CAJ | 학술논문

为了使激光扩束器可以长时间的工作于大功率激光照射情况下,在传统多波长激光扩束器的基础上,利用变更材料和结构的方法进行改进,设计了2.3倍和6倍两级扩束的激光扩束器,用光学设计软件分析其像质并进行优化,对像质进行理论分析;加工成型后,置于实际环境中进行实验.经实验验证,在调Q脉冲激光器的峰值功率高达20MW的大功率激光照射下,在系统后1m位置出射光束直径分别为24.5mm和154.8mm,脉冲间隔可以在5s以上,并很好地保持了高斯光束的固有特性.结果表明,扩束器完全达到设计要求,有良好的使用效果.
위료사격광확속기가이장시간적공작우대공솔격광조사정황하,재전통다파장격광확속기적기출상,이용변경재료화결구적방법진행개진,설계료2.3배화6배량급확속적격광확속기,용광학설계연건분석기상질병진행우화,대상질진행이론분석;가공성형후,치우실제배경중진행실험.경실험험증,재조Q맥충격광기적봉치공솔고체20MW적대공솔격광조사하,재계통후1m위치출사광속직경분별위24.5mm화154.8mm,맥충간격가이재5s이상,병흔호지보지료고사광속적고유특성.결과표명,확속기완전체도설계요구,유량호적사용효과.
In order to make a laser beam expander work a long time under high power laser radiation,on the base of the traditional multi-wavelength laser-beam expander,a two-serial expander with magnification of 2.3 and 6 respectively was designed through modifying the optical material and configuration.The expander was optimized and its image quality was analyzed with optical design software.After the expander was manufactured,experiments were performed in practical environment.It could work for a long time under laser radiation with pulse interval of 5s at high peak power up to 20MW,the output beam diameters were 24.5mm and 154.8mm respectively at 1m behind the expender with the characteristic of Gaussian-beam kept very well.The result indicates that the expender meets the design requirement and is practical.