Propagation of structured light beams after multiple reflections in a spiral phase plate

Abstract

Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 08/25/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspxAbstract. This work presents propagation dynamics of structured light (complex light) containing optical vortices after it has undergone multiple reflections in a spiral phase plate (SPP) device having a nonzero surface reflection. In the calculations, the thick-plate approximation is assumed as it is expected to give a more accurate representation of the standard geometry of an SPP device from a low-surface reflection to a high-surface reflection. Calculations showing the propagation of counter-rotating optical vortices are presented, and the effect of the statistical nature of photons on the observation of the angular intensity modulation of the beam is discussed. Rumala: Propagation of structured light beams after multiple reflections in a spiral phase plate Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 08/25/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Optical Engineering 111306-8 November 2015 • Vol. 54(11) Rumala: Propagation of structured light beams after multiple reflections in a spiral phase plate Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 08/25/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

Optical vortex with a small core and Gaussian intensity envelope for light-matter interaction

“…9. In the work presented here, the optical vortices will have a Gaussian envelop with a point singularity in the middle of the optical intensity profile [30]. This is a characteristic of the beam profile immediately after the SPP device, and it is possible to observe such an optical vortex profile using a mask with a fork-like structure [31], and liquid crystal q-plate [32].…”

“…Analytic equations describing the propagation of the optical vortex from the evanescent region of the SPP into the far field is given in refs. [30,31,36]. In this work, there are reasons for the measured size of the optical vortex core to be limited to a particular value.…”

Generating Convergent Laguerre-Gaussian Beams Based on an Arrayed Convex Spiral Phaser Fabricated by 3D Printing

“…A kind of convex spiral phaser array for generating convergent LG beams based on spiral phase plate (SPP) [ 26 , 27 , 28 , 29 ] is constructed by us. The fabrication of the micro-structures is completed using 3D printing technology [ 30 , 31 , 32 , 33 ].…”

Laguerre-Gaussian mode division multiplexing in multimode fiber using SLMs in VCSEL arrays

“…Spiralphased plates have also been fabricated to generate a coherent superposition of optical vortices with different winding numbers and surface reflection coefficients [25,26]. In addition, q-plates have been fabricated from liquid-crystal slabs to convert a left circularly polarized beam into a helically phased beam with right circular polarization, or vice versa [27].…”