传感技术学报2026，Vol.39Issue(2)：244-249,6.DOI:10.3969/j.issn.1004-1699.2026.02.003
基于多相位编码调制的相位敏感光时域反射计研究
Research on Phase-Sensitive Time Domain Reflectometer with Multivariate Phase Encoding Modulation
摘要
Abstract
To overcome the trade-off between long sensing distance and high spatial resolution in phase-sensitive optical time domain re-flectometry(Φ-OTDR),a multivariate phase encoding modulation Φ-OTDR is proposed.The discrete sampling process has been ana-lyzed and the modulation and demodulation control strategy has been designed.By leveraging the principles of pulse time domain com-pression,a match filter system has been constructed,which allows for adjusting encoding parameters to achieve enhancement of pulse compression performance.Experimental results demonstrate that,compared to conventional single-pulse modulation methods,the signal-to-noise ratio at the end of the 20.4 km optical fiber is significantly extended to from 10.3 dB to 43.5 dB at 3.8 m spatial resolution,and the signal-to-noise ratio at the end of the 95.6 km optical fiber can still reach 12.1 dB,and it is able to accurately locate the vibration position and achieve phase recovery.The proposed method realizes the long distance sensing the Φ-OTDR system under high space res-olution,providing new solution rhtought for further improving the sensing capability of Φ-OTDR.关键词
相位敏感光时域反射计/脉冲压缩/多相位编码/传感距离Key words
Φ-OTDR/pulse compression/multivariate phase encoding/sensing distance分类
信息技术与安全科学引用本文复制引用
陈娟,张红娟,王鹏飞,高妍,靳宝全..基于多相位编码调制的相位敏感光时域反射计研究[J].传感技术学报,2026,39(2):244-249,6.基金项目
国家自然科学基金项目(62375197) （62375197）
山西省重点研发计划项目(202102130501021) （202102130501021）
山西省基础研究计划项目(202103021222010) （202103021222010）
中央引导地方科技发展资金项目(YDZJSX20231B004) （YDZJSX20231B004）
