We report realization of a widely-tunable subnanosecond optical parametric amplifier system in LBO crystal pumped by third harmonic of a passively Q-switched Nd:YAG microlaser system. It yields continuous signal wavelength tunability in the visible spectrum range from 460 nm to 680 nm and idler wavelength – from 740 nm to 1500 nm. We present experimental data and numerical simulations of our optical parametric amplifier and discuss future improvement directions for greater pump to signal conversion efficiency.
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