大能量全固态再生放大器研究进展

在固体激光脉冲放大器中，再生放大器具有增益高、光束质量好以及结构简单等优点，得到了广泛的关注和应用。经过几十年的不断发展，再生放大器已经能够实现数百mJ脉冲能量以及数kW均值功率的稳定输出。增益材料特性、腔型结构、泵浦能力、热效应、元器件性能等诸多方面都会影响再生放大器的输出特性，其中增益材料特性是最根本的因素。由于特性不同，基于不同增益材料体系的再生放大器在结构和功能上都会有较大的差异。基于不同的材料体系，介绍了各类体系下的再生放大器在发展过程中遇到的关键共性问题，以及几类典型的再生放大器及其特点。讨论了再生放大器未来的发展趋势。

Progress in high energy all-solid-state regenerative amplifier

Among solid-state laser amplifiers, regenerative amplifiers which have the advantages of high gain, good beam quality and simple structure, have been widely concerned and applied. After decades of development , regenerative amplifiers are able to realize pulse energy of several hundred millijoules and average power of several kilowatts in stable operation. The output performance of regenerative amplifiers is determined by properties of gain media, structure of cavity, pump condition, thermal effect and qualities of components. The properties of gain media are the most essential factors. Because of different properties of materials, regenerative amplifiers based on different kinds of materials present different structure and performance. Based on different material systems, the key common problems encountered in the development process of regenerative amplifiers under various systems, as well as several typical types of regenerative amplifiers and their characteristics are introduced. The future development trend of regenerative amplifiers is discussed.