Summary
2023
Session Number:C1L-4
Session:
Number:C1L-41
Chaos Distributed Fiber Sensing
Zhang Mingjiang, Wang Yahui, Li Jian, Zhang Jianzhong, Qiao Lijun,
pp.427-430
Publication Date:2023-09-21
Online ISSN:2188-5079
Summary:
Chaos distributed fiber sensing technology has been reported with the significant advantage of decoupling between the spatial resolution and sensing range for achieving a larger number of resolving points and ultra-high spatial resolution. The utilization of chaotic laser ensures a sole narrow correlation peak existing within the entire fiber, whose width only depends on chaos bandwidth, and then a high resolution that does not deteriorate with the distance increasing can be obtained theoretically. This paper proposes and experimentally demonstrates a long-range chaotic Brillouin optical correlation domain analysis (BOCDA) by employing an optimized time-gated configuration and differential denoising scheme, where the number of effective resolving points is largely increased to more than 1 million. In addition, a novel theory of chaos Raman distributed optical fiber sensing scheme is presented. An experiment with a 10 cm spatial resolution and 1.4 km sensing distance was conducted, and the spatial resolution is 50 times higher than that of the traditional scheme and found to be independent of the sensing distance.