Transient processes manifested in the emission spectra of cw wide-band dye lasers used for intracavity laser spectroscopy

A study was made of the kinetics of the emission spectra of cw wide-band dye lasers in the presence of weak frequency-dependent resonator losses. It was found that the position of the center of the emission spectrum fluctuated because of instability of the pump power. Optimization of the pump parameters ensured stable emission of a given frequency for periods up to 10 msec, which corresponded to a sensitivity of $10^{-9}$ cm${}^{-1}$ in intracavity laser spectroscopy.