Publication

Time/frequency coding for Brillouin distributed sensors

Luc Thévenaz
2012
Conference Papers

Abstract

In this paper, we propose a novel coding for long range Brillouin Optical Time Analysis (BOTDA) distributed sensors based on a combination of time and frequency pulses, resulting in an additional coding gain of √2 with respect to traditional intensity-modulated codes. The generation of frequency-chirped pseudo-arbitrary pulses in return-to-zero (RZ) format with a Direct-Digital Synthesizer (DDS) is presented and the coding gain is experimentally verified, perfectly matching its theoretical value.

Official source

https://infoscience.epfl.ch/entities/publication/6fd29460-112f-4b36-8002-d576092f1447

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Time/frequency coding for Brillouin distributed sensors

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