This research was supported by the National Science Foundation.
Journal of the Optical Society of America B: Optical Physics
Dye lasers -- Research, Electromagnetic pulse
We study the operation of a synchronously pumped mode-locked dye laser when the pump pulse is taken as a Dirac delta function, a limit that is sometimes experimentally reasonable. We find that in this limit the model simplifies considerably and that with further assumptions the physical interpretation of synchronously pumped mode-locked operation becomes apparent. Specifically, our nonlinear dynamical model reduces to the same set of equations that govern a prepumped Q-switched laser, and from this simple picture we are able to derive approximate analytic formulas for the synchronously pumped mode-locked laser pulse width and peak intensity. Additionally, we present a closed-form solution for the output pulse in the limit of zero-cavity-length mismatch between the pump laser and the dye laser.
D. L. MacFarlane and Lee W. Casperson, "Theory of a synchronously pumped mode-locked dye laser in the short pump pulse limit," J. Opt. Soc. Am. B 6, 1175-1181 (1989).