DocumentCode :
1436967
Title :
Experimental Demonstration on 2.5-m Spatial Resolution and 1 
C Temperature Uncertainty Over Long-Distance BOTDA With Combined Raman Amplification and Optical Pulse Co
Author :
Jia, Xin-Hong ; Rao, Yun-Jiang ; Deng, Kun ; Yang, Zi-Xin ; Chang, Liang ; Zhang, Chao ; Ran, Zeng-Ling
Author_Institution :
Key Lab. of Opt. Fiber Sensing & Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Volume :
23
Issue :
7
fYear :
2011
fDate :
4/1/2011 12:00:00 AM
Firstpage :
435
Lastpage :
437
Abstract :
The combination of Raman amplification and optical pulse coding (OPC) is proposed to reduce the frequency uncertainty in a long-distance Brillouin optical time-domain analyzer (BOTDA) under higher spatial resolution. The experimental characterization of temperature sensing with measurement accuracy ~ 1°C under ~ 2.5-m spatial resolution over a whole length of sensing fiber is demonstrated. The sensing fiber is composed of 49.6-km fiber at 10.8-GHz Brillouin frequency shift (BFS) and 25-km fiber at 11.005 GHz.
Keywords :
Brillouin spectra; Raman lasers; optical pulse generation; optical resolving power; Brillouin frequency shift; Raman amplification; distance 25 km; distance 49.6 km; frequency 10.8 GHz; frequency uncertainty; higher spatial resolution; long distance Brillouin optical time-domain analyzer; long distance botda; optical pulse coding; temperature 1 degC; temperature sensing; temperature uncertainty; Brillouin optical time-domain analyzer (BOTDA); Raman amplification; distributed fiber sensor; optical pulse coding (OPC); stimulated Brillouin scattering;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/LPT.2011.2107551
Filename :
5703105
Link To Document :
