Abstract
An investigation was made of the emission spectrum of a cw dye laser with an intracavity lens-like absorbing medium. The emission spectrum of the frequency-locked laser was obtained as a function of the oscillator strength of the absorption line and the resonator tuning, and measurements were also made of the selective reduction in the losses near the absorption line (10 ? 4?10 ? 5 cm ? 1). It was confirmed experimentally that the reason for the frequency locking of the laser radiation was a reduction in the diffraction losses in the resonator under the action of the lens-like properties of the absorbing medium.
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