Collision-induced amplification of radiation in inversionless two-level systems

Amplification of probe radiation by an inversionless two-level system in the 'red' wing of its spectral line is studied theoretically during the resonance absorption of intense cw laser radiation. The effect is caused by the inequality of the spectral densities of the Einstein coefficients...

Full description

Saved in:
Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2009-12, Vol.39 (12), p.1143-1147
Main Authors: Parkhomenko, A I, Shalagin, Anatolii M
Format: Article
Language:English
Subjects:
ABSORPTION
AMPLIFICATION
BUFFERS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
EINSTEIN COEFFICIENTS
ELECTROMAGNETIC RADIATION
EMISSION
ENERGY-LEVEL TRANSITIONS
FUNCTIONS
GAIN
INTERACTIONS
LASER RADIATION
PARTICLES
PRESSURE RANGE
PRESSURE RANGE MEGA PA
PRESSURE RANGE MEGA PA 10-100
PROBES
RADIATIONS
RESONANCE ABSORPTION
SORPTION
SPECTRAL DENSITY
SPECTRAL FUNCTIONS
STIMULATED EMISSION
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Amplification of probe radiation by an inversionless two-level system in the 'red' wing of its spectral line is studied theoretically during the resonance absorption of intense cw laser radiation. The effect is caused by the inequality of the spectral densities of the Einstein coefficients for absorption and stimulated emission outside the absorption line under conditions when homogeneous broadening, due to the interaction of particles with the buffer gas, significantly exceeds the natural broadening (at high pressures of the buffer gas). It is found that the larger the inversionless gain, the higher the buffer gas pressure and the pump radiation intensity. It is established that at high enough pump intensity, the probe field is amplified along the entire region of the 'red' wing of the line (at any negative detunings of the probe field frequency). (nonlinear optical phenomena)
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2009v039n12ABEH014134