[PDF]    http://dx.doi.org/10.3952/lithjphys.49203

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 49, 171–174 (2009)


HIGHLY EFFICIENT THIRD HARMONIC GENERATION BY MEANS OF FOUR-WAVE DIFFERENCE-FREQUENCY MIXING IN FUSED SILICA
J. Darginavičius, D. Majus, G. Tamošauskas, and A. Dubietis
Department of Quantum Electronics, Vilnius University, Saulėtekio 9, LT-10222 Vilnius, Lithuania
E-mail: audrius.dubietis@ff.vu.lt

Received 29 January 2009; accepted 19 March 2009

We report on highly efficient third harmonic generation of 1-ps laser pulses in transparent isotropic solid state medium through phase-matched non-collinear four-wave difference-frequency mixing. Third harmonic pulses at 351 nm with 230 μJ energy and 15% energy conversion efficiency were generated in 3-mm-thick UV-grade fused silica sample by use of non-collinear phase matching, cylindrical beam focusing geometry, and pulse-front tilting.
Keywords: third harmonic generation, four-wave mixing
PACS: 42.65.Ky, 42.79.Nv


NAŠUS TREČIOSIOS HARMONIKOS GENERAVIMAS NAUDOJANT KETURBANGĮ SKIRTUMINIO DAŽNIO MAIŠYMĄ LYDYTAME KVARCE
J. Darginavičius, D. Majus, G. Tamošauskas, A. Dubietis
Vilniaus universitetas, Vilnius, Lietuva

Pademonstruotas efektyvus 1 ps trukmės šviesos impulsų trečiosios harmonikos generavimas, naudojant faziškai sinchronizuotą keturbangį skirtuminio dažnio maišymą skaidrioje izotropinėje kietakūnėje terpėje. Taikant nekolinearų fazinį sinchronizmą, cilindrinį pluoštų fokusavimą bei impulso fronto pokrypį, 3 mm storio lydyto kvarco plokštelėje ties 351 nm bangos ilgiu generuoti trečiosios harmonikos impulsai, kurių energija siekė 230 μJ, o energijos keitimo efektyvumas – 15 %.


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