Holographic Pattern Fixing in Electro-Optic Crystals

Amodei, J. J.; Staebler, D. L.

doi:10.1142/9789812832047_0069

Cited by 16 publications

(19 citation statements)

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“…The holographic fixing approaches include thermal fixing, electrical fixing [5] and double-photon fixing [6]. The thermal fixing process, a pioneering method for holographic storage, first observed by Amodei and Staebler in Fe:LiNbO 3 crystal [7], utilizes the characteristics of photorefractive crystals that ions tend to move at high temperatures. It is generally believed that basic running mechanism for thermal fixing of photorefractive holograms is that protons move under the action of the electronic charge field and ultimately compensate electronic grating.…”

Section: Introductionmentioning

confidence: 99%

Lifetime of thermally fixed holograms and gratings in Zn:Fe:LiNbO3 crystals

Rong

Leng

2015

Optik

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Section: Introductionmentioning

confidence: 99%

Lifetime of thermally fixed holograms and gratings in Zn:Fe:LiNbO3 crystals

Rong

Leng

2015

Optik

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“…But when photorefractive crystals are used as the holographic recording material, the recorded holograms are erased during readout. Various techniques have been developed for fixing holograms thermally or electrically 1,2 . Another method is the use of periodic copying 3 .…”

Section: Introductionmentioning

confidence: 99%

Digital hologram reconstruction using the dual-wavelength method

Kim

2003

SPIE Proceedings

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In this paper, to reduce the Bragg-mismatch problem of the dual-wavelength method, we record the hologram in the Dupont's photopolymer of thickness L=38µm and use a digital image data which has 78×104 bit/page. Also, to compensate the image magnification problem, a pair of cylinder lens consisting of 4F system behind the F 2 lens and proposed data matrix image processing technique is used. As a result, the raw BER through Gaussian fitting after extracting binary data is around 3.09×10 -6 .

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“…But there remains a problem of volatility: the read out process usually erases the stored information. Several methods such as electrical fixing 2 and thermal fixing 3 were proposed to solve this volatile problem. But they have some disadvantages which affect the practical implementation of holographic storage.…”

Section: Introductionmentioning

confidence: 99%

Grating spacing dependence of nonvolatile photorefractive holographic recording in doubly doped LiNbO 3 crystals

et al. 2003

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Grating spacing has great influence on grating formation via electron transport in the conduction band during holographic recording. Grating spacing dependence of two center holographic recording is investigated by writing nonvolatile holograms in doubly doped LiNbO 3 crystals. Several types of electron characteristic transport lengths are defined. The effects of electron characteristic transport lengths and oxidation-reduction state on the amplitude of nonvolatile holographic grating are numerically discussed within the range of grating spacing from 0.14µm to 10µm. It is found that the bulk photovoltaic effect is the dominant electron transport mechanism of doubly doped LiNbO 3 crystals, while the diffusion effect does have appreciable effect on the grating formation when grating spacing is smaller than 1µm. Theoretical analysis and experimental results confirm that the logarithm of the amplitude of nonvolatile holographic grating Log (δn) increases with increasing grating spacing Λ within region of small grating spacing (Λ smaller than 1µm) and further increasing of grating spacing won't influence the values of Log (δn) greatly.

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Holographic Pattern Fixing in Electro-Optic Crystals

Cited by 16 publications

References 0 publications

Lifetime of thermally fixed holograms and gratings in Zn:Fe:LiNbO3 crystals

Lifetime of thermally fixed holograms and gratings in Zn:Fe:LiNbO3 crystals

Digital hologram reconstruction using the dual-wavelength method

Grating spacing dependence of nonvolatile photorefractive holographic recording in doubly doped LiNbO 3 crystals

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