Polarization converter for higher-order laser beams using a single binary diffractive optical element as beam splitter

2012 ◽  
Vol 37 (12) ◽  
pp. 2385 ◽  
Author(s):  
Svetlana N. Khonina ◽  
Sergey V. Karpeev ◽  
Sergey V. Alferov
Keyword(s):  
Beam Splitter ◽  
Optical Element ◽  
Higher Order ◽  
Diffractive Optical Element ◽  
Laser Beams ◽  
Polarization Converter

Extended focus diffractive optical element for Gaussian laser beams

2006 ◽  
Vol 45 (1) ◽  
pp. 144 ◽  
Author(s):  
Michael A. Golub ◽  
Valery Shurman ◽  
Israel Grossinger
Keyword(s):  
Optical Element ◽  
Diffractive Optical Element ◽  
Laser Beams

Generating hypergeometric laser beams with a diffractive optical element

2008 ◽  
Vol 47 (32) ◽  
pp. 6124 ◽  
Author(s):  
V. V. Kotlyar ◽  
A. A. Kovalev ◽  
R. V. Skidanov ◽  
S. N. Khonina ◽  
J. Turunen
Keyword(s):  
Optical Element ◽  
Diffractive Optical Element ◽  
Laser Beams

scholarly journals Holographic Display System to Suppress Speckle Noise Based on Beam Shaping

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 204
Author(s):  
Di Wang ◽  
Yi-Wei Zheng ◽  
Nan-Nan Li ◽  
Qiong-Hua Wang
Keyword(s):  
Optical Element ◽  
Speckle Noise ◽  
Beam Shaping ◽  
Diffractive Optical Element ◽  
The Other ◽  
Spatial Light Modulators ◽  
Viewing Angle ◽  
Display System ◽  
Holographic Display ◽  
Light Modulators

In this paper, a holographic system to suppress the speckle noise is proposed. Two spatial light modulators (SLMs) are used in the system, one of which is used for beam shaping, and the other is used for reproducing the image. By calculating the effective viewing angle of the reconstructed image, the effective hologram and the effective region of the SLM are calculated accordingly. Then, the size of the diffractive optical element (DOE) is calculated accordingly. The dynamic DOEs and effective hologram are loaded on the effective regions of the two SLMs, respectively, while the wasted areas of the two SLMs are performed with zero-padded operations. When the laser passes through the first SLM, the light can be modulated by the effective DOEs. When the modulated beam illuminates the second SLM which is loaded with the effective hologram, the image is reconstructed with better quality and lower speckle noise. Moreover, the calculation time of the hologram is reduced. Experiments indicate the validity of the proposed system.

scholarly journals A Side-Absorption Concentrated Module with a Diffractive Optical Element as a Spectral-Beam-Splitter for a Hybrid-Collecting Solar System

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 192
Author(s):  
An-Chi Wei ◽  
Wei-Jie Chang ◽  
Jyh-Rou Sze
Keyword(s):  
Fill Factor ◽  
Beam Splitter ◽  
Light Guide ◽  
Solar Spectrum ◽  
Optical Element ◽  
Grating Period ◽  
Infrared Light ◽  
Solar Systems ◽  
Module Efficiency ◽  
Energy Conversion Devices

In this paper, we propose a side-absorption concentrated module with diffractive grating as a spectral-beam-splitter to divide sunlight into visible and infrared parts. The separate solar energy can be applied to different energy conversion devices or diverse applications, such as hybrid PV/T solar systems and other hybrid-collecting solar systems. Via the optimization of the geometric parameters of the diffractive grating, such as the grating period and height, the visible and the infrared bands can dominate the first and the zeroth diffraction orders, respectively. The designed grating integrated with the lens and the light-guide forms the proposed module, which is able to export visible and infrared light individually. This module is demonstrated in the form of an array consisting of seven units, successfully out-coupling the spectral-split beams by separate planar ports. Considering the whole solar spectrum, the simulated and measured module efficiencies of this module were 45.2% and 34.8%, respectively. Analyses of the efficiency loss indicated that the improvement of the module efficiency lies in the high fill-factor lens array, the high-reflectance coating, and less scattering.

High-efficiency subwavelength diffractive optical element in GaAs for 975 nm

1995 ◽  
Vol 20 (12) ◽  
pp. 1441 ◽  
Author(s):  
M. E. Warren ◽  
R. E. Smith ◽  
G. A. Vawter ◽  
J. R. Wendt
Keyword(s):  
High Efficiency ◽  
Optical Element ◽  
Diffractive Optical Element

Processing and error compensation of diffractive optical element

2014 ◽  
Author(s):  
Yunlong Zhang ◽  
Zhibin Wang ◽  
Feng Zhang ◽  
Hui Qin ◽  
Junqi Li ◽  
...  
Keyword(s):  
Error Compensation ◽  
Optical Element ◽  
Diffractive Optical Element

Optimal design of a multilayer diffractive optical element for dual wavebands

2010 ◽  
Vol 35 (24) ◽  
pp. 4157 ◽  
Author(s):  
Changxi Xue ◽  
Qingfeng Cui ◽  
Tao Liu ◽  
Liangliang Yang ◽  
Bing Fei
Keyword(s):  
Optimal Design ◽  
Optical Element ◽  
Diffractive Optical Element

Characteristics of diffractive optical element for multispot beam homogenizing

2004 ◽  
Author(s):  
Takayuki Hirai ◽  
Keiji Fuse ◽  
Kenichi Kurisu ◽  
Keiji Ebata
Keyword(s):  
Optical Element ◽  
Diffractive Optical Element
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