A Ti: sapphire laser pumped synchronously by a bounded frequency-doubled pulse train of a pulsed mode-locked Nd : YAG laser was presented. The temporal characteristics of the laser and optimal conditions of generating stable ultrashort pulses are also given. A Ti: sapphire laser pumped synchronized by a bounded frequency-doubled pulse train of a pulsed mode-locked Nd: YAG laser was presented. The temporal characteristics of the laser and optimal conditions of generating stable ultrashort pulses are also given.