Title :
Raman-based distributed temperature sensor with simplex coding and link optimization
Author :
Park, Jonghan ; Bolognini, Gabriele ; Lee, Duckey ; Kim, Pilhan ; Cho, Pilki ; Di Pasquale, Fabrizio ; Park, Namkyoo
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ.
Abstract :
In this letter, a coded, Raman-based distributed temperature sensor system using 255-bit Simplex coded optical time domain reflectometry (OTDR) and optimized sensing link composed of cascaded fibers with different Raman coefficients, is proposed. This system is compared to a system with an uncoded OTDR on standard single-mode fiber, demonstrating significant enhancement in the interrogation distance (19.5 km from coding gain, and 9.6 km from link optimization). Total sensing range of 37 km at 17-m/3-K spatial/temperature resolution were achieved, while employing conventional low power (80 mW) laser diodes
Keywords :
distributed sensors; encoding; fibre optic sensors; optical time-domain reflectometry; temperature sensors; 19.5 km; 37 km; 80 mW; 9.6 km; Raman-based distributed temperature sensor; Simplex coding; cascaded fibers; link optimization; optical time domain reflectometry; Fiber nonlinear optics; Optical fiber sensors; Optical fiber theory; Optical scattering; Optical sensors; Pulse measurements; Raman scattering; Temperature distribution; Temperature measurement; Temperature sensors; Distributed temperature sensor; optical time domain reflectometry (OTDR); spontaneous Raman scattering (SRS);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.881239
