Interference fringes arising from strong coupling in multiple exposure thick absorption holographic gratings

1984 ◽  
Vol 62 (1) ◽  
pp. 92-96
Author(s):  
Jean J. A. Couture ◽  
R. A. Lessard
Keyword(s):  
Strong Coupling ◽  
Diffraction Efficiency ◽  
Angular Separation ◽  
Multiple Exposure ◽  
Recording Medium ◽  
Holographic Gratings ◽  
Interference Fringes ◽  
Spatial Frequencies

Multiplex holograms can generate modulated interference fringes imaged onto the surface of the recording medium whenever the N reconstructed object waves have a small angular separation. At this reconstruction stage, a strong coupling arises due to the vicinity of the recorded gratings and the small differences of their spatial frequencies. Diffraction efficiency expressions describing the effects of such a coupling are deduced.

scholarly journals Holographic Recording Performance of Acrylate-Based Photopolymer under Different Preparation Conditions for Waveguide Display

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 936
Author(s):  
Zhongwen Shen ◽  
Yishi Weng ◽  
Yuning Zhang ◽  
Chuang Wang ◽  
Ao Liu ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Diffraction Efficiency ◽  
Green Light ◽  
Holographic Recording ◽  
Holographic Gratings ◽  
Preparation Conditions

This work proposes a green light-sensitive acrylate-based photopolymer. The effects of the preparation conditions for the waveguide applied volume holographic gratings (VHGs) were experimentally investigated. The optimum preparation conditions for holographic recording were revealed. After optimization, the peak of VHG diffraction efficiency reached 99%, the diffractive wavelength bandwidth increased from 13 nm to 22 nm, and the corresponding RIM was 0.06. To prove the wide application prospect of the acrylate-based photopolymer in head-mounted augmented reality (AR) displays, green monochromatic volume holographic waveguides were fabricated. The display results showed that the prototype was able to achieve a 28° diagonal FOV and possessed a system luminance of 300 cd/m2.

Diffraction efficiency optimization for multilayered parametric holographic gratings

2021 ◽  
Author(s):  
José Pinto ◽  
Rubén Aylwin ◽  
Gerardo Silva-Oelker ◽  
Carlos Jerez-Hanckes
Keyword(s):  
Diffraction Efficiency ◽  
Holographic Gratings ◽  
Efficiency Optimization

scholarly journals ERROR ANALYSIS OF THE DISPERSION-COMPENSATED WIDE-BAND POLARIZATION SAGNAC INTERFEROMETER

2020 ◽  
Vol XLIII-B1-2020 ◽  
pp. 621-625
Author(s):  
J. Zhu ◽  
K. Zong ◽  
F. Goudail ◽  
N. Zhang ◽  
X. Hou
Keyword(s):  
Diffraction Efficiency ◽  
Incident Light ◽  
Wide Band ◽  
Reconstruction Error ◽  
Optical Elements ◽  
Blazed Grating ◽  
Interference Fringes ◽  
Splitting Ratio ◽  
Imaging Polarimetry ◽  
Modulation Degree

Abstract. Imaging polarimetry can obtain two-dimensional intensity distribution information and its corresponding states of polarization from the target simultaneously. Sagnac polarization imaging interferometer is one of the typical channeled polarimetry technologies. By splitting the incident light through the triangular optical structure, the polarization information of the target is modulated into the interference fringes and can be obtained by the demodulation algorithm. The non-ideal optical elements in the system will cause reconstruction errors. This article analyses several factors that affect the measurement accuracy, including the splitting ratio of polarization beam splitter and the diffraction efficiency of the blazed grating. We derive the modified intensity formula and obtain interference patterns through numerical simulations. By calculating the modulation degree of interference fringes and reconstruction error under different non-ideal parameters, we have come to the conclusion that to meet the requirement of modulation degree > 0.5 and reconstruction error < 10%, the beam splitting ratio of the PBS should be α < 1.22. The diffraction efficiency ratio of s-polarization to p-polarization of the blazed grating should be ηs/ηp > 0.83, and the first-order diffraction efficiency should be η1 > 79%.

Design and Fabrication of Volume Holographic Gratings with Large Angular Bandwidth and High Diffraction Efficiency

2021 ◽  
Vol 41 (2) ◽  
pp. 0205001
Author(s):  
鲁婷婷 Lu Tingting ◽  
冯奇斌 Feng Qibin ◽  
王梓 Wang Zi ◽  
吕国强 Lü Guoqiang
Keyword(s):  
Diffraction Efficiency ◽  
Holographic Gratings ◽  
High Diffraction Efficiency ◽  
High Diffraction

scholarly journals Diffraction Efficiency Enhanced Volume Holographic Gratings via Coupling Ag Thin Film

2019 ◽  
Vol 11 (1) ◽  
pp. 1-5
Author(s):  
Yunping Qiu ◽  
Zhuoya Zhu ◽  
Xiaodie Wang ◽  
Xin Wang ◽  
Yongming Tang ◽  
...  
Keyword(s):  
Thin Film ◽  
Diffraction Efficiency ◽  
Holographic Gratings
Sign in / Sign up

Export Citation Format

Share Document