An all solid-state continuous-wave yellow laser at 571.6 nm is reported.The yellow laser is from two Nd∶YAG line of 1 444 nm and 946 nm being a non-linear sum frequency,which correspond to energy levels in their respective crystal transition for 4F3/2-4I15/2 and 4F3/2-4I9/2,respectively.The yellow laser at 571.6 nm is obtained by using a doubly folded-cavity,type-II critical phase matching RTP crystal intra-cavity sum frequency mixing by 1 444 nm and 946 nm.When injected into two Nd∶YAG crystal for the pump power 25 W and 14.8 W,respectively,yellow laser at 571.6 nm of 562 mW is obtained.The power stability in 4 h is better than ±2.9%.