A novel signal restoration method in the frequency domain to enhance spatial resolution in distributed Brillouin sensing

Nils Nöther; Philipp Lenke; Katerina Krebber

doi:10.1117/12.835381

5 October 2009 A novel signal restoration method in the frequency domain to enhance spatial resolution in distributed Brillouin sensing

Nils Nöther, Philipp Lenke, Katerina Krebber

Author Affiliations +

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75032F (2009) https://doi.org/10.1117/12.835381
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

This article demonstrates how spatial resolution of distributed Brillouin sensing systems can be significantly enhanced by measuring the spatially resolved Brillouin gain spectra of an optical fiber in the frequency domain. We employ a novel signal processing method to overcome the known problem of spectral broadening that occurs at centimeter-range spatial resolutions. The method is based on an analytical description of stimulated Brillouin scattering in optical fibers for the case of harmonically modulated optical signals. From this analysis, the artifacts that degrade the measurement resolution were modeled; for the first time to our knowledge, undegraded gain spectra could be restored by means of deconvolution techniques adopted from digital image processing.

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Nils Nöther, Philipp Lenke, and Katerina Krebber "A novel signal restoration method in the frequency domain to enhance spatial resolution in distributed Brillouin sensing", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75032F (5 October 2009); https://doi.org/10.1117/12.835381

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