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报道了光脉冲编码对基于拉曼放大的布里渊光时域分析系统(BOTDA)的影响. 实验表明,光脉冲编码能够在保证较高空间分辨率的同时减小布里渊频移的不确定性. 实验实现了49.6 km传感距离, 在整段传感光纤上温度分辨率1 ℃,空间分辨率2.5 m. 本文实验测量并分析了系统的信噪比和光功率分布特性.
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关键词:
- 分布式光纤传感 /
- 受激拉曼散射 /
- 布里渊增益 /
- 布里渊光时域分析系统(BOTDA)
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.-
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 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 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 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 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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