Transformation of Laguerre-Gaussian beam by a ring-lens
Jingtao XIN , Zhehai ZHOU , Xiaoping LOU , Mingli DONG , Lianqing ZHU
Front. Optoelectron. ›› 2017, Vol. 10 ›› Issue (1) : 9 -13.
Transformation of Laguerre-Gaussian beam by a ring-lens
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.
ring-lens (RL) / Bessel beam / spatial light modulator (SLM)
Higher Education Press and Springer-Verlag Berlin Heidelberg
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