非线性光学激光合束技术研究进展

Research progress on nonlinear optics laser beam combining technology

回顾了非线性光学激光合束技术的发展历程,阐述了基于光学相位共轭和基于非线性放大过程的合束思想和基本原理,梳理了重叠耦合、种子注入和布里渊四波混频增强相位锁定激光合束方式的标志性成果,总结了等离子体交叉光束能量转移、金刚石拉曼放大和液体布里渊放大激光合束技术的优势和瓶颈。面向高峰值功率、高平均功率、高重复频率激光输出的实现需求,基于布里渊放大激光合束技术具备系统结构简单、功率负载高且散热效率高的优点,提出了实现单脉冲能量100 J、脉冲宽度10 ns、重复频率10 Hz合束激光输出的可行性方案。

The development history of nonlinear optics laser beam combining technology is reviewed.The basic principles and beam combining ideas based on optical phase conjugation and nonlinear amplification process are expounded.The landmark achievements of laser beam combining methods involving the overlapping coupling,the seed injection and the Brillouin four-wave mixing enhanced phase locking are sorted out.The advantages and bottlenecks of plasma cross beam energy transfer,diamond Raman amplification and liquid Brillouin amplification laser beam combining technologies are summarized.Facing the requirements for realizing high peak power,high average power and high repetition rate laser output,based on the advantages of simple system structure,high power load and high heat dissipation efficiency of the Brillouin amplification laser beam combining technology,we proposed a feasible scheme of the combining laser output with pulse energy of 100 J,pulse width of 10 ns,and repetition rate of 10 Hz.