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Surface-emitted THz-wave generation using difference frequency mixing with ridge-shaped periodically poled lithium niobate (PPLN) was demonstrated. The PPLN produces THz-waves in opposite directions, and overlapping each THz-wave increased the total THz-wave intensity about 2.7 times.
We demonstrate THz-pulse shaping of ultimate flexibility, manipulating spatially dispersed multi-frequency components generated by optical rectification in a fanned-out PPLN. The modulated THz-spectrum maps out the spatial pattern of optical excitation beam on the crystal.
We demonstrate for the first time Q-switched and mode-locked laser operation of the Li6Y(BO3)3:Yb3+ crystal. Up to 140 muJ pulse energy and down to 355 fs pulse duration were achieved.
A novel resonator concept that produces axisymmetric output from a thin-planar gain medium with a highly elliptical pump cross-section is described. Preliminary studies of this power-scalable approach using a Nd:YLF slab laser are presented.
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