scholarly journals THE MAXIMUM DIFFRACTION EFFICIENCY FOR HOLOGRAPHIC STORAGE IN PHOTOREFRACTIVE CRYSTALS

1988 ◽  
Vol 37 (12) ◽  
pp. 2057
Author(s):  
YUE XUE-FENG ◽  
SHAO ZONG-SHU ◽  
CHEN HUAN-CHU ◽  
WANG YING-SU
Keyword(s):  
Diffraction Efficiency ◽  
Holographic Storage ◽  
Photorefractive Crystals

Effect of applied fields on the Bragg condition and the diffraction efficiency in photorefractive crystals

1994 ◽  
Vol 19 (12) ◽  
pp. 910 ◽  
Author(s):  
Raymond De Vré ◽  
Muthu Jeganathan ◽  
Jeffrey P. Wilde ◽  
Lambertus Hesselink
Keyword(s):  
Diffraction Efficiency ◽  
Bragg Condition ◽  
Photorefractive Crystals ◽  
Applied Fields

High-density large-capacity nonvolatile holographic storage in photorefractive crystals

2005 ◽  
Author(s):  
Shiquan Tao ◽  
Zhuqing Jiang ◽  
Wei Yuan ◽  
Yuhong Wan ◽  
Ye Wang ◽  
...  
Keyword(s):  
High Density ◽  
Holographic Storage ◽  
Photorefractive Crystals ◽  
Large Capacity

scholarly journals A Facile Fabrication Route of Poly(Ethylene Glycol Phenyl Ether Acrylate) Photopolymers with Efficient Optical Response for Holographic Storage

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 935
Author(s):  
Fang-Yong Lee ◽  
Xin-Jin Wang ◽  
Wei-Hung Su ◽  
Tzu-Chien Hsu
Keyword(s):  
Ethylene Glycol ◽  
Response Time ◽  
Diffraction Efficiency ◽  
Optical Parameter ◽  
Optical Response ◽  
Holographic Recording ◽  
Initiator Concentration ◽  
Holographic Storage ◽  
Poly Ethylene ◽  
Exposure Energy

A series of photopolymers based on ethylene glycol phenyl ethyl arylate (EGPEA) monomers and poly(methyl methacrylate) (PMMA) matrix with varying initiator concentrations and sample thicknesses have been synthesized and their optical performance characterized in this study. The advantages of lowering the initiator concentration, including a rather short initiation time within a few seconds; a sharp rising optical response; and a stable saturated diffraction efficiency are demonstrated. The variation in the diffraction efficiency and response time with the exposure energy under various sample thickness and initiator concentrations is examined; a diffraction efficiency as high as 80% and a relatively short response time of 12–39 s are attainable. The dependence of the normalized optical parameter “sensitivity” on the exposure time is depicted, and the peak value of S ranges vastly from about 0.2 to 1.2 × 104 cm/J within a period of 15 s or so, with a maximum value of nearly 1.2 × 104. Favorable evidence of low initiator concentration can further be found when the dependence of the saturated diffraction efficiency with the exposure energy is examined. The data from this study using a low initiator concentration cover a range of exposure energy from 100 to 800 mJ/cm2 and a saturated diffraction efficiency from about 15% to 80%. The successful image reconstruction of 6-membered-ring metal nuts on a hologram based on this EGPEA/PMMA photopolymer system using a reflective holographic recording setup is demonstrated to verify its applicability to holographic storage.

Optimum conditions for high-fidelity holographic storage in photorefractive crystals

1995 ◽  
Author(s):  
Shiuan-Huei Lin ◽  
Pochi Yeh ◽  
Mei-Li Hsieh ◽  
Ken Y. Hsu ◽  
Tai Chiung Hsieh
Keyword(s):  
High Fidelity ◽  
Optimum Conditions ◽  
Holographic Storage ◽  
Photorefractive Crystals

Effect of light-induced scattering on diffraction efficiency in photorefractive crystals

1995 ◽  
Vol 4 (6) ◽  
pp. 420-427
Author(s):  
Zhou Zhong-xiang ◽  
Sun Wan-jun ◽  
Sun Xiu-dong ◽  
Zhao Hua ◽  
Xu Ke-bin ◽  
...  
Keyword(s):  
Diffraction Efficiency ◽  
Photorefractive Crystals ◽  
Effect Of Light

Growth and Holographic Storage Properties of Zr:Mn:Fe:LiNbO3 Crystal

2015 ◽  
Vol 731 ◽  
pp. 129-132
Author(s):  
Yi Ran Nie ◽  
Zhi Hui Sun ◽  
Jiang Chang ◽  
Li Juan An ◽  
Zhuang Liu
Keyword(s):  
Response Time ◽  
Diffraction Efficiency ◽  
Czochralski Method ◽  
Absorption Peak ◽  
Transmission Spectra ◽  
Infrared Transmission ◽  
Holographic Storage ◽  
Wave Coupling ◽  
Photo Damage ◽  
Storage Properties

Doping different concentration of ZrO2in Mn:Fe:LiNbO3crystals, a series of Zr:Mn:Fe:LiNbO3crystals were grown by the Czochralski method. The infrared transmission spectra and the photo-damage resistant ability of the crystals were measured. The OH-absorption peak of Zr (2mol%):Mn:Fe:LiNbO3crystal shifts to ultraviolet. The photo-damage resistant ability of Zr (3mol%):Mn:Fe:LiNbO3crystal is about three orders of magnitude higher than that of Mn:Fe:LiNbO3crystals. The diffraction efficiency, response time of Zr:Mn:Fe:LiNbO3crystals were measured by two-wave coupling experiment. The response time of Zr (3mol%):Mn:Fe:LiNbO3crystal is only one tenth of that of Mn:Fe:LiNbO3. The mechanism of OH-absorption peak shifting and improvement of holographic storage properties was discussed.

scholarly journals Optimization of the diffraction efficiency in photorefractive crystals

2017 ◽  
Vol 50 (2) ◽  
pp. 181-186
Author(s):  
A. L. Villamizar Amado ◽  
N. A. Arias Hernández ◽  
M. L. Molina Prado ◽  
M. Tebaldi
Keyword(s):  
Diffraction Efficiency ◽  
Photorefractive Crystals

scholarly journals Enhancement of Photorefraction in Vanadium-Doped Lithium Niobate through Iron and Zirconium Co-Doping

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3143 ◽  
Author(s):  
Shahzad Saeed ◽  
Hongde Liu ◽  
Liyun Xue ◽  
Dahuai Zheng ◽  
Shiguo Liu ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Diffraction Efficiency ◽  
Czochralski Method ◽  
Fast Response ◽  
Holographic Storage ◽  
Co Doping ◽  
Dynamic Holography ◽  
Lithium Niobate Crystals ◽  
High Diffraction ◽  
Co Doped

A series of mono-, double-, and tri-doped LiNbO3 crystals with vanadium were grown by Czochralski method, and their photorefractive properties were investigated. The response time for 0.1 mol% vanadium, 4.0 mol% zirconium, and 0.03 wt.% iron co-doped lithium niobate crystal at 488 nm was shortened to 0.53 s, which is three orders of magnitude shorter than the mono-iron-doped lithium niobate, with a maintained high diffraction efficiency of 57% and an excellent sensitivity of 9.2 cm/J. The Ultraviolet-visible (UV-Vis) and OH− absorption spectra were studied for all crystals tested. The defect structure is discussed, and a defect energy level diagram is proposed. The results show that vanadium, zirconium, and iron co-doped lithium niobate crystals with fast response and a moderately large diffraction efficiency can become another good candidate material for 3D-holographic storage and dynamic holography applications.

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