Amplifier and Router of Parametric Amplified Four-Wave Mixing

We investigated an optical amplifier and router by the aperture nonlinear phase and the phase angle of parametric amplified four-wave mixing in a thermal rubidium vapor. The three-stage optical amplifier has been realized and the total amplified gain is observed up to 10. The router action results from the multi-peaks (multi-pair two-modes) while the cross talk of router can be realized by the opposite dressing shift of composite Autler-Townes splitting.