摘要
采用相位混合算法(PMA)与平滑修正法相结合的混合算法,对激光发出的高斯光束进行整形,得到了均方误差和顶部不均匀度均明显降低的等光强分布。利用液晶空间光调制器(LCSLM)的相位调制特性,实现了对高斯光束的光束整形,获得了光强均匀分布的圆光束和矩形光束输出。得到的输出光束顶部不均匀度和均方误差都低于5%,能量集中度在90%以上。表明此方法是一种实时、可控和高效的激光束整形方法。
A hybrid algorithm based on the phase mixture algorithm（PMA） and profile-smoothing algorithm is used for laser beam shaping,reducing mean square error and nonuniformity of output beam at the same time.Using the phase-modulation characteristics of liquid-crystal spatial light modulator（LCSLM）,an experimental optical system is built up.The input Gaussian laser beam is shaped to flat top circular beam and rectangle beam respectively.The top beam nonuniformity and mean square error of the output beams received by CCD are less than 5%,and the energy concentration is higher than 90%.This mehod is proved to be a real-time,controllable and efficient laser beam shaping method.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2012年第5期125-130,共6页
Acta Optica Sinica
基金
国家自然科学基金(60877003)
辽宁省高校重点实验室(LS2010037)资助课题
关键词
光学设计
光束整形
液晶空间光调制器
相位混合算法平滑修正混合算法
optical design
beam shaping
liquid-crystal spatial light modulator
phase mixture algorithm-profile-smoothing hybrid algorithm
