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1引言实现惯性聚变能(IFE)电厂的关键之一是驱动器效率。高的驱动器效率能够极大地减少实现聚变增益所需的驱动器能量,实现更小型、更廉价的装置。在所有激光器中,基于导波技术的光纤激光器转换效率最高,如激光二极管抽运的掺Yb光纤放大器的总转换效率为70%,而相对应的自由传输方式的激光系统,其转换效率一般仅为几个百分点。
1 Introduction One of the keys to achieving an inertial fusion energy (IFE) plant is drive efficiency. High driver efficiency can greatly reduce the driver energy required to achieve fusion gain, enabling smaller, cheaper devices. In all lasers, waveguide-based fiber lasers have the highest conversion efficiencies, such as laser diode-pumped Yb-doped fiber amplifiers with a total conversion efficiency of 70%, whereas the corresponding free-lasing laser systems generally have conversion efficiencies of only For a few percentage points.