Title:
OPTICAL FIBER ROUTE SEARCH METHOD, OPTICAL FIBER ROUTE SEARCH DEVICE AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2020/158438
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an optical fiber route search method, an optical fiber route search device, and a program that make it possible to effectively confirm the path of an optical fiber wired over a long distance or a wide range. This optical fiber route search method comprises: performing an optical measurement for measuring the state of an optical fiber in a distributed manner while providing disturbance to the optical fiber at a parallel, branch, or intersection part (proximity part) of optical fiber wiring; and determining, from a distribution chart obtained by the optical measurement, a location where the number of singular points (peaks and intensity fluctuations) fluctuates (becomes plural) as the location of the proximity part.
Inventors:
IIDA DAISUKE (JP)
HONDA NAZUKI (JP)
OKAMOTO TATSUYA (JP)
WAKISAKA YOSHIFUMI (JP)
OSHIDA HIROYUKI (JP)
HONDA NAZUKI (JP)
OKAMOTO TATSUYA (JP)
WAKISAKA YOSHIFUMI (JP)
OSHIDA HIROYUKI (JP)
Application Number:
PCT/JP2020/001425
Publication Date:
August 06, 2020
Filing Date:
January 17, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B10/071
Foreign References:
| JP2018194372A | 2018-12-06 | |||
| JP2004212325A | 2004-07-29 | |||
| JPH10177055A | 1998-06-30 |
Other References:
D. IIDA ET AL.: "Distributed measurement of acoustic vibration location with frequency multiplexed phase-OTDR", OPTICAL FIBER TECHNOL., vol. 36, 2017, pages 19 - 25, XP085114643, DOI: 10.1016/j.yofte.2017.02.005
See also references of EP 3920435A4
See also references of EP 3920435A4
Attorney, Agent or Firm:
OKADA, Kenji et al. (JP)
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