Title:
OPTICAL FIBER SENSING SYSTEM AND DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/216848
Kind Code:
A1
Abstract:
An optical fiber sensing receiving system and a detection method. The system comprises: a first signal generation unit (101), a second signal generation unit (102), a first signal modulation unit (103), a second signal modulation unit (104), a circulator unit (105) and a coherent detection unit (106), wherein the first signal modulation unit (103) is configured to modulate, according to a detection modulation signal that is generated by the second signal generation unit (102), a detection signal that is generated by the first signal generation unit (101), so as to generate a target detection signal; the second signal modulation unit (104) is configured to modulate, according to a local oscillation modulation signal that is generated by the second signal generation unit (102), a local oscillation signal that is generated by the first signal generation unit (101), so as to generate a target local oscillation signal that is negatively correlated with the power of a backscatter signal; the circulator unit (105) is configured to send the target detection signal and output the backscatter signal; and the coherent detection unit (106) is configured to realize coherent detection of the target local oscillation signal and the backscatter signal, so as to obtain sensing data.
Inventors:
CHEN WEIZHANG (CN)
QIAO YAOJUN (CN)
ZUO WEN (CN)
YANG XIAOWEN (CN)
QIAO YAOJUN (CN)
ZUO WEN (CN)
YANG XIAOWEN (CN)
Application Number:
PCT/CN2023/089881
Publication Date:
November 16, 2023
Filing Date:
April 21, 2023
Export Citation:
Assignee:
ZTE CORP (CN)
International Classes:
G01V8/24
Foreign References:
| CN111486881A | 2020-08-04 | |||
| CN102538985A | 2012-07-04 | |||
| CN107769858A | 2018-03-06 | |||
| CN110445009A | 2019-11-12 | |||
| CN110487308A | 2019-11-22 | |||
| CN113008281A | 2021-06-22 | |||
| US20210364385A1 | 2021-11-25 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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