Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 19, Issue 21-24, Pages 1928-1930Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2007.908772
Keywords
Brillouin scattering; correlation; distributed detection; modulation; nonlinear optics; optical fiber measurements
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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.
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