We design a monolithic Q switched Er:LiNbO 3 waveguide laser with up to 1.5 kW higher peak power using a folded Mach Zehnder intensity modulator as the Q switch.The performance of 1 480 nm pumped waveguide lasers and 980 nm pumped waveguide lasers is compared.We find,that the latter have higher peak power and narrower pulse width though have higher threshold pump power.