Zhang Jisheng, Li Yongqian. Study on the simultaneous distributed measurement of temperature and strain based on Brillouin scattering in optical fiber[J]. 2008,(5):53-56.
Zhang Jisheng, Li Yongqian. Study on the simultaneous distributed measurement of temperature and strain based on Brillouin scattering in optical fiber[J]. 2008,(5):53-56. DOI: 10.13756/j.gtxyj.2008.05.021.
For simultaneous distributed measurement of temperature and strain based on Brillouin scattering in optical fibers
there are mainly three effective ways: measuring the Brillouin intensity and Brillouin shift simultaneously
measuring two different Brillouin shifts and monitoring the temperature and strain based on the Raman scattering and Brillouin scattering.In this paper
the principles of these methods have been discussed thoroughly.Two schemes for Brillouin distributed sensing using direct detection and heterodyne detection are studied and a performance and cost comparison between them is made.Finally
a sensing scheme capable of realizing simultaneous measurement of temperature and strain with high accuracy is presented.