FIZIKA A 3 (1994) 1, 1-6

PROPOSAL FOR AMPLIFICATION WITHOUT INVERSION CONSIDERING THE SIMPLE SCHEME OF DOUBLE RESONANCE

FLORIN F. POPESCU
Faculty of Physics, University of Bucharest, Bucharest, Magurele 76900, Romania

Received 29 March 1994

It is shown that amplification without the population inversion may be possible even in the usual case of maser action, that corresponds to a strong pumping field and a weak signal, both at resonance. The optimum conditions for such amplification are established by means of the steady-state solutions of the density matrix for multilevel spin system in dilute paramagnetic crystals at high temperatures.

UDC 537.635
PACS 76.20

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