Pump encoding in distributed Brillouin fiber sensors

Zhi-yuan Jiang; Wei Pan; Lian-shan Yan; Bin Luo; Zhi-yong Zhang; Zhong-yao Ren; Yang Lei

doi:10.1007/s11801-010-9201-9

Optoelectronics Letters ›› 2010, Vol. 6 ›› Issue (3) : 232-236. DOI: 10.1007/s11801-010-9201-9

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Pump encoding in distributed Brillouin fiber sensors

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Abstract

Pump encoding is an effective approach to enhance the weak signal detection in distributed Brillouin fiber sensors. In this paper, a new encoding matrix that can improve the detection performance is proposed. Furthermore, a distributed fiber sensor for both single and encoding pump operations is numerically analyzed by using Brillouin-scattering coupled amplitudes equations. The results demonstrate that the matrix can reduce the transmission times for pumping light and simplify the coding process. The power of the scattering signal and the coding gain can be improved with the increasing code length. The detected scattering optical power is almost three orders of magnitude higher than that of the single pulse pump, as the coding length is 31, corresponding to 14.4 % improvement for the coding gain compared with the S matrix encoding method. At the same time, the temperature uncertainty can also be decreased.

Keywords

Digital Signal Processor / Code Length / Pump Light / Optoelectronic Letter / Temperature Uncertainty

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Zhi-yuan Jiang, Wei Pan, Lian-shan Yan, Bin Luo, Zhi-yong Zhang, Zhong-yao Ren, Yang Lei. Pump encoding in distributed Brillouin fiber sensors. Optoelectronics Letters, 2010, 6(3): 232‒236 https://doi.org/10.1007/s11801-010-9201-9

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This work has been supported by the Program for New Century Excellent Talents in University of China (No. 08-0821), and the Fund of State Key Laboratory of Advanced Optical Communication Systems and Networks, China.