Title:
DEVICE AND METHOD FOR MEASURING LOSS AND CROSSTALK PRODUCED IN OPTICAL FIBER TRANSMISSION LINE
Document Type and Number:
WIPO Patent Application WO/2023/053250
Kind Code:
A1
Abstract:
An objective of the present disclosure is to provide a measurement device which independently measures loss and crosstalk produced in multiple locations of optical fiber along which a plurality of modes are propagated, and a method for measuring the same. The present disclosure is provided with a light incident unit which causes frequency-swept probe light to be incident on one end of an optical fiber to be measured and pump light to be incident, for the probe light, on the other end of the optical fiber to be measured, thereby amplifying the probe light in the optical fiber to be measured; a light receiving unit which receives multiplexed light in which local light has been multiplexed with the probe light; an interference waveform measurement unit which measures the interference waveform of the probe light and the local light; a base mode time waveform analysis unit which acquires a base mode time waveform of the probe light on the basis of the interference waveform; and a control computation unit which calculates loss and crosstalk locations where loss and crosstalk are produced in the optical fiber to be measured on the basis of the base mode time waveform.
More Like This:
Inventors:
ODA TOMOKAZU (JP)
NAKAMURA ATSUSHI (JP)
KOSHIKIYA YUSUKE (JP)
NAKAMURA ATSUSHI (JP)
KOSHIKIYA YUSUKE (JP)
Application Number:
PCT/JP2021/035787
Publication Date:
April 06, 2023
Filing Date:
September 29, 2021
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01M11/02
Domestic Patent References:
| WO2020250310A1 | 2020-12-17 | |||
| WO2021070319A1 | 2021-04-15 |
Foreign References:
| JP2011128040A | 2011-06-30 | |||
| JPH11160200A | 1999-06-18 | |||
| US20170346550A1 | 2017-11-30 | |||
| CN113049014A | 2021-06-29 |
Other References:
ODA T., NAKAMURA A., IIDA D., OSHIDA H.: "Measurement of modal attenuation and crosstalk in spliced few-mode fibres based on mode-resolved BOTDA", 45TH EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC 2019), INSTITUTION OF ENGINEERING AND TECHNOLOGY, 1 September 2019 (2019-09-01) - 26 September 2019 (2019-09-26), pages 336 - 336, XP093053159, ISBN: 978-1-83953-185-9, DOI: 10.1049/cp.2019.1070
Attorney, Agent or Firm:
OKADA, Kenji et al. (JP)
Download PDF:
Previous Patent: LEARNING DEVICE, ESTIMATION DEVICE, LEARNING METHOD, ESTIMATION METHOD, AND PROGRAM
Next Patent: LAMP SWITCH-ON CONTROL SYSTEM
Next Patent: LAMP SWITCH-ON CONTROL SYSTEM