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Type: 
Journal
Description: 
A distributed temperature sensor based on spontaneous Brillouin scattering and employing optical pulse coding has been implemented and characterized using a direct-detection receiver. The signal-to-noise ratio (SNR) enhancement provided by coding is analyzed, along with the influence of coding in stimulated Brillouin threshold. Simplex-coding using 127 bit codeword provides up to 7 dB SNR improvement, allowing for temperature sensing over 21 km of dispersion shifted fiber with 3.1 K resolution and 40 m spatial resolution, permitting to avoid the use of optical pulse amplification.
Publisher: 
IEEE
Publication date: 
28 Jan 2008
Authors: 

Marcelo A Soto, Prasant K Sahu, Gabriele Bolognini, Fabrizio Di Pasquale

Biblio References: 
Volume: 8 Issue: 3 Pages: 225-226
Origin: 
IEEE Sensors Journal