9 May 2001 Transmission spectra of cw beams affected by self-action under inversionless amplification conditions
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Proceedings Volume 4243, Saratov Fall Meeting 2000: Laser Physics and Photonics; and Spectroscopy and Molecular Modeling; (2001); doi: 10.1117/12.426681
Event: Saratov Fall Meeting 2000, 2001, Saratov, Russian Federation
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 of beams 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, "Transmission spectra of cw beams affected by self-action under inversionless amplification conditions", Proc. SPIE 4243, Saratov Fall Meeting 2000: Laser Physics and Photonics; and Spectroscopy and Molecular Modeling, (9 May 2001); doi: 10.1117/12.426681; http://dx.doi.org/10.1117/12.426681
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KEYWORDS
Absorption

Laser beam diagnostics

Beam propagation method

Refraction

Polarization

Wave propagation

Chemical species

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