Answers are grounded in this paper and cite their sources.
We present cw sum-frequency generation of UV radiation at 355 nm based on a high-power laser at 1064 nm and a two-stage quasi-phase-matching nonlinear interaction in periodically poled LiTaO3 crystals. In a first stage, second harmonic at 532 nm is generated. Then, the outcoming IR and green light interact in a second nonlinear crystal to generate about 7 mW of ultraviolet radiation at the sum frequency.
No takes yet. Share an insight, caveat, or question.
Ricciardi et al. (2009) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: