Title :
Distributed Fiber Strain Sensor With 1-kHz Sampling Rate Based on Brillouin Optical Correlation Domain Analysis
Author :
Song, Kwang Yong ; Hotate, Kazuo
Author_Institution :
Chung-Ang Univ., Seoul
Abstract :
We report the highest speed distributed sensing of dynamic strain based on stimulated Brillouin scattering in optical fibers. A sampling rate of 1 kHz, more than an order of magnitude higher than the former best result, is achieved by applying a simplified Brillouin optical correlation domain analysis with optimized time gates and an unbalanced Mach-Zehnder delay line. In experiments, we present the measurement of various dynamic strains at the maximum frequency of 200 Hz with 10-cm spatial resolution and 20-m measurement range.
Keywords :
distributed sensors; fibre optic sensors; optical correlation; stimulated Brillouin scattering; strain sensors; 1-kHz sampling rate; Brillouin optical correlation domain analysis; Mach-Zehnder delay line; distributed fiber strain sensor; dynamic strains; optical fibers; Brillouin scattering; Capacitive sensors; Fiber nonlinear optics; Frequency measurement; Optical fiber sensors; Optical fibers; Optical scattering; Optical sensors; Sampling methods; Stimulated emission; Brillouin scattering; correlation; distributed detection; modulation; nonlinear optics; optical fiber measurements;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.908772
