Open AccessEfficient phase-matching for difference frequency generation with pump of Bessel laser beams
Author(s) -
Pengxiang Liu,
Wei Shi,
Degang Xu,
Xinzheng Zhang,
Guizhong Zhang,
Jianquan Yao
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.000901
Subject(s) - optics , laser , phase (matter) , sum frequency generation , materials science , bessel beam , bessel function , wavelength , nonlinear optics , beam (structure) , phase matching , range (aeronautics) , physics , quantum mechanics , composite material
A type of phase matching for difference frequency generation with Bessel-type pump beams is proposed. In this geometry, the phase matching is achieved in a cone around the laser path by properly controlling the beam profile. An experimental case that 1.5THz generation with ~2μm lasers pumped bulk GaAs crystal is considered. Calculations of the energy conversion characteristics are performed based on a semi-analytical model. The results indicate that this configuration could relax the phase matching condition in a wide range of nonlinear crystals and pump wavelengths.