An efficient monolithic Q-switched Nd : MgO : LiNbO3 waveguide laser o
perating at 1.085 mum is reported. Q-switched pulses of 350 W peak pow
er and 300 ps width are obtained for less than 15 mW of CW 0.814 mum c
oupled pump power. This source was frequency-doubled in an external qu
asiphase-matched LiNbO3 waveguide yielding 12 W pulses at 0.54 mum wit
h a 15% conversion efficiency.