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Title: Multi-point dynamic strain sensing using external modulation-based brillouin optical correlation domain analysis
Authors: Somepalli, B 
Venkitesh, D
Lu, C 
Srinivasan, B
Issue Date: 2019
Publisher: Optical Society of America
Source: Optics express, 8 July 2019, v. 27, no. 14, p. 19486-19502 How to cite?
Journal: Optics express 
Abstract: We report a novel technique to detect dynamic strain variations simultaneously at multiple locations. Our technique is based on Brillouin optical correlation domain analysis implemented through external modulation to generate multiple independently-accessible correlation peaks within the sensing fiber. Experiments are carried out to demonstrate the precise determination of Brillouin frequency shift (BFS) from multiple locations independently. As a proof of principle, two correlation peaks are generated within a 1 km long fiber and their independent tunability is verified experimentally by mapping the spatial profile of the two correlations. We also experimentally demonstrate the detection of dynamic strain variations at two locations simultaneously, each with a spatial resolution of 60 cm over 100 m long fiber.
EISSN: 1094-4087
DOI: 10.1364/OE.27.019486
Rights: © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (
Journal © 2019
The following publication B. Somepalli, D. Venkitesh, C. Lu, and B. Srinivasan, "Multi-point dynamic strain sensing using external modulation-based Brillouin optical correlation domain analysis," Opt. Express 27, 19486-19502 (2019) is available at
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