Open AccessOptical parametric generation in biaxial KTA crystal under pumping by YAG:Nd laser in arbitrary directions
Author(s) -
U. I. Dashkevich,
А. А. Русак,
Г. И. Тимофеева,
А. П. Шкадаревич,
П. А. Апанасевич,
V. A. Orlovich
Publication year - 2021
Publication title -
vescì nacyânalʹnaj akadèmìì navuk belarusì. seryâ fìzìka-matèmatyčnyh navuk
Language(s) - English
Resource type - Journals
eISSN - 2524-2415
pISSN - 1561-2430
DOI - 10.29235/1561-2430-2021-57-3-374-384
Subject(s) - optics , monochromatic color , laser , parametric statistics , phase (matter) , materials science , radiation , signal (programming language) , phase matching , crystal (programming language) , optical parametric amplifier , wavelength , physics , range (aeronautics) , mathematics , optical amplifier , statistics , quantum mechanics , computer science , composite material , programming language
Herein, on the basis of expressions for the refractive indices of isonormal waves, the possibility of performing collinear phase matching for optical parametric generation in arbitrary directions of a biaxial KTA crystal under pumping by radiation of a YAG:Nd laser is analyzed. The tuning curves that determine the tuning range of the signal and idler for type-I and II-type phase-matching and arbitrary angles θ and φ in cases where the tuning is carried out along the angle θ at a xed angle φ and vice versa are calculated. The eective nonlinear coecient is determined. It is shown that their maximum value is achieved аt a polar angle θ = 90° and type-II phase-matching. For the case of generation of eye-safe radiation the spectral and angular phase matching widths were estimated, as well as gain widths of KTA-OPO under monochromatic pumping.