Dye laser with partially selective resonator

The possibility of controlling the width and spectral position of the emission line of an organic dye laser whose resonator consists of a combination of a selective and nonselective channel was demonstrated. The selective channel includes a nonsymmetrically placed prism; by varying the angular position of this prism one can vary the width of the spectrum over a wide range. The nonselective channel maintains the resonator Q at a sufficiently high level. The change of the tuning range is studied as a function of the ratio of the Q's of the selective and nonselective channels.