Ultraviolet generation in periodically poled lithium tantalate waveguides

Busacca, A. C.; D'Asaro, E.; Pasquazi, A.; Stivala, S.; Assanto, G.
September 2008
Applied Physics Letters;9/22/2008, Vol. 93 Issue 12, p121117
Academic Journal
We demonstrate ultraviolet generation in lithium tantalate channel waveguides for frequency doubling via quasi-phase-matching. The samples, proton exchanged and nanostructured by electric-field assisted surface periodic poling with domains as deep as 40 μm, yield continuous wave light at 365.4 nm with conversion efficiencies larger than 7.5% W-1 cm-2.


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