Pulse-width dependence on intracavity bandwidth in synchronously mode-locked cw dye lasers

Abstract
We present a model of the synchronously mode‐locked cw dye laser which predicts a square root dependence of dye pulse width on pump pulse width and intracavity bandwidth (ωc). Experiments performed on the Rhodamine 6G laser confirm the ω−1/2c dependence. For a pump pulse width of 100 ps, subpicosecond dye pulses are obtained for intracavity bandwidths greater than 150 Å, and the minimum pulse width is shown to be limited by the bandwidth of the dye to ∼0.5 ps.