Publication
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.
Rüdiger Urbanke, Seyed Hamed Hassani, Marco Mondelli
Andreas Peter Burg, Lukas Kull, Thomas Toifl, Giovanni Cherubini