摘要
Lommel光束是由Lommel函数描述的一种结构复杂的无衍射光束,其光学形态可由阶数n、不对称度c0、旋转角度?0等3个参数调控,三参数Lommel光束结构复杂,实验上较难产生。引入了一种复振幅调制技术来产生Lommel光束,利用罗曼型迂回相位编码法,对复杂波前的振幅和相位进行编码,构造出能够产生Lommel光束的二元计算全息图,然后使用全息直写打印系统,将由计算机构建的二元计算全息图加工成实振幅掩模板,实验制备了像素数高达35000 pixel×35000 pixel的掩模板,最终方便地产生了高质量的Lommel光束,该研究方法也为产生其他具有复杂结构的无衍射光束提供了思路。
Lommel beams are a type of complex-structure nondiffractive beams expressed by the Lommel function.Their optical features can be adjusted using three parameters:order n,asymmetry c0,and rotation angle ?0.However,the optical structure of a Lommel beam is complex,making it challenging to be produced experimentally.In this study,we introduce a complex amplitude modulation technique to generate nondiffractive Lommel beams.The amplitude and phase of complex wavefronts are simultaneously encoded using the Lohmann-type detour phase-coding method.High-quality Lommel beams are produced by processing the computer-generated hologram into a real amplitude mask using the holographic direct-writing printing system.In the experiments,the mask plate reaches 35000 pixel×35000 pixel.Furthermore,this study provides a general approach for producing nondiffractive beams with other different complex structures.
作者
杨婧羽
施逸乐
周润
刘子陌
弓宁
陈日坚
任志君
Yang Jingyu;Shi Yile;Zhou Run;Liu Zimo;Gong Ning;Chen Rijian;Ren Zhijun(Key Laboratory of Optical Information Detecting and Display Technology,College of Physics and Electronic Information Engineering,Zhejiang Normal University,Jinhua 321004,Zhejiang,China;Yiwu Industrial and Commercial College,Jinhua 322000,Zhejiang,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2023年第19期105-110,共6页
Laser & Optoelectronics Progress
基金
国家自然科学基金(11974314)。
关键词
无衍射光束
计算全息
罗曼型迂回相位编码法
全息直写打印系统
nondiffractive beam
computer-generated hologram
Lohmann-type detour phase encoding method
holographic direct writing printing system
