Thermally-affected Cosine-Gauss and Parabolic-Gauss beams and comparisons of Helmholtz-Gauss beam families

摘要

This article firstly investigates the thermal effects on the generation of Cosine-Gauss and Parabolic-Gauss beams and compares with the impacts of thermal effects on Bessel-Gauss and Mathieu-Gauss beams reported in our previous works. For this investigation, the intensity distribution of the beams against radial distances at different distances from the beam waist under various pump powers and pump beam waists has been studied. The results show that the thermal effects have severe impact on the laser output, so that true distinguishing of thermally-affected and non-thermal intensity profiles is unlikely feasible. The comparisons show that the thermal effects has minimal impact on the generation of Bessel-Gauss beams. The role of pump beam waist on the strength of the thermal effects was also studied. (C) 2014 Elsevier B.V. All rights reserved.