A 53-km Simplex-coded distributed temperature sensor based on coherent detection of Brillouin frequency shift is demonstrated with 1.1 K and 35 m resolutions, using only 10 mW input peak power.
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Alejandro Dominguez Lopez
Luc Thévenaz, Zhisheng Yang, Simon Adrien Zaslawski