摘要
基于稳相法原理,构建一种新型无衍射地毯光束。首先,运用稳相法研究径向光栅经过轴锥镜后的菲涅耳衍射,在稳相近似条件下,从理论上获得了一种具有无衍射传输特性的地毯光束。然后,采用振幅型空间光调制器加载不同参数的径向光栅,并在空间光调制器后安装相位调制元件(轴锥镜),经过菲涅耳衍射后,可以在轴锥镜后的一定传输距离内得到一种新的无衍射地毯光束。最终发现,实验结果与理论模拟结果吻合得很好。
On the basis of the stationary phase method,a new diffraction-free carpet beam is generated.Specifically,the Fresnel diffraction of radial gratings after passing through the axicon is investigated by the stationary phase method,and under the approximate conditions of the stationary phase,a kind of carpet beams with the diffraction-free transmission characteristics is theoretically obtained.Then,the amplitude-based spatial light modulator(SLM)is adopted to load the radial gratings with different parameters,and the phase modulation element(axicon)is installed behind SLM.Upon the Fresnel diffraction,a new family of instances of diffraction-free carpet beams can be generated within a certain transmission range behind the axicon.Finally,it is found that the experimental results are in good agreement with the theoretical simulation results.
作者
弓宁
杨婧羽
丁瑶
施逸乐
陈日坚
任志君
Gong Ning;Yang Jingyu;Ding Yao;Shi Yile;Chen Rijian;Ren Zhijun(Key Laboratory of Researching Optical Information Detecting and Display Technology in Zhejiang Province,Zhejiang Normal University,Jinhua 321004,Zhejiang,China;State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2022年第16期1-5,共5页
Acta Optica Sinica
基金
国家自然科学基金(11974314)。
关键词
衍射
无衍射地毯光束
稳相法
径向光栅
轴锥镜
diffraction
diffraction-free carpet beams
stationary phase method
radial grating
axicon
