A 555 nm all solid-state continuous-wave yellow-green laser with 946 nm wavelength from

4

F

3/2

-

4

I

9/2

transition in Nd:YAG and 1 342 nm wavelength from

4

F

3/2

-

4

I

13/2

transition in Nd:YVO

4

is reported. 555 nm yellow-green laser is obtained using a doubly folded-cavity and type-I critical phase matching LBO crystal intracavity sum frequency mixing by 946 nm and 1 342 nm.When the incident pumped powers of Nd:YAG and Nd:YVO

4

crystals are 12 W and 8 W

respectively

the output power of 555 nm yellow-green laser in TEM

00

mode is 542 mW

also its power stability in 4 h is better than ±3.7％. The experimental results show that the intracavity sum-frequency mixing is an effective method for 555 nm laser and it can be applied to other two laser crystals to obtain more all-solid-state lasers with different wavelengths.