title: Raman-based distributed temperature sensor with 1 m spatial resolution over 26 km SMF using low-repetition-rate cyclic pulse coding.
abstract: 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.
authors: Scuola Superiore Sant'Anna, via G. Moruzzi 1, Pisa, 56124, Italy.
authors: Marcelo A
authors: MA
authors: Soto
authors: Tiziano
authors: T
authors: Nannipieri
authors: Alessandro
authors: A
authors: Signorini
authors: Andrea
authors: A
authors: Lazzeri
authors: Federico
authors: F
authors: Baronti
authors: Roberto
authors: R
authors: Roncella
authors: Gabriele
authors: G
authors: Bolognini
authors: Fabrizio
authors: F
authors: Di Pasquale