High-power passively Q-switched microchip lasers produce 157-μJ pulses of 1-ns duration in a single-frequency, diffraction-limited output beam. The unfocused 1.064-μm output of these devices has been used to drive periodically poled lithium niobate optical parametric amplifiers at wavelengths between 1.4 and 4.3 μm . With a peak conversion efficiency of nearly 100%, these devices generate 100-kW, subnanosecond pulses in the mid IR, with a beam quality that is better than two times diffraction limited.
© 1997 Optical Society of America
[Optical Society of America ]
John J. Zayhowski, "Periodically poled lithium niobate optical parametric amplifiers pumped by high-power passively Q-switched microchip lasers," Opt. Lett. 22, 169-171 (1997)