Title:
BIPOLAR DIFFERENTIAL PHASE ENCODING ULTRA-HIGH SPATIAL RESOLUTION BRILLOUIN OPTICAL TIME DOMAIN REFLECTOMETER
Document Type and Number:
WIPO Patent Application WO/2021/134747
Kind Code:
A1
Abstract:
The present invention provides a bipolar differential phase encoding ultra-high spatial resolution Brillouin optical time domain reflectometer, comprising a narrow linewidth laser, a polarization-maintaining coupler, a differential encoder, a Mach-Zehnder modulator, an optical pulse amplifier, an optical circulator, a sensing optical fiber, an optical amplifier, a coherent photoelectric receiver, a sideband separator, and a result measurement module. By implementing the present invention, the spatial resolution of Brillouin scattering spectrum measurement can be effectively improved, and the measurement accuracy can be effectively improved by increasing the number of times of superposition averaging. In addition, the measurement performance can be effectively improved by directly using a bipolar encoding sequence.
Inventors:
CHENG LINGHAO (CN)
GUAN BAIOU (CN)
MA XIANGJIE (CN)
ZHU JINDING (CN)
GUAN BAIOU (CN)
MA XIANGJIE (CN)
ZHU JINDING (CN)
Application Number:
PCT/CN2020/070085
Publication Date:
July 08, 2021
Filing Date:
January 02, 2020
Export Citation:
Assignee:
UNIV JINAN (CN)
International Classes:
G01D5/353; G01K11/32
Foreign References:
| CN103196584A | 2013-07-10 | |||
| CN104266752A | 2015-01-07 | |||
| CN103148878A | 2013-06-12 | |||
| JP2010217029A | 2010-09-30 |
Other References:
LI WEI: "Brillouin Fiber Sensing Based on Lossless Separation of Stokes and anti-Stokes scattering", MASTER'S DISSERTATION OF JINAN UNIVERSITY, 1 January 2018 (2018-01-01), XP055827812
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
Download PDF: