Generation of coherent frequency-tunable radiation in<i>F</i>centers

Abstract

An investigation was made of lasers utilizing the F2, F2+ and F2− centers emitting in the spectral range 0.6–1.26 μ. Quasi-cw stimulated emission from the F2− centers was obtained as a result of pumping with a cw YAG laser (λ = 1.06 μ). Thermal tuning of the emission frequency was observed and a qualitative explanation of this effect was found. The time stability of the centers and the influence of the pump radiation were studied. A fairly simple method for restoring the F2+ centers was found.