Sum-frequency generation of cw ultraviolet radiation in periodically poled LiTaO(3).
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.
Ricciardi
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I
CNR-INOA, Istituto Nazionale di Ottica Applicata, Sezione di Napoli, Via Campi Flegrei 34, I-80078 Pozzuoli (NA), Italy.
De Rosa
M
M
Rocco
A
A
Ferraro
P
P
Vannucci
A
A
Spano
P
P
De Natale
P
P