Chaos Raman distributed optical fiber sensing  

作　　者：Chenyi Wang Jian Li Xinxin Zhou Zijia Cheng Lijun Qiao Xiaohui Xue Mingjiang Zhang 

机构地区：[1]College of Physics,Taiyuan University of Technology,Taiyuan 030024 Shanxi,China [2]Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024 Shanxi,China [3]College of Electrical Information and Optical Engineering,Taiyuan University of Technology,Taiyuan,030024,Shanxi,China [4]Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan 030032 Shanxi,China

出　　处：《Light(Science & Applications)》2023年第10期2105-2121,共17页光（科学与应用)（英文版）

基　　金：Supported by National Natural Science Foundation of China(NSFC)under Grants(62075151,62205234,62105234);National Key Research and Development Program of China(2022YFA1404201);Supported by Fundamental Research Program of Shanxi Province(202103021223042);Supported by Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi;Supported by Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering.

摘　　要：The physics principle of pulse flight positioning is the main theoretical bottleneck that restricts the spatial resolution of the existing Raman distributed optical fiber sensing scheme.Owing to the pulse width of tens of nanoseconds,the spatial resolution of the existing Raman distributed optical fiber sensing scheme with kilometer-level sensing distance is limited to the meter level,which seriously restricts the development of the optical time-domain reflection system.In this paper,a chaos laser is proposed in the context of the physical principle of the Raman scattering effect,and a novel theory of chaos Raman distributed optical fiber sensing scheme is presented.The scheme reveals the characteristics of chaos Raman scattering light excited by a chaotic signal on the sensing fiber.Further,the chaos time-domain compression demodulation mechanism between the temperature variation information and chaos correlation peak is demonstrated.Then,the position of the temperature variation signal is precisely located using the delay time of the chaos correlation peak combined with the chaos pulse flight time.Based on this novel optical sensing mechanism,an experiment with 10 cm spatial resolution and 1.4 km sensing distance was conducted,and the spatial resolution was found to be independent of the sensing distance.Within the limit of the existing spatial resolution theory,the spatial resolution of the proposed scheme is 50 times higher than that of the traditional scheme.The scheme also provides a new research direction for optical chaos and optical fiber sensing.

关 键 词：FIBER OPTICAL SCATTERING 

分 类 号：TN2[电子电信—物理电子学]