Brillouin optical time domain analyzer based on bi-directional Raman amplification
Zhang Chao1, Jia Xin-Hong1, Chang Liang1, Ran Zeng-Ling1, Rao Yun-Jiang2
(1)Key Laboratory of Optical Fiber Sensing and Communications, Ministry of Education, School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China; (2)Key Laboratory of Optical Fiber Sensing and Communications, Ministry of Education, School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China; Key Laboratory of Optoelectronic Techn
Abstract We report a Brillouin optical time domain analyzer (BOTDA) based on bi-directional Raman amplification in this paper. With the bi-directional Raman amplification, the loss of the optical fiber and the depletion of Brillouin pump light can be compensated for efficiently, hence the measurement resolution is improved at the end of the optical fiber significantly. The detected signal is stable along the whole length of the sensing fiber, free from the spectral broadening caused by the modulation instability and the problem of uneven ness of detected signals of the conventional BOTDA. The Raman amplification is very useful for enhancing the measurement accuracy. With the bi-directional Raman pump, a temperature resolution of 0.6 ℃ was achieved over a sensing distance of 50 km with a 50 m spatial resolution. The signal-to-noise ratio and the optical signal power distribution characteristics of the system have been studied by experiment.
Horiguchi T, Shimizu K, Kurashima T, Tateda M, Koyamada Y 1995 J. Lightwave Technol. 13 1296
[2]
Shimizu K, Horiguchi T, Koyamada Y, Kurashima T 1993 Opt. Lett. 18 185
[3]
Alahbabi M N, Cho Y T, Newson T P 2004 Meas. Sci. Technol. 15 1544
[4]
Alahbabi M N, Cho Y T, Wait P C, Hartog A H, Newson T P 2004 J. Opt. Soc. Am. B 21 1156
[5]
Smith J, Brown A, DeMerchant M, Bao X 1999 Appl. Opt. 38 5372
[6]
Soto M A, Bolognini G, Pasquale F D 2008 Opt. Express 16 19097
[7]
Islam M N 2002 IEEE J. Sel. Top. Quantum Electron. 8 548
[8]
Gupta G C, Wang L L, Mizuhara O, Tench R E, Dang N N,Tabaddor P,Judy A 2003 IEEE Photonics Technol. Lett. 15 996
[9]
Rasmusssen C, Fjelde T, Bennike J, Liu F, Dey S, Mikkelsen B, Mamyshev P, Serbe P, Wagt P, Akasaka Y, Harris D, Gapontsev D, Ivshin V, Hall P R 2004 J. Lightwave Technol. 22 203
[10]
Ma Y H, Xie S Z, Chen M H 2005 Acta Phys. Sin. 54 123(in Chinese) [马永红、谢世钟、陈明华 2005 物理学报 54 123]
[11]
Tong Z, Wei H, Jian S S 2006 Acta Phys. Sin. 55 1873 (in Chinese) [童 治、魏 淮、简水生 2006 物理学报55 1873]
[12]
Yun P, Chi R H, Li Y G, Lv K C 2004 Acta Phys. Sin. 53 4229 (in Chinese) [运 鹏、迟荣华、李乙钢、吕可诚 2004 物理学报 53 4229]
[13]
Bernini R, Minardo A, Zeni L 2002 Proc. IEEE Sensors 1214 1006
[14]
Naruse H, Tateda M, Ohnoet H 2002 The 15th Optical Fiber Sensors Conference Technical Digest, Portland, May 6—10, 2002 p309
2010, Vol. 59 
