Phase–polarization control of the emission spectra of ring dye lasers

A ring dye laser with a three-mirror resonator and phase–polarization control of the emission spectrum was constructed and investigated. A resonator mirror performed the function of a nonresonant rotator of the plane of polarization of the light wave. Such a system subjected to single-pulse laser pumping was capable of generating narrow-band radiation with a spectral width 2–4 pm and a high signal/noise ratio in a fairly wide range of pump energies.