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We experimentally investigate the benefits of a new optical pulse coding technique for long-range, meter and submeter scale Raman-based distributed temperature sensing on standard single-mode optical fibers. The proposed scheme combines a low-repetition-rate quasi-periodic pulse coding technique with the use of standard high-power fiber lasers operating at 1550 nm, allowing for what we believe is the first long-range distributed temperature measurement over single-mode fibers (SMFs). We have achieved 1 m spatial resolution over 26 km of SMF, attaining 3°C temperature resolution within 30 s measurement time.
Optical Society of America
Publication date: 
1 Jul 2011

Marcelo A Soto, Tiziano Nannipieri, Alessandro Signorini, Andrea Lazzeri, Federico Baronti, Roberto Roncella, Gabriele Bolognini, Fabrizio Di Pasquale

Biblio References: 
Volume: 36 Issue: 13 Pages: 2557-2559
Optics letters