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基于棱镜的色散特性,提出一种楔形窗口与聚焦透镜组合的方式,解决了高功率激光装置三倍频谐波分离所存在的问题,即三倍频的高通量传输和靶面辐照。结合“神光Ⅱ”装置多功能高能激光系统有关参数进行系统设计,确定了楔形窗口参数,并对其所引起的B积分和间距误差进行了分析。通过实验测试,三倍频传输通量由0.7～1J/cm2提高到2.8J/cm2,同时靶面三倍频和二倍频分离间距达到2.85mm,实现了高功率激光装置高通量传输的三倍频谐波分离。
Based on the dispersion characteristics of the prism, a combination of wedge-shaped window and focusing lens was proposed to solve the problem of triple-frequency harmonic separation in high-power laser devices, namely high-frequency triplet transmission and target surface irradiation. Combined with the relevant parameters of the multifunctional high energy laser system of “ShenGuang Ⅱ”, the wedge window parameters were determined, and the errors of B integral and spacing caused by them were analyzed. Through the experimental test, the triplet frequency transmission flux is increased from 0.7 ~ 1J / cm2 to 2.8J / cm2, and the target triple-frequency and double-frequency separation distance is 2.85mm, realizing the high-throughput transmission of high power laser devices Triple frequency harmonic separation.