The pulse-formation process in a femtosecond passively mode-locked Ti:sapphire laser with a saturable absorber is investigated. The time to reach the steady state is ˜200 µs. The formation time dependence on the dye concentration and the coincidence of the steady-state pulse width with the self-mode-locked state without a saturable absorber indicate that the function of the saturable absorber is mainly to induce the initial modulation and to shorten the pulse-formation time.
© 1992 Optical Society of America
Nobuhiko Sarukura and Yuzo Ishida, "Pulse evolution dynamics of a femtosecond passively mode-locked Ti:sapphire laser," Opt. Lett. 17, 61-63 (1992)