Title:
OPTICAL FIBER SENSING SYSTEM, AND OPTICAL FIBER SENSING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/248298
Kind Code:
A1
Abstract:
The objective of the present disclosure is to enable optical fiber sensing based on measurement of backscattered light to be carried out with respect to an optical pathway that employs different optical fibers depending on a communication direction. The present disclosure provides an optical fiber sensing system comprising a pathway selection optical switch, an optical test device, and a first optical circulator inserted into an optical fiber being measured, wherein: if communication light is directed toward the pathway selection optical switch, the first optical circulator is used to input test light into the optical fiber being measured, and the pathway selection optical switch is used to separate backscattered light from a communication network; and if the communication light is exiting the pathway selection optical switch, the pathway selection optical switch is used to input the test light from the optical test device into the optical fiber being measured, and the first optical circulator is used to divide the backscattered light from the communication network.
Inventors:
IIDA DAISUKE (JP)
KITO CHIHIRO (JP)
KOSHIKIYA YUSUKE (JP)
KITO CHIHIRO (JP)
KOSHIKIYA YUSUKE (JP)
Application Number:
PCT/JP2022/024553
Publication Date:
December 28, 2023
Filing Date:
June 20, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01D5/353; G01M11/00; G02B6/00
Domestic Patent References:
| WO2021090644A1 | 2021-05-14 |
Foreign References:
| JPH0538551U | 1993-05-25 | |||
| JP2012089697A | 2012-05-10 |
Attorney, Agent or Firm:
OKADA, Kenji et al. (JP)
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