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We report the influence of optical simple pulse coding on the Brillouin optical time domain analyzer (BOTDA) based on bi-directional Raman amplification. This method is proposed to reduce the frequency uncertainty in long-distance BOTDA under higher spatial resolution. The experimental characterization of 49.6 km temperature sensing with a measurement accuracy of ~1 ℃ under ~2.5 m spatial resolution over the whole length of sensing fiber is demonstrated. The signal-to-noise ratio (SNR) and the optical signal power distribution characteristics of the system are studied experimentally in this paper.
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Keywords:
- distributed optical fiber sensing /
- stimulated Raman scattering /
- Brillouin gain /
- Brillouin optical time domain analyzer (BOTDA)
[1] Alahbabi M N, Cho Y T, Wait P C, Hartog A H, Newson T P 2004 J. Opt. Soc. Am. B 21 1156
[2] Li W, Bao X Y, Li Y, Chen L 2008 Opt. Express 26 21616
[3] Alahbabi M N, Cho Y T, Wait P C, Hartog A H, Newson T P 2004 J. Opt. Soc. Am. B 21 1156
[4] Rodríguez B F, Martín L S, Carrasco S A, Corredera P, Ania-Castañón J D, Thévenaz L, González H M 2010 J. Lightwave Technol. 28 2162
[5] 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]
[6] Martin-Lopez S, Alcon-Camas M, Rodriguez F, Corredera P, Ania-Castañon J D, Thévenaz L, Gonzalez-Herraez M 2010 Opt. Express 18 18769
[7] Zhang C, Rao Y J, Jia X H, Chang L, Ran Z L 2010 Acta Phys. Sin. 59 5523 (in Chinese) [张 超、饶云江、贾新鸿、苌 亮、冉曾令 2010 物理学报 59 5523]
[8] Jia X H, Rao Y J, Chang L, Zhang C, Ran Z L 2010 J. Lightwave Technol. 28 1624
[9] Yang J, Lu Z W, He W M, Lu Y L 2006 Chin. Phys. 15 126
[10] Soto M A, Bolognini G, Pasquale F D 2010 Opt. Express 35 259
[11] Soto M A, Bolognini G, Pasquale F D 2010 Opt. Express 18 14878
[12] Soto M A, Bolognini G, Pasquale F D, Thévenaz L 2010 Meas. Sci. Technol. 21 094024
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[1] Alahbabi M N, Cho Y T, Wait P C, Hartog A H, Newson T P 2004 J. Opt. Soc. Am. B 21 1156
[2] Li W, Bao X Y, Li Y, Chen L 2008 Opt. Express 26 21616
[3] Alahbabi M N, Cho Y T, Wait P C, Hartog A H, Newson T P 2004 J. Opt. Soc. Am. B 21 1156
[4] Rodríguez B F, Martín L S, Carrasco S A, Corredera P, Ania-Castañón J D, Thévenaz L, González H M 2010 J. Lightwave Technol. 28 2162
[5] 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]
[6] Martin-Lopez S, Alcon-Camas M, Rodriguez F, Corredera P, Ania-Castañon J D, Thévenaz L, Gonzalez-Herraez M 2010 Opt. Express 18 18769
[7] Zhang C, Rao Y J, Jia X H, Chang L, Ran Z L 2010 Acta Phys. Sin. 59 5523 (in Chinese) [张 超、饶云江、贾新鸿、苌 亮、冉曾令 2010 物理学报 59 5523]
[8] Jia X H, Rao Y J, Chang L, Zhang C, Ran Z L 2010 J. Lightwave Technol. 28 1624
[9] Yang J, Lu Z W, He W M, Lu Y L 2006 Chin. Phys. 15 126
[10] Soto M A, Bolognini G, Pasquale F D 2010 Opt. Express 35 259
[11] Soto M A, Bolognini G, Pasquale F D 2010 Opt. Express 18 14878
[12] Soto M A, Bolognini G, Pasquale F D, Thévenaz L 2010 Meas. Sci. Technol. 21 094024
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