Parametric down-conversion of Bessel vortex beam in quadratic medium

Author

Pyragaite, V. ; Piskarskas, A. ; Regelskis, K. ; Smilgevicius, V. ; Stabinis, A. ; Mikalauskas, S.

Author_Institution

Dept. of Quantum Electron., Vilnius Univ., Lithuania

fYear

2005

fDate

12-17 June 2005

Firstpage

54

Abstract

This study predicts and demonstrates that orbital angular momentum (OAM) is conserved within the spontaneous down-conversion of Bessel vortex beam in optical parametric generators (OPG). Results show that the output radiation of CDA-based OPG pumped by Bessel vortex beam consists of two pairs of OAM-free axial (Gaussian-like) beam and the conical (Bessel-like) beam, the OAM of which is equal to OAM of pump beam. Hence, the OAM is conserved within the spontaneous parametric down-conversion of higher-order Bessel beams in contrary to OPG pumped by Laguerre-Gaussian modes. That is the result of strong transverse selection of spontaneously arising fields in OPG pumped by Bessel beams.

Keywords

laser beams; optical frequency conversion; optical pumping; optical vortices; Bessel beam; Bessel-like beam; CDA-based OPG; Gaussian-like beam; OAM-free axial beam; conical beam; higher-order Bessel beams; optical parametric generators; orbital angular momentum; parametric downconversion; pump beam; quadratic medium; spontaneous downconversion; vortex beam; Laser beams; Laser excitation; Laser mode locking; Laser tuning; Nonlinear optics; Optical diffraction; Optical pumping; Optical vortices; Ring lasers; Stimulated emission;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum Electronics Conference, 2005. EQEC '05. European

Print_ISBN

0-7803-8973-5

Type

conf

DOI

10.1109/EQEC.2005.1567226

Filename

1567226