Transformation of Laguerre-Gaussian beam by a ring-lens

Abstract

The propagation property of Laguerre-Gaussian (LG) beams passing through a diffractive ring-lens (RL) was studied, where the RL was generated by a liquid crystal spatial light modulator (LC-SLM). It was found that the LG beam was transformed into a sharp ring at the focal plane first, and then a Bessel-similar beam was formed behind the focal plane but the beam size was enlarged with the increase of propagation distance. With the help of a group of lenses, the beam was further collimated into a Bessel beam. Finally, the “non-diffractive” and self-reconstruction properties of the generated Bessel beams were experimentally verified.

Keywords

ring-lens (RL) / Bessel beam / spatial light modulator (SLM)

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Acknowledgements

This work was supported by the Program for ChangJiang Scholars and Innovative Research Team in University, PCSIRT(IRT1212), the National Natural Science Foundation of China (Grant Nos. 61475021 and 61108047).

RIGHTS & PERMISSIONS

2016 Higher Education Press and Springer-Verlag Berlin Heidelberg