公开(公告)号：US20160164601A1

公开(公告)日：2016-06-09

申请号：US14941759

申请日：2015-11-16

Applicant: EXFO INC.

Inventor： Stephane Perron

IPC: H04B10/079

CPC classification number: H04B10/07955 ,  G01M11/33

Abstract: The computer readable memory has recorded thereon instruction code for execution by a computing device for use with an optical power loss measurement (OPLM) system. The instruction code generally comprises: code for displaying a first set of instructions including measuring a first power value of test light outputted from a first reference optical waveguide; code for displaying a second set of instructions including measuring a second power value of test light outputted from a reference waveguide link including the first reference optical waveguide connected in series to a second reference optical waveguide; code for displaying a third set of instructions including measuring a reference power value of the OPLM system resulting from the propagation of light from via the reference waveguide link; and code for determining a corrected reference power value based on the reference power value and on the first and second power values.

Abstract translation: 计算机可读存储器中记录有用于由光功率损耗测量（OPLM）系统使用的计算设备执行的指令代码。 指令码通常包括：用于显示第一组指令的代码，包括测量从第一参考光波导输出的测试光的第一功率值; 用于显示第二组指令的代码，包括测量从包括与第二参考光波导串联连接的第一参考光波导的参考波导链路输出的测试光的第二功率值; 用于显示第三组指令的代码，包括测量由来自经由参考波导链路的光的传播产生的OPLM系统的参考功率值; 以及用于基于所述参考功率值以及所述第一和第二功率值来确定校正的参考功率值的代码。

公开(公告)号：US20150198503A1

公开(公告)日：2015-07-16

申请号：US14575409

申请日：2014-12-18

Applicant: EXFO INC.

Inventor： Michel Leblanc ,  Stéphane Perron

IPC: G01M11/00

CPC classification number: G01M11/31 ,  G01M11/3145 ,  G01M11/3172

Abstract: The reflectometric method for measuring an optical loss value of an optical fiber link generally comprises: obtaining at least one bias value being indicative of a bias induced by differing backscattering characteristics of a first optical fiber length and a second optical fiber length; propagating at least one test signal serially into the first optical fiber length, the optical fiber link and the second optical fiber length; monitoring at least one return signal resulting respectively from the propagation of the at least one test signal; and determining the optical loss value based on the at least one return signal and the at least one bias value.

Abstract translation: 用于测量光纤链路的光损耗值的反射测量方法通常包括：获得指示由第一光纤长度和第二光纤长度的不同后向散射特性引起的偏置的至少一个偏置值; 将至少一个测试信号串行地传播到第一光纤长度，光纤链路和第二光纤长度; 监测分别由所述至少一个测试信号的传播产生的至少一个返回信号; 以及基于所述至少一个返回信号和所述至少一个偏置值来确定所述光学损耗值。

公开(公告)号：US20140363157A1

公开(公告)日：2014-12-11

申请号：US14468890

申请日：2014-08-26

Applicant: EXFO Inc.

Inventor： Bernard Ruchet ,  Normand Cyr

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

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。

公开(公告)号：US20140328586A1

公开(公告)日：2014-11-06

申请号：US14268144

申请日：2014-05-02

Applicant: EXFO Inc.

Inventor： Gang HE ,  Daniel GARIEPY ,  Mats SKOLD

IPC: H04B10/079 ,  H04J14/06

CPC classification number: H04B10/07953 ,  H04J14/06

Abstract: There is provided a method and an apparatus for determining quality parameters on a polarization-multiplexed optical signal based on an analysis of the power spectral density of the Signal-Under-Test (SUT). The method is predicated upon knowledge of the spectral shape of the signal in the absence of significant noise or spectral deformation. This knowledge is provided by a reference optical spectrum trace. Based on this knowledge and under the assumption that ASE noise level is approximately constant in wavelength over a given spectral range, the spectral deformation of the signal contribution of the SUT may be estimated using a comparison of the spectral variations of the optical spectrum trace of the SUT with that of the reference optical spectrum trace.

Abstract translation: 提供了一种基于对测试信号（SUT）的功率谱密度的分析来确定偏振复用光信号质量参数的方法和装置。 该方法基于在没有显着噪声或光谱变形的情况下对信号的光谱形状的了解。 该知识由参考光谱轨迹提供。 基于这一知识，并假设ASE噪声水平在给定光谱范围内的波长近似恒定，则SUT的信号贡献的光谱变形可以使用光谱轨迹的光谱变化的比较来估计 SUT与参考光谱图谱相同。

公开(公告)号：USD713751S1

公开(公告)日：2014-09-23

申请号：US29460843

申请日：2013-07-16

Applicant: Exfo Inc.

Designer： Sebastien Nadeau

公开(公告)号：US20250123128A1

公开(公告)日：2025-04-17

申请号：US18891340

申请日：2024-09-20

Applicant: EXFO Inc.

Inventor： Vincent DEMERS-CARPENTIER ,  Eric THOMASSIN ,  Ines BAYOUDH EP BELGHITH ,  Rahma HAMMAMI

IPC: G01D5/353

Abstract: There is provided an OTDR method of assisting a user in finding a temporary event along an optical fiber link using an Optical Time Domain Reflectometer (OTDR). The method comprises: performing at least one OTDR acquisition toward the optical fiber link to obtain a baseline OTDR trace, wherein each OTDR acquisition is performed by propagating in the optical fiber link under test, a pulsed test signal and detecting corresponding return light from the optical fiber link so as to obtain an OTDR trace representing backscattered and reflected light as a function of distance in the optical fiber link; repeating OTDR acquisitions in real-time to obtain real-time OTDR traces; and for each new OTDR acquisition, comparing the corresponding real-time OTDR trace to the baseline OTDR trace to detect a temporary deformation of the OTDR trace using at least one of a difference between the baseline OTDR trace and the real-time OTDR trace and a derivative thereof, said temporary deformation being indicative of the presence of the temporary event along the optical fiber link.

公开(公告)号：USD1068515S1

公开(公告)日：2025-04-01

申请号：US29876965

申请日：2023-05-31

Applicant: EXFO INC.

Designer： Michael Simard

公开(公告)号：US20250078238A1

公开(公告)日：2025-03-06

申请号：US18813432

申请日：2024-08-23

Applicant: EXFO Inc.

Inventor： Jonathan PLANTE ,  Sylvain NADEAU ,  Justin M. WHATLEY

IPC: G06T7/00 ,  G01M11/00 ,  G06V10/24 ,  G06V10/26 ,  G06V10/764 ,  G06V10/774 ,  G06V10/82

Abstract: Systems and methods for inspecting optical fibers are provided. A method, according to one implementation, includes steps of obtaining an image of an end-face of an optical fiber; analyzing the image with a pre-trained neural network model to classify pixels therein as any of a defect, a scratch, or clean; aggregating the pixels based on proximity to obtain defect segments or scratch segments; characterizing these defect segments and scratch segments based on but not limited to size and location, and providing an output including any of the defect segments or scratch segments.

公开(公告)号：US11879802B2

公开(公告)日：2024-01-23

申请号：US17451397

申请日：2021-10-19

Applicant: EXFO Inc.

Inventor： Stephane Perron ,  Michel Leclerc ,  Pascal Gosselin-Badaroudine

IPC: G01M11/00 ,  H04B10/071

CPC classification number: G01M11/3154 ,  G01M11/3136 ,  H04B10/071

Abstract: There are provided methods and systems for testing the continuity of optical fiber links under test and/or a fiber arrangement, polarity or mapping of optical fiber connections within optical devices under test using the backscattering pattern as a signature. The device under test may comprises a single fiber, a duplex link, a multifiber cable or another multi-port device such as a backplane device.

公开(公告)号：US11726002B2

公开(公告)日：2023-08-15

申请号：US17303355

申请日：2021-05-27

Applicant: EXFO Inc.

Inventor： Michael Simard ,  Kristine Palanjyan ,  Stephane Perron

IPC: G01M11/08 ,  G01M11/00 ,  G02B6/38 ,  G01J1/02 ,  G01J1/04 ,  G02B6/42

CPC classification number: G01M11/086 ,  G01J1/0271 ,  G01J1/04 ,  G01M11/3136 ,  G01M11/3154 ,  G02B6/3825 ,  G02B6/3827 ,  G02B6/3893 ,  G02B6/3897 ,  G02B6/421

Abstract: An optical test instrument, in combination with a removable connector cartridge is provided. A method of replacing a damaged or worn optic fiber interface is also provided. The optical test instrument has casing having a cartridge receiving cavity therein with an inner end provided with a test instrument optical port; and an outer end provided with a cartridge receiving opening. The connector cartridge is sized and configured to be inserted in the cartridge receiving cavity. The connector cartridge has a cartridge inner end for facing the test instrument optical port when in use, and a cartridge outer end for receiving an optic fiber from a device under test (DUT). The connector cartridge houses a fiber optic cable extending between the cartridge inner end and the cartridge outer end. The connector cartridge is removably connectable to the instrument casing to allow replacement of the connector cartridge when the cartridge outer end is worn or damaged.