Two-dimensional simulation of near-longitudinally pumped dye laser amplifiers

摘要

Simulations of near-longitudinally pumped dye laser amplifiers are demonstrated in this paper. We developed a two-dimensional model that considers the amplified spontaneous emission (ASE). The influence of the angle between the input beam and pump beam on the extraction efficiency, ASE, and heating process of the amplifiers is investigated. It was found that for the main amplifiers with high pump and input powers, both the extraction efficiency and the ASE are insensitive to variations in the pump angle. However, for preamplifiers with a low input power, the increase in the angle causes a more significant loss in efficiency and a higher ASE generation. For the heating caused by light, the influence of the pump angle is insignificant. The results suggest that near-longitudinal pumping is appropriate for main amplifiers but not for preamplifiers. (C) 2020 Optical Society of America