Article: Optical fibre distributed sensing system based on high-power ultra-narrow linewidth laser Journal: International Journal of Energy Technology and Policy (IJETP) 2025 Vol.20 No.6 pp.17 - 32 Abstract: This study aims to explore the fibre distributed sensing system based on high-power ultra-narrow linewidth single-mode fibre lasers to achieve monitoring and protection of important areas such as borders, military restricted areas, power plants, nuclear power plants, prisons, etc. The study uses ultra-narrow linewidth single-mode fibre lasers as light sources, and uses the OTDR interference mechanism to interfere with the Rayleigh scattered light of each part of the optical cable to achieve sensing. The test results show that the maximum deviation between the transmission length and the centre length of the light source in each band does not exceed 0.06 nm, and the centre length offset of the two measurements is less than 0.01 nm. The system has good safety performance, high sensitivity, a wide range of applications and low cost advantages, and can complete precise measurements. Inderscience Publishers - linking academia, business and industry through research

Title: Optical fibre distributed sensing system based on high-power ultra-narrow linewidth laser

Authors: Long Li; Mingyue Liu; Qingtao Wu; Xinpeng Zhang; Zhankun Liu; Yulun Zhang

Addresses: Power Dispatch Control Center, State Grid Heilongjiang Power Company Limited, Harbin 150000, Heilongjiang, China ' Information Communication Dispatch Monitoring Center (Communication Center), State Grid Heilongjiang Power Company Limited Information and Communication Company, Harbin 150000, Heilongjiang, China ' Information and Communication Branch (Data Center), State Grid Heilongjiang Power Company Limited Daqing Power Supply Company, Daqing 163453, Heilongjiang, China ' Operation and Maintenance Department, State Grid Heilongjiang Power Company Limited Harbin Power Supply Company, Harbin 150000, Heilongjiang, China ' Operation and Maintenance Department, State Grid Heilongjiang Power Company Limited Harbin Power Supply Company, Harbin 150000, Heilongjiang, China ' Information Communication Dispatch Monitoring Center (Communication Center), State Grid Heilongjiang Power Company Limited Information and Communication Company, Harbin 150000, Heilongjiang, China

Abstract: This study aims to explore the fibre distributed sensing system based on high-power ultra-narrow linewidth single-mode fibre lasers to achieve monitoring and protection of important areas such as borders, military restricted areas, power plants, nuclear power plants, prisons, etc. The study uses ultra-narrow linewidth single-mode fibre lasers as light sources, and uses the OTDR interference mechanism to interfere with the Rayleigh scattered light of each part of the optical cable to achieve sensing. The test results show that the maximum deviation between the transmission length and the centre length of the light source in each band does not exceed 0.06 nm, and the centre length offset of the two measurements is less than 0.01 nm. The system has good safety performance, high sensitivity, a wide range of applications and low cost advantages, and can complete precise measurements.

Keywords: optical fibre distributed sensing system; fibre laser; high power; ultra-narrow linewidth.

DOI: 10.1504/IJETP.2025.149449

International Journal of Energy Technology and Policy, 2025 Vol.20 No.6, pp.17 - 32

Received: 11 Dec 2024
Accepted: 26 May 2025
Published online: 31 Oct 2025 *

Title: Optical fibre distributed sensing system based on high-power ultra-narrow linewidth laser

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