Sum frequency effect of tunable Ti：Al203 double-wavelength laser radiation inp—BaB204 crystal

According to Sellmeier's equations for BBO crystal,the relationship of phase matching angle of generating the sum frequency effect to wavelength is theoreti-cally calculated.A tunable Ti:Al2O3 double-wavelength laser is used as the laser source and the violet-UV pulse sum frequency laser radiation is established.The experi-ments show the excellent agreement with theoretical calculation.