A continuously tunable Ti:sapphire laser system with a acoustooptic Q-switched intra-cavity frequency doubled Nd:YAG laser at 532 nm as the pump source is introduced.By adaptive coating design,the broad tunability from 680 nm to 940 nm has been obtained just using a single output mirror.Choosing a prism as dispersion element,the linewidth of the center wavelength at 795 nm is narrowed to 5 nm.The maximum average output power is 2.2 W,at the incident pump power of 12 W with the repetition rate of 4.5 kHz.