LEI Yang, PAN Wei, YAN Lian-shan, et al. Study on temperature and stress distinguish based on distributed optical fiber sensor[J]. 2010, 29(5): 25-27+30.
LEI Yang, PAN Wei, YAN Lian-shan, et al. Study on temperature and stress distinguish based on distributed optical fiber sensor[J]. 2010, 29(5): 25-27+30. DOI: 10.13873/j.1000-97872010.05.015.
Aimed to the problems of temperature and strain coexisting in the distributed optical fiber sensor system
an effective technique for jointing stimulated Brillouin scattering(SBS)and backward Rayleigh scattering(BRS)is proposed.Based on the related characteristics of the temperature and strain of the SBS optical power as well as the BRS optical power operated on the fiber
the effects of temperature and strain on SBS and BRS are analyzed.SBS signal optical power and the BRS signal power received on the laser for pumping light are obtained by numerical solving.The temperature information is obtained by demodulating SBS signal and strain compensation.The effects of strain on temperature precision and spatial resolution is analyzed.