Phase and amplitude near-resonance self-action in periodically modulated laser beams

Full space-time numerical modeling of near-resonance self-action of a beam, whose frequency is harmonically modulated in time, is presented. Maxwell-Bloch equations describing the propagation of the beam through a two-level medium with saturable absorption and refraction are solved using an original...

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Bibliographic Details
Main Authors: Derbov, V.L., Serov, V.V., Plastun, I.L., Larionov, D.A.
Format: Conference Proceeding
Language:English
Subjects:
Amplitude modulation
Frequency modulation
Laser beams
Laser modes
Maxwell equations
Nonlinear equations
Numerical models
Optical modulation
Optical propagation
Phase modulation
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Summary:Full space-time numerical modeling of near-resonance self-action of a beam, whose frequency is harmonically modulated in time, is presented. Maxwell-Bloch equations describing the propagation of the beam through a two-level medium with saturable absorption and refraction are solved using an original stable numerical scheme for multidimensional nonlinear Schrodinger equations. Delayed redistribution of intensity over the beam cross-section due to nonlinear self-focusing and self-phase-modulation effects is shown to affect the phase and the amplitude dynamics of the output signal in a rather nontrivial way, depending on the carrier laser frequency.
DOI:10.1109/ICTON.2003.1263133