Author:
Otsubo Kenta,Zhu Guangtao,Kiyozumi Takaki,Noda Kohei,Nakamura Kentaro,Lee Heeyoung,Mizuno Yosuke
Abstract
AbstractBrillouin optical correlation-domain analysis (BOCDA) utilizing low-coherence light sources offers high-resolution distributed strain and temperature sensing. However, conventional BOCDA requires dual-end injection of pump and probe light into the sensing fiber. To overcome this limitation, low-coherence Brillouin optical correlation-domain reflectometry (BOCDR) based on spontaneous Brillouin scattering has emerged, enabling single-end light injection. While a pilot demonstration has shown a spatial resolution of 19 cm, a comparison of its measurement accuracy with standard BOCDR systems is yet to be explored. This study presents a distributed measurement with ~ 3 cm spatial resolution and demonstrates that low-coherence BOCDR eliminates systematic errors caused by direct sinusoidal modulation, offering enhanced measurement precision.
Funder
Japan Society for the Promotion of Science
Yazaki Memorial Foundation for Science and Technology
Takahashi Industrial and Economic Research Foundation
Konica Minolta Imaging Science Foundation
Publisher
Springer Science and Business Media LLC
Reference34 articles.
1. Agrawal, G. P. Nonlinear Fiber Optics (Academic Press, 2019).
2. Horiguchi, T. & Tateda, M. BOTDA-nondestructive measurement of single-mode optical fiber attenuation characteristics using Brillouin interaction: Theory. J. Lightwave Technol. 7, 1170 (1989).
3. Kurashima, T., Horiguchi, T., Izumita, H., Furukawa, S. & Koyamada, Y. Brillouin optical-fiber time domain reflectometry. IEICE Trans. Commun. E76-B, 382 (1993).
4. Wang, Y., Chen, L. & Bao, X. Single-shot chirped pulse BOTDA for static and dynamic strain sensing. Opt. Lett. 46, 5774 (2021).
5. Soto, M. A., Yang, Z., Ramírez, J. A., Zaslawski, S. & Thévenaz, L. Evaluating measurement uncertainty in Brillouin distributed optical fibre sensors using image denoising. Nat. Commun. 12, 4901 (2021).