Analysis of mid-spatial frequency wavefront distortions from a liquid-cooled flash-lamp pumped Nd:phosphate laser amplifier  

作　　者：Pierre-Marie Dalbies Sandy Cavaro Edouard Bordenave Nathalie Blanchot Julien G.Moreau Jérôme Neauport 

机构地区：[1]CEA CESTA,Le Barp,France

出　　处：《High Power Laser Science and Engineering》2024年第1期24-29,共6页高功率激光科学与工程（英文版）

基　　金：partially funded by the European Commission(No.3404410,ERDF No.2663710);the‘Conseil Régional de Nouvelle Aquitaine’(No.DEE2104-2019-5131820,CPER No.16004205)。

摘　　要：Mid-spatial frequency wavefront deformation can be deleterious for the operation of high-energy laser systems. When fluid cooled high-repetition-rate amplifiers are used, the coolant flow is likely to induce such detrimental mid-spatial frequency wavefront deformations. Here, we describe the design and performance of a 90 mm × 90 mm aperture, liquid-cooled Nd:phosphate split-slab laser amplifier pumped by flash-lamps. The performance of the system is evaluated in terms of wavefront aberration and gain at repetition rates down to 1 shot per minute. The results show that this single cooled split-slab system exhibits low wavefront distortions in the medium to large period range, compatible with a focus on target, and despite the use of liquid coolant traversed by both pump and amplified wavelengths. This makes it a potential candidate for applications in large high-energy laser facilities.

关 键 词：flash-lamp pumping high-power laser laser cooling neodymium glass wavefront error 

分 类 号：TN248[电子电信—物理电子学] TN722