Partially Coherent Flat-Topped Beam Generated by an Axicon

Applied Sciences

卷:9

Lina Guo¹  Yangjian Cai²  Lin Liu³  Minghui Zhang⁴  Xianlong Liu⁵ 

[1] Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China;

[2] Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province &

[3] School of Optoelectronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China;

[4] School of Physics and Material Science, Anhui University, Hefei 230039, China;

[5] Shandong Provincial Engineering and Technical Center of Light Manipulations &

关键词: coherence and statistical optics;    correlation function;    axicon;    laser beam shaping;   

DOI  :  10.3390/app9071499

来源: DOAJ

【 摘 要 】

The intensity distribution of a partially coherent beam with a nonconventional correlation function, named the multi-Gaussian Schell-model (MGSM) beam, focused by an axicon was investigated in detail. Our numerical results showed that an optical needle with a flat-topped spatial profile and long focal depth was formed and that we can modulate the focal shift and focal depth of the optical needle by varying the width of the degree of coherence (DOC) and the parameters of the correlation function. The adjustable optical needle can be applied for electron acceleration, particle trapping, fiber coupling and percussion drilling.

【 授权许可】

Unknown