Wu MH, Chiu YC, Wang TD, Zhao G, Zukauskas A, Laurell F, Huang YC.
Opt Express. 2016 Nov 14;24(23):25964-25973. doi: 10.1364/OE.24.025964.We report superior terahertz parametric generation from potassium titanyl phosphate (KTP) over congruent-grown lithium niobate (CLN) and lithium tantalate (CLT) in terms of parametric gain and laser damage resistance. Under the same pump and crystal configurations, the signal emerged first from KTP, 5% Mg-doped CLN, CLN, and then finally from CLT. The signal growth rate in KTP was comparable to that in 5%-Mg-doped CLN, but the signal power from KTP reached a much higher value after all the other crystals were damaged by the pump laser. Read More