Title :
30-km spontaneous-Brillouin distributed temperature sensor employing Simplex-coding and low optical input power
Author :
Soto, Marcelo A. ; Bolognini, Gabriele ; Pasquale, Fabrizio Di
Author_Institution :
Scuola Superiore Sant´´Anna, Pisa
Abstract :
In this work we have applied optical pulse-coding technique to spontaneous Brillouin-based distributed temperature sensor (BDTS) based on the Landau-Placzek ratio (LPR). We experimentally show that pulse-coding applied to optical time domain reflectometry (OTDR) based BDTS allows for a significant performance enhancement, avoiding the use of optical amplification. Actually, by using 127-bit Simplex coding, we achieved about 7 dB signal-to-noise ratio improvement at the receiver, allowing for temperature sensing over 30 km-distance with temperature/spatial resolution up to 5.0 K / 40 m using only 10 mW optical peak power at the fiber input.
Keywords :
distributed sensors; encoding; fibre optic sensors; optical time-domain reflectometry; temperature sensors; Landau-Placzek ratio; low optical input power; optical pulse-coding technique; optical time domain reflectometry; signal-to-noise ratio; simplex-coding; spontaneous-Brillouin distributed temperature sensor; Erbium-doped fiber amplifier; Optical fiber sensors; Optical pulses; Optical receivers; Optical scattering; Optical sensors; Pulse amplifiers; Spatial resolution; Stimulated emission; Temperature sensors;
Conference_Titel :
Sensors, 2008 IEEE
Conference_Location :
Lecce
Print_ISBN :
978-1-4244-2580-8
Electronic_ISBN :
1930-0395
DOI :
10.1109/ICSENS.2008.4716436
