Phase-sensitive optical time-domain reflectometry with pulse mode EDFA:   Probe pulse preparation
  Probe pulse preparation techniques play an important role for fiber-optic sensing. In this work, we investigate a setup for distributed sensors based on phase-sensitive optical time domain reflectometry ($\Phi$-OTDR) with the use of an erbium doped fibre amplifier (EDFA). In our $\Phi$-OTDR setup with pulse mode EDFA, we reveal a regime providing us both sufficiently large amplification of the probe pulse power together and adequately small probe pulse distortion. We then show that the use of pulse mode EDFA is a cost-effective solution, which allows one to avoid nonlinear effect and ensure sufficient sensitivity of the setup. 
A.O. Chernutsky, A.A. Zhirnov, A.K. Fedorov, E.T. Nesterov, K.V.   Stepanov, Ya.A. Tezadov, E.V. Kondrashin, V.E. Karasik, a...
physics.ins-det physics.data-an physics.optics