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17 October 2012 Time/frequency coding for Brillouin distributed sensors
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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.
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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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