Non-collinear quasi phase matching and annular profiles in difference frequency generation with focused Gaussian beams

Year: 2008

Authors: Malara P., Maddaloni P., Mincuzzi G., De Nicola S., De Natale P.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata (INOA) and European Laboratory for Non-Linear Spectroscopy (LENS), Comprensorio \”A. Olivetti\”, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; Consiglio Nazionale delle Ricerche – Istituto di Cibernetica \”E. Caianiello\”, Comprensorio “A. Olivetti\”, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; Dipartimento di Scienze Ambientali, Seconda Università di Napoli, Via Vivaldi 43, Caserta Italy

Abstract: We present and experimentally test a simple model for difference frequency generation (DFG) in periodically-poled crystals with gaussian pumping beams. Focusing of input beams originates several non-collinear quasi-phase-matching configurations of the interacting wavevectors, which contribute to the idler output field. In this picture, we accurately describe a number of effects, such as the occurrence of annular idler intensity profiles and the asymmetric trend of DFG power vs temperature. Finally, we quantitatively test the model by means of an indirect measurement of the crystal poling period. (c) 2008 Optical Society of America.

Journal/Review: OPTICS EXPRESS

Volume: 16 (11)      Pages from: 8056  to: 8066

KeyWords: Focusing; Gaussian beams; Mathematical models; Phase matching, Annular profiles; Crystal poling period; Difference frequency generation (DFG); Wavevectors, Crystal structure, article; computer aided design; computer simulation; crystallization; equipment; equipment design; instrumentation; light; methodology; nonlinear system; normal distribution; optics; radiation scattering; statistical model, Computer Simulation; Computer-Aided Design; Crystallization; Equipment Design; Equipment Failure Analysis; Light; Models, Statistical; Nonlinear Dynamics; Normal Distribution; Optics; Scattering, Radiation
DOI: 10.1364/OE.16.008056

Citations: 6
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