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Abstract

Engineering

Optimizing Brillouin Optical Time-Domain Analyzers Based on Gain Spectrum Engineering

Published: May 11th, 2020

DOI:

10.3791/61115

1THz-Photonics Group, Technische Universität Braunschweig

Abstract

Demonstrated is a unique method for sensing performance enhancement in Brillouin optical time-domain analyzers (BOTDA). A Brillouin gain spectrum (BGS) is superimposed with two symmetric Brillouin loss spectra (BLS). This leads to a complex engineered spectrum shape that is more resistant to the sensing system noise. Instead of only one pump and probe interaction as in the conventional BOTDA setup, three optical probe waves are exploited, with one probe located in the BGS and the other two symmetrically in the BLS. Due to the resistance and insensitivity of the engineered spectrum shape to the noise, the sensing performance is enhanced by 60% and the measurand resolution is doubled.

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Keywords Brillouin Optical Time domain Analyzer

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