Efficient single-pass optical. parametric generation and amplification using a periodically poled stoichiometric lithium tantalate

Abstract

A high-conversion efficiency, nanosecond pulsed optical parametric generation and amplification with repetition rate of 20 kHz based on a periodically poled MgO-doped stoichiometric lithium tantalate was presented. Pumped by a Q-switched Nd:YVO4 laser at 1064 nm with a pumping power of 4.8 W, the generated output power was 1.6W for the signal and idler waves, achieving a slope efficiency of 50%. Using a seed source at signal wave the amplified signal output-pulse energy reached 65 mu J. The obtained maximum gain was 72.4 dB.