Dependence of Strain Coefficient on Temperature and Dependence of Temperature Coefficient on Strain for Distributed Strain and Temperature Discrimination

The strain coefficient dependence on temperature and the temperature coefficient dependence on strain have been proven for the first time. With these coefficients from SMF-28e and AOC fiber we have demonstrated that a strain accuracy of 6µe and temperature accuracy of 0.3°C with 50cm spatial resolution can be achieved using the distributed Brillouin scattering-based sensor when strain and temperature change simultaneously.