Title:
DEMODULATION SYSTEM FOR OPTICAL FIBER FABRY‑PEROT SENSOR
Document Type and Number:
WIPO Patent Application WO/2023/159395
Kind Code:
A1
Abstract:
A demodulation system for an optical fiber Fabry‑Perot sensor, comprising: a light source (1); a Fabry-Perot sensor (3); a coupler (2); a first optical component (4) configured to shape interference light into a linear first interference fringe pattern; a second optical assembly (4') configured to form a second interference fringe pattern on the basis of the linear first interference fringe pattern; a first detector (10) provided in an optical path downstream of the second optical assembly (4') and configured to receive a first optical signal to form a first optical signal curve; a second detector (11) provided in the optical path downstream of the second optical assembly (4') and configured to receive a second optical signal to form a second optical signal curve; a data collection device (12) configured to receive the first optical signal curve from the first detector (10) to generate a first light intensity curve, and receive the second light signal curve from the second detector (11) to generate a second light intensity curve; and a processor (13) configured to calculate a cavity length variation of the Fabry-Perot sensor (3) on the basis of the first light intensity curve and the second light intensity curve.
Inventors:
QIAO MENG (CN)
ZHANG LIZHE (CN)
LUO YUQING (CN)
ZHANG LIZHE (CN)
LUO YUQING (CN)
Application Number:
PCT/CN2022/077481
Publication Date:
August 31, 2023
Filing Date:
February 23, 2022
Export Citation:
Assignee:
BEIJING BYWAVE SENSING TECH CO LTD (CN)
International Classes:
G01H9/00; G01L9/00
Foreign References:
| CN105466621A | 2016-04-06 | |||
| CN207882443U | 2018-09-18 | |||
| CN101603857A | 2009-12-16 | |||
| CN103759748A | 2014-04-30 | |||
| CN101055243A | 2007-10-17 | |||
| CN101620357A | 2010-01-06 | |||
| US6901176B2 | 2005-05-31 |
Attorney, Agent or Firm:
LIU, SHEN & ASSOCIATES (CN)
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