Generation of high-order optical vortices with nanostructured phase masks


Nguyen H.T., Kasztelanic R., Pysz D., Le H.V., Stepien R., Omatsu T., Krolikowski W., Buczynski R.


We report theoretical and experimental studies on generation of high-order optical vortex beams using fiber-based nanostructured gradient index converters. The components were made of two types of in-house developed soft glasses with lead, bismuth, gallium compositions to ensure the high refractive contrast of the synthesized glasses. As a result, the vortex components, fabricated using the stack-and-draw method, allow converting Gaussian beam into vortex beams with high-order topological charges in the visible and near-infrared regions. We experimentally verified the formation of optical vortex beams with topological charge up to 5 by using the free-space binary-nanostructured vortex components. In addition, the vortex converter integrated into the standard fiber tip generated optical vortex beams with topological charge up to 4.

Optics & Laser Technology, 2024, vol. 172, art. 110490, doi: 10.1016/j.optlastec.2023.110490

Opublikowano dnia - 27 grudnia 2023 08:47
Ostatnia zmiana - 5 stycznia 2024 10:03
Publikujący - Sekretariat IGF