Spectral and spatial characteristics of cw beams self-action in three-level media with inversionless amplification

Inna L. Plastun

doi:10.1117/12.486642

11 December 2002 Spectral and spatial characteristics of cw beams self-action in three-level media with inversionless amplification

Inna L. Plastun

Author Affiliations +

Proceedings Volume 4938, Selected Papers from the International Conference on Spectroscopy of Molecules and Crystals; (2002) https://doi.org/10.1117/12.486642
Event: XV International School on Spectroscopy of Molecules and Crystals, 2001, Chernivsti, Ukraine

Abstract

The transmission spectra of inversionless amplification are investigated. Propagation of a weak probe optical beam through a three-level medium pumped with a microwave strong beam is numerically modeled. Three various schemes of transitions under the conditions providing the amplification of the probe field without inversion are taken to calculate the atomic polarization, which enters the paraxial wave equations. Diffraction and self-action ofbeams due to nonlinear absorption and refraction are properly taken into account. These effects together with linear absorption and refraction form a complex distribution of gain across the beams. As a result the amplified beam acquires ring transverse patterns and slight asymmetry in the frequency characteristics.

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Inna L. Plastun "Spectral and spatial characteristics of cw beams self-action in three-level media with inversionless amplification", Proc. SPIE 4938, Selected Papers from the International Conference on Spectroscopy of Molecules and Crystals, (11 December 2002); https://doi.org/10.1117/12.486642

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