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Type: 
Journal
Description: 
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
Publisher: 
IEEE
Publication date: 
23 Oct 2006
Authors: 

Jonghan Park, Gabriele Bolognini, Duckey Lee, Pilhan Kim, Pilki Cho, Fabrizio Di Pasquale, Namkyoo Park

Biblio References: 
Volume: 18 Issue: 17 Pages: 1879-1881
Origin: 
IEEE Photonics Technology Letters