Time/frequency coding for Brillouin distributed sensors

Sébastien Le Floch; Florian Sauser; Marcelo A. Soto; Luc Thévenaz

doi:10.1117/12.975001

17 October 2012 Time/frequency coding for Brillouin distributed sensors

Sébastien Le Floch, Florian Sauser, Marcelo A. Soto, Luc Thévenaz

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84211J (2012) https://doi.org/10.1117/12.975001
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

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.

Citation Download Citation

Sébastien Le Floch, Florian Sauser, Marcelo A. Soto, and Luc Thévenaz "Time/frequency coding for Brillouin distributed sensors", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84211J (17 October 2012); https://doi.org/10.1117/12.975001

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