We consider a method for efficient parametric generation of a laser pulse. A single laser field is injected into a three-level medium that has two lower states and one excited state. The lower states are initially prepared in a position-dependent coherent superposition state. It is shown that, by proper choice of the position dependence of the superposition along the direction of propagation, the incoming field can be completely converted to a new field.
© 2002 Optical Society of America
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.7070) Nonlinear optics : Two-wave mixing
(270.1670) Quantum optics : Coherent optical effects
(270.5530) Quantum optics : Pulse propagation and temporal solitons
E. Paspalakis and Z. Kis, "Enhanced nonlinear generation in a three-level medium with spatially dependent coherence," Opt. Lett. 27, 1836-1838 (2002)