Phase and amplitude modulation of a two-dimensional subwavelength diffractive optical element on artificial distributed-index medium

2002 ◽  
Author(s):  
Hwi Kim ◽  
Byoungho Lee
Keyword(s):  
Amplitude Modulation ◽  
Optical Element ◽  
Diffractive Optical Element ◽  
Two Dimensional ◽  
Distributed Index

Novel full complex-amplitude modulation diffractive optical element

2001 ◽  
Author(s):  
Luiz G. Neto ◽  
Patricia S. Cardona ◽  
Giuseppe A. Cirino ◽  
Ronaldo D. Mansano ◽  
Patrick Verdonck
Keyword(s):  
Amplitude Modulation ◽  
Optical Element ◽  
Complex Amplitude ◽  
Diffractive Optical Element

Completely passive method of speckle reduction utilizing static multimode optical fibre and two-dimensional diffractive optical element

2019 ◽  
Vol 66 (16) ◽  
pp. 1688-1694 ◽  
Author(s):  
Alexander V. Prygun ◽  
Yevhenii M. Morozov ◽  
Tatiana Yu Kliuieva ◽  
Yuriy A. Borodin ◽  
Zi-Chun Le
Keyword(s):  
Optical Fibre ◽  
Optical Element ◽  
Diffractive Optical Element ◽  
Speckle Reduction ◽  
Two Dimensional ◽  
Passive Method ◽  
Multimode Optical Fibre

Novel full complex-amplitude modulation diffractive optical element

2001 ◽  
Author(s):  
Luiz G. Neto ◽  
Patricia S. Cardona ◽  
Giuseppe A. Cirino ◽  
Ronaldo D. Mansano ◽  
Patrick Verdonck
Keyword(s):  
Amplitude Modulation ◽  
Optical Element ◽  
Complex Amplitude ◽  
Diffractive Optical Element

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.

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
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