Abstract

A high efficiency and high peak power picosecond (ps) mid-infrared optical parametric amplifier with a new nonlinear crystal BaGa4Se7 pumped by a 30 ps 1064 nm Nd:YAG laser is demonstrated for the first time. The maximum photon conversion efficiency of 56% from 1064 nm to 3.9 μm idler has been achieved at the pump energy of 1.8mJ. A maximum idler output of 830 μJ at 3.9 μm with peak power of 27MW was obtained at pump energy of 9.1mJ. Moreover, a 3–5 μm idler tuning range was demonstrated, with output energies of 300μJ at 5 μm and up to 1 mJ at 3 μm at 8.2mJ pump energy.

© 2013 Optical Society of America

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