Non-local effect in Brillouin optical time-domain analyzer based on Raman amplification

Jia Xinhong; Rao YunJiang; Wang Zinan; Zhang Weili; Ran Zengling; Deng Kun; Yang Zixin

Volume 24 Issue 07

Jun. 2012

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Article Navigation > High Power Laser and Particle Beams > 2012 > 24(07): 1667-1671

Jia Xinhong, Rao YunJiang, Wang Zinan, et al. Non-local effect in Brillouin optical time-domain analyzer based on Raman amplification[J]. High Power Laser and Particle Beams, 2012, 24: 1667-1671.

Citation:

Jia Xinhong, Rao YunJiang, Wang Zinan, et al. Non-local effect in Brillouin optical time-domain analyzer based on Raman amplification[J]. High Power Laser and Particle Beams, 2012, 24: 1667-1671.

Jia Xinhong, Rao YunJiang, Wang Zinan, et al. Non-local effect in Brillouin optical time-domain analyzer based on Raman amplification[J]. High Power Laser and Particle Beams, 2012, 24: 1667-1671.

Citation:

Jia Xinhong, Rao YunJiang, Wang Zinan, et al. Non-local effect in Brillouin optical time-domain analyzer based on Raman amplification[J]. High Power Laser and Particle Beams, 2012, 24: 1667-1671.

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Non-local effect in Brillouin optical time-domain analyzer based on Raman amplification

1.
Key Laboratory of Optical Fiber Sensing and Communications,University of Electronic Science and Technology of China,Chengdu 610054,China;
2.
School of Physics and Electronic Engineering,Sichuan Normal University,Chengdu 610068,China

Publish Date: 2012-07-15

Abstract

Abstract

Compared with conventional Brillouin optical time-domain analyzer (BOTDA), the BOTDA based on Raman amplification allows longer sensing range, higher signal-to-noise ratio and higher measurement accuracy. However, the non-local effect induced by pump depletion significantly restricts the probe optical power injected to sensing fiber, thereby limiting the further extension for sensing distance. In this paper, the coupled equations including the interaction of probe light, Brillouin and Raman pumps are applied to the study on the non-local characteristics of BOTDA based on Raman amplification. The results show that, the system error induced by non-local effect worsens with increased powers of probe wave and Raman pump. The frequency-division-multiplexing (cascading the fibers with various Brillouin frequency shifts) and time-division- multiplexing (modulating both of the Brillouin pump and probe lights) technologies are efficient approaches to suppress the non-local effect, through shortening the effective interaction range between Brillouin pump and probe lights.
- brillouin optical time-domain analyzer,
- non-local effect,
- raman amplification,
- frequency-division-multiplexing,
- time-division-multiplexing

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