scholarly journals 5.2: Invited Paper: A Method for Measuring the Relationship between Phase Retardation and Grayscale of LCoS Based on Binary Grating‐Diffraction Efficiency

2021 ◽  
Vol 52 (S1) ◽  
pp. 29-29
Author(s):  
Shiyi Yang ◽  
H. Yang ◽  
Lang Qin ◽  
Yujian Shi ◽  
Qing Li
Keyword(s):  
Diffraction Efficiency ◽  
Phase Retardation ◽  
Grating Diffraction ◽  
The Relationship ◽  
Binary Grating

Measuring the Relationship between Grayscale and Phase Retardation of LCoS based on Binary Optics

2020 ◽  
Vol 51 (S1) ◽  
pp. 140-143
Author(s):  
Shiyi Yang ◽  
H. Yang ◽  
Lang Qin ◽  
Yujian Shi ◽  
Qing Li
Keyword(s):  
Phase Retardation ◽  
Binary Optics ◽  
The Relationship

scholarly journals Bragg Grating Diffraction light at Different Wavelength and Incident Light

2019 ◽  
Vol 8 (9S) ◽  
pp. 385-389
Keyword(s):  
Electric Field ◽  
Diffraction Efficiency ◽  
Signal To Noise Ratio ◽  
Incident Angle ◽  
Incident Light ◽  
Simulation Software ◽  
Bragg Grating ◽  
X Ray Diffraction ◽  
Diffraction Of Light ◽  
Grating Diffraction

The diffraction grating is an important device that makes use of the diffraction of light to produce spectra. Diffraction is also fundamental in other applications such as x-ray diffraction studies of crystals and holography. We proposed a design of Bragg grating waveguide to investigate the behavior of diffraction of light at different incident angle and wavelengths. Using finite difference time domain (FDTD) photonics simulation software the performance of proposed waveguide is observed in term of output power, electric field, diffraction efficiency (DE) and signal to noise ratio (SNR). It is found that the proposed waveguide provides better diffracted light with electric field distribution with 1.969 v/m, Diffraction efficiency 8%, and SNR (25.5 dB) at 1.55µm wavelength and 00 degrees of incident angle

scholarly journals General model of transmission grating diffraction efficiency

2011 ◽  
Vol 60 (9) ◽  
pp. 094212
Author(s):  
Shang Wan-Li ◽  
Yang Jia-Min ◽  
Zhao Yang ◽  
Zhu Tuo ◽  
Xiong Gang
Keyword(s):  
Diffraction Efficiency ◽  
General Model ◽  
Transmission Grating ◽  
Grating Diffraction

scholarly journals Wavefront control of laser beam using optically addressed liquid crystal modulator

2018 ◽  
Vol 6 ◽  
Author(s):  
Dajie Huang ◽  
Wei Fan ◽  
He Cheng ◽  
Gang Xia ◽  
Lili Pei ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Laser Beam ◽  
Control Method ◽  
Phase Distribution ◽  
Phase Retardation ◽  
Light Modulator ◽  
Wavefront Control ◽  
Spatial Phase ◽  
Working Principle ◽  
The Relationship

An optically addressed liquid crystal modulator for wavefront control of 1053 nm laser beam is reported in this paper. Its working principle, control method and spatial phase modulation capability are mainly introduced. A new method of measuring the relationship between gray level and phase retardation is proposed. The rationality of the curve is further confirmed by designing special experiments. According to the curve, several spatial phase distributions have been realized by this home-made device. The results show that, not only the maximum phase retardation is larger than $2\unicode[STIX]{x03C0}$ for 1053 nm wavelength, but also the control accuracy is high. Compared with the liquid crystal on silicon type spatial light modulator, this kind of modulator has the advantages of generating smooth phase distribution and avoiding the black-matrix effect.

A NEMATIC REPLICA OF A HOLOGRAPHIC POLARIZATION GRATING: MODELING OF THE IDEAL AND A CORRUGATED SURFACE

2006 ◽  
Vol 15 (01) ◽  
pp. 23-32 ◽  
Author(s):  
S. P. PALTO ◽  
M. I. BARNIK ◽  
A. V. ARBUZOV ◽  
B. A. UMANSKII ◽  
L. M. BLINOV
Keyword(s):  
Diffraction Efficiency ◽  
Optical Axis ◽  
Spatial Modulation ◽  
Phase Retardation ◽  
Corrugated Surface ◽  
First Order ◽  
Nematic Liquid Crystal Layer ◽  
Photosensitive Polymer ◽  
Anchoring Energy ◽  
The Ideal

When a nematic liquid crystal layer is brought in contact with a photosensitive polymer, on which a holographic grating is recorded by two laser beams with opposite circular polarization, due to a spatial modulation of the direction of the local optical axis, the photopolymer modulates the anchoring conditions for NLC in a similar way. As a result, a similar grating is induced in NLC with the enhanced diffraction efficiency and specific diffraction properties controlled by electric field.6 Here we show that, even in the case of a typical finite value of the anchoring energy, the numerical modeling confirms the characteristic asymmetric diffraction of the circularly polarized reconstructing beam and exchange by energy between the zero and first-order diffracted beams. Some other properties, such as reduced diffraction efficiency, appearance of higher diffraction orders and too-large optical phase retardation of a nematic cell at the areas occupied by gratings, can also be modeled by assuming some corrugation of the surface.

Testing Process and Result Revising on Instrument for Plane Grating Diffraction Efficiency

2011 ◽  
Vol 31 (7) ◽  
pp. 0705002
Author(s):  
寇婕婷 Kou Jieting ◽  
巴音贺希格 Bayanheshig ◽  
唐玉国 Tang Yuguo ◽  
齐向东 Qi Xiangdong ◽  
于宏柱 Yu Hongzhu
Keyword(s):  
Diffraction Efficiency ◽  
Grating Diffraction

Calibration method of transmission grating diffraction efficiency with weak high-order harmonics

2014 ◽  
Vol 26 (1) ◽  
pp. 12008
Author(s):  
朱托 Zhu Tuo ◽  
尚万里 Shang Wanli ◽  
杨家敏 Yang Jiamin ◽  
熊刚 Xiong Gang ◽  
赵阳 Zhao Yang ◽  
...  
Keyword(s):  
Diffraction Efficiency ◽  
Calibration Method ◽  
High Order ◽  
Transmission Grating ◽  
Grating Diffraction

SIMULASI LENSA GRATING TERHADAP EFISIENSI DIFRAKSI GRATING PADA SISTEM PEMISAH CAHAYA SPEKTRAL CONCENTRATED PHOTOVOLTAIC/THERMAL

ROTOR ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 11
Author(s):  
Yuke Hary Laksono ◽  
Okasatria Novyanto
Keyword(s):  
Aspect Ratio ◽  
Visible Light ◽  
Diffraction Efficiency ◽  
New Technology ◽  
Infrared Light ◽  
Wavelength Shift ◽  
Beam Splitting ◽  
Result Show ◽  
Binary Grating ◽  
Ir Light

A spectral beam splitting concentrated photovoltaic/thermal (SBS CPVT) system is a new technology in PV areas . In order to split the sunlight, the grating lens is used in this study. The tool of this study is G-Solver software which simulates the diffraction efficiency of visible light and infrared light of the blazed and binary grating lens.  The aim of this paper is to analyze the potential of the diffraction efficiency of grating lens when applied in SBS CPVT. The result show that binary grating, the highest diffraction efficiency for the visible light is also almost unchanged for the aspect ratio from 1.4 to 2, but the peak wavelength shift from around 360 nm to 510 nm, while, for IR light, the diffraction efficiency decrease from aspect ratio 1.4 to 2. On the other hand, blazed grating, The highest diffraction efficiency for the visible light is almost unchanged for the aspect ratio from 1.4 to 2, but the peak wavelengths shift from around 350 nm to 500 nm. While IR light, the diffraction efficiency decrease with the aspect ratio 1.4 to 2

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