A frequency doubled dye laser with a servo-tuned crystal

Spectral tuning of the uv output of a frequency doubled dye laser has been successfully controlled by a servo motor system which tilts the nonlinear crystal appropriate for phase-matched second harmonic generation while the dye laser emission wavelength is tuned. The spatial direction of the generated uv beam is used as the regulating signal. The feasibility of this technique for spectroscopic applications has been successfully tested.