高功率激光的三倍频高效转换实验  

EXPERIMENT OF HIGH EFFICIENCY THIRD HARMONIC CONVERSION IN XINGGUANG LASER FACILITY

作　　者：郑万国 魏晓峰 张小民 袁晓东 刘华 徐冰 叶金祥 满永在 

机构地区：[1]西南核物理与化学研究所高温高密度等离子体重点实验室

出　　处：《强激光与粒子束》1995年第3期417-421,共5页High Power Laser and Particle Beams

摘　　要：利用两块φ８０ｍｍ×１４ｍｍＫＤＰ晶体，采用“偏振失配”方案在“星光”装置φ７０输出光路上，进行了三倍频实验。在入射光功率密度约为１ＧＷ／ｃｍ￣２时，获得最高的二倍频外部能量转换效率为７６．９％，三倍频最高外部能量转换效率为６６．８％，并且转换重复性和稳定性很好。同时，也通过实验研究了影响三次谐波转换的诸因素。AbstractUsing short wavelength laser to drive ICF capsules have been recognized for some time,it can increase the efficient absorption of laser energy and reduce hot electrons of fuel beingpreheating.We have made third harmonic conversion experiments on Xingguang laser facility.The polarization-mismatch scheme with twoφ80mm ×14mm potassium KDP crystals isadopted;In experiment,we selected design scheme,optinuzed crystals length by theorycalculation and built up a three dimention rack for crystals at first,then converse thefoundmental wave.When input foundmental wave intensity to the first crystal is more than0. 7GWl/cm￣2,external third haimonic conversion energy efficiency is about 60%, second harmonicconversion is about 70%,the maximum is 66.8% for third harmonic and 76.8% forsecond-harmonic.Some factors effected third harmonic conversion have been researched.Basing on all of these results,we can get high effciency and high stability third-harmonicconverslon.

关 键 词：高功率 激光 三次谐波转换 三倍频 

分 类 号：TL612[核科学技术—核技术及应用] TL632.1