公开(公告)号：US20180076890A1

公开(公告)日：2018-03-15

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: H04B10/079 ,  H04J14/02 ,  H04B10/27 ,  H04B10/67 ,  H04B10/077

CPC classification number: H04J14/02 ,  H04B10/07955 ,  H04J14/0221

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：US20190305845A1

公开(公告)日：2019-10-03

申请号：US16445992

申请日：2019-06-19

Applicant: EXFO Inc.

Inventor： Normand CYR ,  Gang HE ,  Bernard RUCHET

IPC: H04B10/079

Abstract: Method and systems for characterizing an optical signal propagating along a communication link are disclosed. The signal includes a data-carrying signal contribution, modulated at a symbol frequency, and a noise contribution. The method includes measuring an optical power spectrum of the signal, which includes a data-carrying signal spectrum component and a noise spectrum component. The method also includes determining a measured spectral correlation function within pairs of spectral components of the signal as a function of center frequency of the pairs, the spectral components in each pair being spectrally separated from each other by the symbol frequency. The method further includes obtaining a solution for the data-carrying signal spectrum component based on the measured optical power spectrum, such that a calculated spectral correlation function based on the solution matches the measured spectral correlation function. In some embodiments, the spectral correlation function is measured as a low-frequency beatnote amplitude function.

公开(公告)号：US20190245641A1

公开(公告)日：2019-08-08

申请号：US16388367

申请日：2019-04-18

Applicant: EXFO Inc.

Inventor： Bernard RUCHET ,  Mario L'HEUREUX ,  Daniel GARIEPY ,  Etienne MORIN-DROUIN

IPC: H04J14/02 ,  H04B10/079

CPC classification number: H04J14/02 ,  H04B10/07955 ,  H04J14/0221

Abstract: A device and method for optical power measurement in an optical network supporting upstream and downstream signal propagation along an optical transmission path. An upstream wavelength analyzer receives upstream light extracted from the optical transmission path and is configured to determine an upstream spectral characteristic of the extracted upstream light. A downstream optical power meter assembly receives downstream light extracted from the optical transmission path and is configured to measure an optical power parameter of a downstream signal. A processing unit is configured to determine, based on the upstream spectral characteristic, at least one pass/fail threshold associated with the measured optical power parameter of the downstream signal.

公开(公告)号：US20170085318A1

公开(公告)日：2017-03-23

申请号：US15263986

申请日：2016-09-13

Applicant: EXFO INC.

Inventor： Bernard RUCHET ,  Mario L'HEUREUX ,  Daniel GARIEPY

IPC: H04B10/079 ,  H04J14/02 ,  H04B10/27

CPC classification number: H04B10/07955 ,  H04B10/079 ,  H04B10/27 ,  H04J14/0221

Abstract: 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.

公开(公告)号：US20170003195A1

公开(公告)日：2017-01-05

申请号：US15193180

申请日：2016-06-27

Applicant: EXFO INC.

Inventor： Denis LAFRANCE ,  Bernard RUCHET ,  Robert BARIBAULT

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

CPC classification number: G01M11/30 ,  G02B6/385 ,  G02B6/3885 ,  G02B21/0016 ,  G06T7/0004 ,  G06T2207/10056 ,  H04B10/12 ,  H04N5/2251 ,  H04N2005/2255

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.

Abstract translation: 提供了一种用于检查多光纤连接器的检查系统。 检查系统包括显微镜探针和探针尖端，其构造成在显微镜探针和多光纤连接器之间提供光路。 探针头和显微镜探针被配置成使得显微镜探针的视野足够大以覆盖包围多个光纤端面的连接器表面的一部分。 该系统还包括一个移动机构，可操作以将显微镜探针的视场在连接器表面上的至少两个离散位置之间移动。 每个离散位置包括多个光纤端面的不同子集以及可选地至少一个定位参考。 还提供探针尖端和检查方法。