研制了一套输出能量在100 J以上的大能量高功率钕玻璃激光系统。在设计中,对光路排布进行了优化,对系统放大增益进行了数值模拟,采用像传递技术和受激布里渊散射(SBS)相位共轭技术,提高了激光束的输出质量。Nd:YLF前端输出的单纵模脉冲激光经过两级双程放大和一级助推放大,获得了106 J的能量输出。针对在大口径高能高功率激光系统中应用受激布里渊散射相位共轭镜的要求,设计了一种新型的受激布里渊散射相位共轭镜结构,这种结构克服了传统独立双池的缺点,完全适用于高能高功率激光的双程放大结构。

A high-power phosphate Nd: glass laser system with 100J energy was developed. In the laser design process, the optimization of the optical layout was considered and the amplification gain of laser media was simulated. In the laser system, image relaying and stimulated Brillouin scattering (SBS) are employed to improve the quality of the output beam. A single-longitudinal mode laser pulse provided by a Nd:YLF front-end was amplified by two dual pass amplifiers and a booster amplifier, and the output energy of 106 J was obtained. In view of the requirements of SBS phase conjugating mirror employed to the high energy and high power laser system with large diameter, a new design of the SBS phase conjugating mirror was described. It is fully applicable to the high energy and high power dual pass amplification laser system.