Experimental generation of Laguerre-Gaussian beam using digital micromirror device.
A digital micromirror device (DMD) modulates laser intensity through computer control of the device. We experimentally investigate the performance of the modulation property of a DMD and optimize the modulation procedure through image correction. Furthermore, Laguerre-Gaussian (LG) beams with different topological charges are generated by projecting a series of forklike gratings onto the DMD. We measure the field distribution with and without correction, the energy of LG beams with different topological charges, and the polarization property in sequence. Experimental results demonstrate that it is possible to generate LG beams with a DMD that allows the use of a high-intensity laser with proper correction to the input images, and that the polarization state of the LG beam differs from that of the input beam.
Ren
Yu-Xuan
YX
Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China.
Li
Ming
M
Huang
Kun
K
Wu
Jian-Guang
JG
Gao
Hong-Fang
HF
Wang
Zi-Qiang
ZQ
Li
Yin-Mei
YM