Title:
DEVICE AND METHOD FOR EVALUATING BIDIRECTIONAL CROSSTALK
Document Type and Number:
WIPO Patent Application WO/2024/038487
Kind Code:
A1
Abstract:
The purpose of the present disclosure is to enable evaluation of bidirectional crosstalk in an uncoupled multicore fiber transmission line, even in a case where intercore crosstalk is minimal. The present disclosure is a device that uses a loss distribution of first backward scattered light from a first core and/or a loss distribution of second backward scattered light from a second core to detect each point of loss in a tested optical fiber, calculate a mode coupling matrix Tｉ of an ith point of loss of the tested optical fiber, and calculate a fiber length Lｉ of an ith fiber section isolated at the ith point of loss of the tested optical fiber, and that uses the mode coupling matrix Tｉ and the fiber length Lｉ thus calculated, and a fiber loss coefficient α and a power coupling coefficient h of the tested optical fiber, which are measured beforehand, to calculate bidirectional crosstalk in the first core or the second core.
Inventors:
NAKAMURA ATSUSHI (JP)
KOSHIKIYA YUSUKE (JP)
KOSHIKIYA YUSUKE (JP)
Application Number:
PCT/JP2022/030887
Publication Date:
February 22, 2024
Filing Date:
August 15, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01M11/02
Foreign References:
| CN111555803A | 2020-08-18 | |||
| JP2022085974A | 2022-06-09 | |||
| JP2015230263A | 2015-12-21 |
Other References:
TOMOKAZU ODA, ATSUSHI NAKAMURA, YUSUKE KOSHIKIYA : "Crosstalk test method when constructing a non-coupled MCF transmission line", IEICE TECHNICAL REPORT, OFT, IEICE, JP, vol. 121, no. 376 (OFT2021-78), 17 February 2022 (2022-02-17), JP, pages 43 - 48, XP009552875
Attorney, Agent or Firm:
OKADA, Kenji et al. (JP)
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