Title:
DISTRIBUTED FIBER RAMAN TEMPERATURE-MEASURING APPARATUS AND METHOD BASED ON ASE NOISE
Document Type and Number:
WIPO Patent Application WO/2019/218690
Kind Code:
A1
Abstract:
A distributed fiber Raman temperature-measuring apparatus and method based on ASE noise. The apparatus comprises an ASE noise light source (1), a first tunable optical filter (2), a first 1×2 fiber coupler (3), a photodetector (4), an optical circulator (5), a second 1×2 fiber coupler (6), a second tunable optical filter (7), a first avalanche photodetector (8), a first low-noise amplifier (9), a third tunable optical filter (10), a second avalanche photodetector (11), a second low-noise amplifier (12), a data collection card (13), a computer (14) and a sensing fiber (15). The apparatus and method solve the conflict between a spatial resolution and a measurement distance present in existing distributed fiber Raman temperature-measuring systems based on pulse light, and overcome the problem of system performance reduction brought about by a chaotic laser serving as a sensing signal itself in distributed fiber Raman temperature-measuring systems based on a chaotic laser.
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Inventors:
ZHANG JIANZHONG (CN)
FENG CHANGKUN (CN)
ZHANG MINGJIANG (CN)
LI MENGWEN (CN)
LI JIAN (CN)
QIAO LIJUN (CN)
FENG CHANGKUN (CN)
ZHANG MINGJIANG (CN)
LI MENGWEN (CN)
LI JIAN (CN)
QIAO LIJUN (CN)
Application Number:
PCT/CN2019/000080
Publication Date:
November 21, 2019
Filing Date:
April 29, 2019
Export Citation:
Assignee:
UNIV TAIYUAN TECHNOLOGY (CN)
International Classes:
G01K11/32; G01K1/14
Foreign References:
| CN108760080A | 2018-11-06 | |||
| CN107664541A | 2018-02-06 | |||
| CN105136179A | 2015-12-09 | |||
| CN105784195A | 2016-07-20 | |||
| CN105043586A | 2015-11-11 | |||
| CN102680138A | 2012-09-19 | |||
| US20110310925A1 | 2011-12-22 |
Attorney, Agent or Firm:
TAIYUAN KEWEI PATENT OFFICE (GENERAL PARTNER) (CN)
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