Brillouin Scattering Spectrum Analysis Based on Auto-Regressive Spectral Estimation

• DOI: 10.1007/s13320-018-0488-7
• Publication Date: 2018-03-19T03:46:36Z
• Authors: Mengyun Huang; Wei Li; Zhangyun Liu; Linghao Cheng; Bai-Ou Guan
• Keywords: distributed fiber-optic sensing; 0202 electrical engineering, electronic engineering, information engineering; Applied optics. Photonics; 02 engineering and technology; Brillouin optical time-domain reflectometry (BOTDR); auto-regressive (AR) model; spectral estimation; TA1501-1820

Abstract Auto-regressive (AR) spectral estimation technology is proposed to analyze the Brillouin scattering spectrum in Brillouin optical time-domain refelectometry. It shows that AR based method can reliably estimate the Brillouin frequency shift with an accuracy much better than fast Fourier transform (FFT) based methods provided the data length is not too short. It enables about 3 times improvement over FFT at a moderate spatial resolution.