Theory of Optical Information Storage in Solids

Heerden, P. J. van

doi:10.1364/ao.2.000393

Cited by 492 publications

(101 citation statements)

References 3 publications

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“…Adding mode multiplexing to an angular multiplexing scheme provides an additional DOF for system design increasing data densities toward the theoretical limit [4]. Currently, the number of multiplexed pages reported in literature is about 440 which is primarily limited by the angular extent of the reference beam scanning [15].…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, current HDSS storage densities are still well below the theoretical limit. 3D optical data storage is limited to the storage density of 1/λ 3 bits/inch 3 [4], which is equivalent to a density on the order of 10 TB/inch 3 . Reaching this goal will require the use of many Degrees Of Freedom (DOFs) to increase number of multiplexing.…”

Section: Introductionmentioning

confidence: 99%

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Cavity-enhanced eigenmode and angular hybrid multiplexing in holographic data storage systems

Miller

Takashima

2016

Opt. Express

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Abstract:Resonant optical cavities have been demonstrated to improve energy efficiencies in Holographic Data Storage Systems (HDSS). The orthogonal reference beams supported as cavity eigenmodes can provide another multiplexing degree of freedom to push storage densities toward the limit of 3D optical data storage. While keeping the increased energy efficiency of a cavity enhanced reference arm, image bearing holograms are multiplexed by orthogonal phase code multiplexing via Hermite-Gaussian eigenmodes in a Fe:LiNbO 3 medium with a 532 nm laser at two Bragg angles. We experimentally confirmed write rates are enhanced by an average factor of 1.1, and page crosstalk is about 2.5%. This hybrid multiplexing opens up a pathway to increase storage density while minimizing modification of current angular multiplexing HDSS.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cavity-enhanced eigenmode and angular hybrid multiplexing in holographic data storage systems

Miller

Takashima

2016

Opt. Express

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“…Каждая из зарегистри-рованных на голограмме решеток в силу условий Брэгга взаимодействует только с той парой волн, которые ее образовали. Это позволяет использовать трехмерную го-лограмму для создания системы ассоциативной памяти, а также уплотнения записи информации посредством многократного впечатывания голограмм в один и тот же объем светочувствительного материала [3,7,8]. К недо-статкам трехмерной голограммы следует отнести то, что составляющими ее трехмерными решетками достаточно сложно управлять по отдельности -стирать, перезапи-сывать информацию и т. д.…”

Section: получение трехмерных изображений методом псевдоглубоких голоunclassified

К 90-Летию Со Дня Рождения Юрия Николаевича Денисюка Идеи Ю.Н. Денисюка В Развитии Голографических Методов Получения И Проекции Изображений

Ганжерли¹

2017

Журнал Технической Физики

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“…Characteristics such as self-development, large dynamic range, good optical properties, thick emulsion layers (high angular selectivity) and relatively low cost make photopolymers one of the most promising materials for write-once read-many (WORM) holographic data storage applications [2,3]. Holograms need to be very thick in order to obtain a high information storage capacity, 1000 times greater than that of a CDROM, and random access time of only 10% of the latter [3]. Furthermore, this property allows us to record volume holographic gratings with high angular selectivity.…”

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confidence: 99%

Stabilization of volume gratings recorded in polyvinyl alcohol-acrylamide photopolymers with diffraction efficiencies higher than 90%

Gallego

Neipp

Ortuño

et al. 2004

Journal of Modern Optics

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Abstract.Obtaining holographic volume gratings with high diffraction efficiencies that can be used under white light has been a serious problem for the polyvinyl alcohol-acrylamide-based photopolymers developed by other researchers. In this paper we propose to eliminate the residual monomer in order to stabilize the holographic gratings. The residual dye and residual monomer are the main problems in achieving high diffraction efficiencies stable under white light. In order to polymerize the residual monomer we illuminate the gratings with coherent green light and incoherent white light and we heat the grating at 80 C for different times. We also study the conservation of gratings dried in critical conditions of humidity and temperature. After stabilization the diffraction efficiencies achieved were clearly higher than 90%. IntroductionPhotopolymers are a good holographic recording material because of their many attractive features [1]. Characteristics such as self-development, large dynamic range, good optical properties, thick emulsion layers (high angular selectivity) and relatively low cost make photopolymers one of the most promising materials for write-once read-many (WORM) holographic data storage applications [2,3]. Holograms need to be very thick in order to obtain a high information storage capacity, 1000 times greater than that of a CDROM, and random access time of only 10% of the latter [3]. Furthermore, this property allows us to record volume holographic gratings with high angular selectivity. Gratings can be used as enhanced edges [4] and in holographic interferometry [5]. Another application of holographic recording materials is the construction of holographic optical elements. For these applications, we need holographic gratings with a minimum transmission efficiency and maximum diffraction efficiency.In order to obtain gratings recorded on poly(vinyl alcohol)PVA-acrylamide (AA) with maximum diffraction efficiency and minimum transmission efficiency at the Bragg angle, we need a good understanding of the behaviour of the photopolymer system. The mechanism that occurs in the recording process is complex but has been modelled successfully by many workers. This type of theoretical

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Theory of Optical Information Storage in Solids

Cited by 492 publications

References 3 publications

Cavity-enhanced eigenmode and angular hybrid multiplexing in holographic data storage systems

Cavity-enhanced eigenmode and angular hybrid multiplexing in holographic data storage systems

К 90-Летию Со Дня Рождения Юрия Николаевича Денисюка Идеи Ю.Н. Денисюка В Развитии Голографических Методов Получения И Проекции Изображений

Stabilization of volume gratings recorded in polyvinyl alcohol-acrylamide photopolymers with diffraction efficiencies higher than 90%

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