Transactions of Nanjing University of Aeronautics & Astronautics
Temperature and Salinity Dual-parameter Sensing Based on Forward Brillouin Scattering in 1060-XP SMF
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Abstract:
A novel temperature and salinity discriminative sensing method based on forward Brillouin scattering （FBS） in 1060-XP single-mode fiber （SMF） is proposed. The measured frequency shifts corresponding to different radial acoustic modes in 1060-XP SMF show different sensitivities to temperature and salinity. Based on the new phenomenon that different radial acoustic modes have different frequency shift-temperature and frequency shift-salinity coefficients， we propose a novel method for simultaneously measuring temperature and salinity by measuring the frequency shift changes of two FBS scattering peaks. In a proof-of-concept experiment， the temperature and salinity measurement errors are 0.12 ℃ and 0.29%， respectively. The proposed method for simultaneously measuring temperature and salinity has the potential applications such as ocean surveying， food manufacturing and pharmaceutical engineering.
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Project Supported:
This work was supported by the National Natural Science Foundation of China （Nos.62175105，61875086）， and Fundamental Research Funds for the Central Universities of China （No.ILB240041A24）.
Clc Number:
TP212.1
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