Research Of Spontaneous Brillouin Distributed Optical Fiber Sensing Technology

Based on the sensing theory of the spontaneous Brillouin scattering, thedependence of the Brillouin scattering intensity, frequency shift and the temperature,strain is presented. Especially, we introduce the theory of the sensing coefficients of theBrillouin frequency shift and the temperature, strain. We finish the demarcating experiment ofthe four sensing coefficients for the four optical fibers, and the separating experiment of thetemperature and strain in one section given length optical fiber. We analyze and simulate theexperimental data. The compare of the four sensing coefficients and the separation of thetemperature and strain were achieved successfully.