Transformation of Laguerre-Gaussian beam by a ring-lens

doi:10.1007/s12200-016-0606-3

Front. Optoelectron.

2017, Vol. 10

Issue (1) : 9-13 https://doi.org/10.1007/s12200-016-0606-3

LETTER

Transformation of Laguerre-Gaussian beam by a ring-lens

Jingtao XIN¹,Zhehai ZHOU²,Xiaoping LOU²,Mingli DONG²,Lianqing ZHU^1,²(

)

¹. Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science and Technology University, Beijing 100192, China
². Beijing Key Laboratory for Optoelectronic Measurement Technology, Beijing Information Science and Technology University, Beijing 100192, China

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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)

Corresponding Author(s): Lianqing ZHU

Just Accepted Date: 28 September 2016 Online First Date: 24 October 2016 Issue Date: 17 March 2017

Cite this article:

Jingtao XIN,Zhehai ZHOU,Xiaoping LOU, et al. Transformation of Laguerre-Gaussian beam by a ring-lens[J]. Front. Optoelectron., 2017, 10(1): 9-13.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-016-0606-3
https://academic.hep.com.cn/foe/EN/Y2017/V10/I1/9

Fig.1 Schematic diagram of RL

Fig.2 Diffraction grating pattern of RL

Fig.3 Experimental schematic diagram. P: polarizer, BE: beam expanders, CGH: computer generated hologram, SLM: spatial light modulator, D: diaphragm, L: lens

Fig.4 Simulation results of LG₀₀ and LG₀₂ mode beams passing through RL

Fig.5 Experimental results of LG₀₀and LG₀₂ mode beams passing through RL

Fig.6 Field distributions of generated Bessel beam at different propagation distance

Fig.7 Transverse profiles of the generated Bessel beams and theoretical Bessel beams. (a) Zero-order; (b) first-order

Fig.8 Field distributions of generated Bessel beam passing through an obstacle at different propagation distance

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