片状放大器系统是高功率激光装置中最重要的能量和功率来源。主要分析高功率激光驱动器中片状放大器的能量传输和转换问题。放大器中能量转换主要通过储能模块、脉冲氙灯、抽运腔和增益介质等单元实现。通过理论模拟和实验的方法,结合原型装置(TIL)片状放大器,详细研究了不同能量转换环节的效率对放大器整体性能的影响。研究表明,目前原型装置所使用的激光片状放大器通过初步的优化设计,已经达到了5%/cm的小信号增益系数,满足了装置要求。但由于受到关键单元器件加工技术的限制,并没有达到最优化的设计指标。高效率放大器不仅是考虑放大器设计和运行成本的需要,更是保证放大器系统稳定高效运行的需要。

To high power laser driver, the disk amplifiers are the most important sources of energy and power. The energy transmission and conversion in high power laser disk amplifier are discussed. The energy transmission is achieved by the energy bank modules, pulse flash-lamp, pump cavity and gain medium. The effects of different energy transmission process on the whole performance of disk amplifiers are researched by simulation and experiments. Results show that the small signal gain coefficient of 5.0%cm-1 and energy storage efficiency of about 3.0% are achieved by primary optimization in technical integration line (TIL). But because of the quality of some key elements, the best results are not obtained. High efficiency does not only improves the disk amplifier performance, reduce the cost, but also improves the amplifier reliability and stability.