重庆理工大学学报2024，Vol.38Issue(11)：267-273,7.DOI:10.3969/j.issn.1674-8425(z).2024.06.034
基于拉曼放大的长距离BOTDR传感系统研究
Research on long-distance BOTDR sensing system based on Raman amplification
摘要
Abstract
Brillouin optical time domain reflectometry (BOTDR ) system realizes fully distributed temperature and strain sensing along the sensing fiber.However,due to the fiber loss,Brillouin signal light is often submerged in noise after long-distance transmission,and the signal-to-noise ratio is extremely low.Through the gain effect of Raman pump on the whole Brillouin signal of optical fiber,this paper investigates the difference of system measurement distance before and after Raman amplification. Moreover,the corresponding amplification curves under different pump powers are compared. Our experiments show the measurement distance of the BOTDR sensing system based on Raman amplification rises to the order of 100 km,and the temperature at the end of the fiber at 103 km is successfully measured at a spatial resolution of 50 m,and the measurement accuracy of 2.19 ℃ is obtained.关键词
光纤光学/布里渊散射/分布式传感/拉曼放大Key words
fiber optics/Brillouin scattering/distributed sensing/Raman amplification分类
信息技术与安全科学引用本文复制引用
范敏,尹国路,张明红,朱阳,赵航航,郑扬亮,张礼昌,石延辉,李玉华,袁孝红..基于拉曼放大的长距离BOTDR传感系统研究[J].重庆理工大学学报,2024,38(11):267-273,7.基金项目
中国南方电网有限责任公司超高压输电公司科技项目(010100KK52222006) （010100KK52222006）
