High performance Raman distributed high-temperature sensing system based on sapphire fiber

Ruimin Jie; Xu Liu; Bo Liu; Yunjiang Rao

doi:10.1117/12.2669081

21 March 2023 High performance Raman distributed high-temperature sensing system based on sapphire fiber

Ruimin Jie, Xu Liu, Bo Liu, Yunjiang Rao

Proceedings Volume 12595, Advanced Fiber Laser Conference (AFL2022); 125952A (2023) https://doi.org/10.1117/12.2669081
Event: Advanced Fiber Laser Conference (AFL2022), 2022, Changsha, China

Abstract

Distributed High-Temperature Sensing (DHTS) system with Single Crystal Fiber (SCF) has been proved to be an efficient method for ultra-high temperature sensing where traditional silica fiber can’t survive. The performance enhancement of the system has been a long desire to better support various applications. In this paper, the upgraded DHTS system used 532 nm laser to avoid thermo-noise at ultra-high temperature and detected the backscattered Raman Stokes and Anti-Stokes signals in a sapphire fiber. The measurands indicated a 7 cm spatial resolution and a 2.2 ℃ temperature resolution with only 30 s average time. The system is expected to be applicable for important applications such as aircraft engine and energy monitoring with further improvements.

Citation Download Citation

Ruimin Jie, Xu Liu, Bo Liu, and Yunjiang Rao "High performance Raman distributed high-temperature sensing system based on sapphire fiber", Proc. SPIE 12595, Advanced Fiber Laser Conference (AFL2022), 125952A (21 March 2023); https://doi.org/10.1117/12.2669081

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