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

作者机构：CEA CESTALe BarpFrance 

出 版 物：《High Power Laser Science and Engineering》 (高功率激光科学与工程（英文版）)

年 卷 期：2024年第12卷第1期

页      面：24-29页

核心收录：

学科分类：080901[工学-物理电子学] 080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

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) 

主　　题：flash-lamp pumping high-power laser laser cooling neodymium glass wavefront error 

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.