Focusing properties of the hyperbolic-cosine-Gaussian beam induced by phase plate

2006 ◽  
Vol 360 (2) ◽  
pp. 330-335 ◽  
Author(s):  
Xiumin Gao
Keyword(s):  
Gaussian Beam ◽  
Phase Plate ◽  
Hyperbolic Cosine ◽  
Focusing Properties

Focusing properties of Gaussian beam by a nonspiral phase plate system

Optik ◽  
2008 ◽  
Vol 119 (14) ◽  
pp. 671-681
Author(s):  
Jinsong Li ◽  
Xiumin Gao ◽  
Jian Wang ◽  
Songlin Zhuang
Keyword(s):  
Gaussian Beam ◽  
Phase Plate ◽  
Plate System ◽  
Focusing Properties

Focal depth and focal splitting of truncated hyperbolic-cosine-Gaussian beam induced by phase plate

Optik ◽  
2009 ◽  
Vol 120 (5) ◽  
pp. 231-236 ◽  
Author(s):  
Jinsong Li ◽  
Songlin Zhuang ◽  
Xiumin Gao ◽  
Yinzhong Xie
Keyword(s):  
Gaussian Beam ◽  
Focal Depth ◽  
Phase Plate ◽  
Hyperbolic Cosine

scholarly journals Focusing properties of an axicon pair

1993 ◽  
Vol 71 (1-2) ◽  
pp. 70-78 ◽  
Author(s):  
Marc Couture ◽  
Michel Piché
Keyword(s):  
Stationary Phase ◽  
Numerical Method ◽  
Gaussian Beam ◽  
Fresnel Diffraction ◽  
Optical Systems ◽  
Phase Method ◽  
Stationary Phase Method ◽  
Diffraction Integral ◽  
Peak Intensity ◽  
Focusing Properties

The focusing properties of a so-called reflaxicon (a combination of a diverging and a converging axicon) are studied both theoretically and experimentally. Calculations of intensity distributions produced by this system are made by evaluating the Kirchhoff–Fresnel diffraction integral, first by means of an approximate technique, the stationary phase method, then by a more exact numerical method. The calculations are presented for various planes along the axis of the axicons. The effects of the presence of the supporting mount of the axicons and of some important misalignments of the system on the distributions is also investigated. Experimental results of actual intensity distributions produced by focusing a near-fundamental Gaussian beam by such a system are also presented and are seen to be in fair agreement with numerical calculations. Such calculations would be valuable in many applications for predicting important characteristics (e.g., peak intensity, length of the focal line, degree of asymmetry) of the intensity distributions formed by optical systems containing an axicon pair as the focusing component.

scholarly journals Longitudinal Component Properties of Circularly Polarized Terahertz Vortex Beams

2021 ◽  
Vol 9 ◽  
Author(s):  
Miao Wang ◽  
Xinke Wang ◽  
Peng Han ◽  
Wenfeng Sun ◽  
Shengfei Feng ◽  
...  
Keyword(s):  
Spot Size ◽  
Longitudinal Component ◽  
Transverse Component ◽  
Quarter Wave Plate ◽  
Phase Plate ◽  
Vortex Beam ◽  
Circularly Polarized ◽  
Left Hand ◽  
Quarter Wave ◽  
Focusing Properties

A circularly polarized vortex beam possesses similar focusing properties as a radially polarized beam. This type of beam is highly valuable for developing optical manufacturing technology, microscopy, and particle manipulation. In this work, a left-hand circularly polarized terahertz (THz) vortex beam (CPTVB) is generated by utilizing a THz quarter wave plate and a spiral phase plate. Focusing properties of its longitudinal component Ez are detailedly discussed on the simulation and experiment. With reducing the F-number of the THz beam and comparing with a transverse component Ex of a general circularly polarized THz beam, the simulation results show that the focal spot size and intensity of its Ez component can reach 87 and 50% of Ex under a same focusing condition. In addition, the experimental results still demonstrate that the left-hand CPTVB can always maintain fine Ez focusing properties in a broad bandwidth, which manifest the feasibility of this class of THz beams.

Tight focusing properties of phase modulated transversely polarized sinh Gaussian beam

2016 ◽  
Vol 49 (1) ◽  
Author(s):  
C. Mohana Sundaram ◽  
K. Prabakaran ◽  
P. M. Anbarasan ◽  
K. B. Rajesh ◽  
A. Mohamed Musthafa ◽  
...  
Keyword(s):  
Gaussian Beam ◽  
Tight Focusing ◽  
Focusing Properties

Focusing Properties of Partially Coherent Gaussian Beam with Cosine-Lorentz Correlated Structural Function

2017 ◽  
Vol 37 (11) ◽  
pp. 1126001
Author(s):  
朱 洁 Zhu Jie ◽  
唐慧琴 Tang Huiqin ◽  
李晓利 Li Xiaoli
Keyword(s):  
Gaussian Beam ◽  
Structural Function ◽  
Partially Coherent ◽  
Focusing Properties
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