Physical Review A
Phase-dependent amplification in pump-probe experiments
Benjamin Fain, Vadim Khidekel, S. H. Lin
Abstract
The pump pulse creates nonstationarity and coherence in the medium. The amplification (absorption) of the probe pulse in the nonstationary coherent medium belongs to phase-dependent Raman amplification (absorption). In this inversionless mechanism of amplification the phase is determined by the delay time between the pump and the probe pulses.