Multi-Fresnel-Lens Pumping Approach for Simultaneous Emission of Seven TEM00-Mode Beams with 3.73% Conversion Efficiency

• DOI: 10.3390/photonics11090889
• Publication Date: 2024-09-20T14:49:48Z
• Authors: Hugo Costa; Dawei Liang; Ana Matos; Joana Almeida
• Keywords: Fresnel lens; Mode (computer interface)

TEM00-mode operation is a requirement in many laser-based applications due to the small divergence and high-power density of emitted laser beam. A solar scheme was designed numerically studied with goal increasing solar-to-laser power conversion efficiency operation. The collection primary concentration sunlight performed via twelve sets folding mirrors Fresnel lenses, toward head composed fused silica torus volume seven Ce:Nd:YAG rods, side-pump configuration. With this scheme, totaling 212.39 W could potentially be produced from beams, six them being 32.60 each Mx2 = 1.00, My2 1.01 quality factors. Notably, 35.40 W/m2 and, most importantly, 3.73% were achieved. latter value represents 1.81-time improvement over experimental record, established prototype that had single rod an end-side pump