A design of laser-diode array (LDA) end-pumped Nd∶YVO4 laser that generates simultaneous laser action at wavelengths 1064 nm and 1342 nm is presented.Using type-I critical phase matching (CPM) BiB3O6,593.5 nm continuous-wave (cw) yellow laser was obtained by 1064 nm and 1342 nm intracavity sum-frequency mixing.The maximum laser output power of 3.6 W is obtained when an incident pump laser of 27.5 W is used.The optical-to-optical conversion is up to 13.2%.To the best of our knowledge,this is the highest conversion efficiency at 593.5 nm by an intracavity sum-frequency Nd∶YVO4 laser.