a polarity detector at the near end of the multi-fiber array cable under test, and a loopback device at the far end. The polarity detector comprises light presence detectors used to detect which one of the optical fibers of the multi-fiber array cable returns light looped back at the far end and thereby determine the fiber arrangement and/or the cable type of the multi-fiber array cable.

    MULTIPLE-ACQUISITION OTDR METHOD AND DEVICE
    9.
    发明申请
    MULTIPLE-ACQUISITION OTDR METHOD AND DEVICE 有权

    公开(公告)号：US20170149496A1

    公开(公告)日：2017-05-25

    申请号：US15427486

    申请日：2017-02-08

    Applicant: EXFO INC.

    Inventor： Stéphane Perron ,  Michel Leblanc

    IPC: H04B10/071 ,  G01M11/00

    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.

    System, a wavelength isolator and methods therein for supervision of a passive optical network
    10.
    发明授权
    System, a wavelength isolator and methods therein for supervision of a passive optical network 有权
    系统，波长隔离器及其中用于无源光网络监控的方法

    公开(公告)号：US09344189B2

    公开(公告)日：2016-05-17

    申请号：US14384612

    申请日：2012-03-20

    Applicant: Giancarlo Vilela de Faria ,  Guilherme Penello Temporao ,  Jean Pierre Von der Weid

    Inventor： Giancarlo Vilela de Faria ,  Guilherme Penello Temporao ,  Jean Pierre Von der Weid

    IPC: H04B10/08 ,  H04B10/071 ,  H04B10/272 ,  G01M11/00

    CPC classification number: H04B10/071 ,  G01M11/3127 ,  G01M11/3136 ,  H04B10/272 ,  H04Q2213/1301

    Abstract: A system for supervision of a passive optical network includes an OTDR device, generating N+1 OTDR signals of wavelengths λU-λN, and transmitting the signals towards ONUs. The system includes a splitter having N output branches. An input of the splitter is connected to the output of the OTDR device and the output branches of the splitter are indirectly connected to the ONUs. The splitter splits the OTDR signals and forwards them towards the ONUs. The system includes a wavelength isolator having inputs connected to the splitter output branches. The wavelength isolator isolates, on individual inputs, one predetermined wavelength of the received OTDR signals per individual input, where two inputs of the wavelength isolator do not isolate the same wavelength, and forwards, from each of the inputs of the wavelength isolator, the OTDR signals to associated outputs towards the ONUs connected to the wavelength isolator by individual fiber links.

    Abstract translation: 无源光网络监控系统包括OTDR设备，产生波长λU-λN的N + 1个OTDR信号，并向ONU发送信号。 该系统包括具有N个输出分支的分配器。 分离器的输入端连接到OTDR设备的输出端，分离器的输出分支间接连接到ONU。 分路器分离OTDR信号并将其转发给ONU。 该系统包括具有连接到分路器输出分支的输入的波长隔离器。 波长隔离器在各个输入端隔离每个单独输入的接收的OTDR信号的一个预定波长，其中波长隔离器的两个输入不隔离相同的波长，并且从波长隔离器的每个输入端向前传输OTDR 通过各个光纤链路将信号发送到连接到波长隔离器的ONU的相关输出。

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