Proof-of-concept demonstration of high-speed dual-laser Brillouin optical correlation-domain reflectometry
Abstract
Abstract We develop a dual-laser Brillouin optical correlation-domain reflectometry configuration for high-speed distributed strain measurement. High-speed Brillouin gain spectrum (BGS) acquisition is achieved by optical frequency sweeping of an independently controlled reference laser, enabling time-domain BGS observation without frequency sweeping of an electrical spectrum analyzer. Distributed strain measurement is demonstrated along a 3.5 m long fiber under test. Strain is measured at 100 sensing points with a repetition rate of 10 Hz and a BGS acquisition rate of 1 kHz. The proposed method has no theoretical limitation on strain dynamic range and preserves constant spatial resolution while reducing system complexity.
Fields of Study & Subjects
Advanced Fiber Optic Sensors
Optical and Acousto-Optic Technologies
Photonic Crystal and Fiber Optics
Publication details
- Journal / source
- Japanese Journal of Applied Physics
- Volume
- 65
- Issue
- 4
- Pages
- 048003–048003
- Publication date
- 26 February 2026
- Language
- EN