We report on the efficient CW dual-wavelength operation of a Nd:YAG laser a
t 946 and 938.5 nm. A total output power of 527 mW was obtained with a slop
e efficiency of 34%. By inserting a cadmium mercury thiocyanate (CMTC) crys
tal into the Nd:YAG laser cavity, frequency-doubling of 946 nm and sum-freq
uency-generation of 946 with 938.5 nm were realised simultaneously. Blue li
ght at 473 and 471.1 nm with an output power of 1.6 mW was obtained. Phase
matching calculations were also done for the CMTC crystal. (C) 1999 Elsevie
r Science B.V. All rights reserved.