Title :
1-cm-Spatial-Resolution Brillouin Optical Time-Domain Analysis Based on Bright Pulse Brillouin Gain and Complementary Code
Author :
Mao, Y. ; Guo, N. ; Yu, K.L. ; Tam, H.Y. ; Lu, C.
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Kowloon, China
Abstract :
We studied the impact of optical pulse coding techniques on Brillouin optical time-domain analysis (BOTDA) systems experimentally. The results show that complementary-coding-based schemes can provide significant enhanced signal-to-noise ratio (SNR) to the BOTDA system. Using complementary coding, the average time can be reduced significantly and so does the measurement time. The complementary-coded pulses with individual pulse duration of 0.1 ns allowed us to realize temperature sensing over 50 m of single-mode fiber with 1-cm spatial resolution.
Keywords :
Brillouin spectra; codes; fibre optic sensors; temperature sensors; BOTDA systems; Brillouin optical time-domain analysis; SNR; average time; bright pulse Brillouin gain; complementary code; measurement time; optical pulse coding techniques; pulse duration; signal-to-noise ratio; single-mode fiber; size 50 m; spatial-resolution; temperature sensing; Encoding; Optical fiber sensors; Optical fibers; Scattering; Spatial resolution; Temperature measurement; Brillouin gain spectrum; optic fiber sensors; optical pulse coding; time-domain analysis;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2012.2226710
