This study presents a lamp-pumped Nd:glass laser system capable of achieving joule level output energy at 1-Hz repetition rate with high beam quality. The 1.8 J of energy in a 5 ns pulse was achieved with 1.5 mJ injected energy. The laser system includes a beam shaping module and an eight-pass, lamp-pumped amplifier. The laser amplifier demonstrated long-term energy stability of 1.76% PV and 0.29% RMS when operating at 1.8 J for 30 minutes. In a longer period of operation, no damage or obvious beam degradation was found. A uniform gain distribution with a single-pass small-signal gain of 3.89 was acquired with the four-lamp-pumping method, and thermally induced wavefront aberration was mitigated. Finally, a high beam quality was obtained using a homemade optically addressed liquid crystal light valve. After compensation, the near-field modulation decreased from 1.38 to 1.21, meanwhile, the beam contrast decreased from 6.54 to 4.71%. In terms of the far-field quality, a 90% far-field energy concentration was 2.5 times the diffraction limit.

这项研究提出了一种灯泵浦Nd：玻璃激光系统，该系统能够以1 Hz的重复频率实现焦耳级输出能量，并具有高光束质量。用1.5 mJ的注入能量可以在5 ns的脉冲中获得1.8 J的能量。激光系统包括一个光束整形模块和一个八通灯泵浦放大器。该激光放大器在1.8 J下运行30分钟时，具有1.76％PV和0.29％RMS的长期能量稳定性。在较长的运行时间中，未发现损坏或明显的光束衰减。用四灯泵浦法获得单增益小信号增益为3.89的均匀增益分布，并减轻了热引起的波前像差。最后，使用自制的光学寻址液晶光阀可获得高光束质量。赔偿后 近场调制从1.38降低到1.21，同时光束对比度从6.54降低到4.71％。就远场质量而言，90％的远场能量浓度是衍射极限的2.5倍。