Grating detuning effect on holographic memory in photopolymers

Hsieh, Mei-Li; Hsu, Ken Yuh

doi:10.1117/1.1402125

Cited by 28 publications

(10 citation statements)

References 8 publications

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“…The last approach was based on the use of the Equation (6) and the relation (9). Here, we again assumed the base grating and for given spectral change we obtained modified grating parameters.…”

Section: Results -Simulationsmentioning

confidence: 99%

“…There are many methods for the analysis and the estimation of the shrinkage of the grating, some of them are based on an interferometric measurement, 8 others on a measurement of the thickness change and the change of the angular selectivity. 3,4,9 Here, we will describe proposed method for an easy, quick, direct and real-time measurement and an estimation of the reflection grating shrinkage.…”

Section: Introductionmentioning

confidence: 99%

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Direct real-time measurement of shrinkage in photopolymer materials during recording of reflection gratings

Vojtíšek

Květoň

2015

SPIE Proceedings

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Photopolymer recording materials aimed at a recording of holograms, diffraction elements for manipulation of light or storing of information received great deal of attention in recent years. For their optimal application it is desirable to characterize them and to know what to expect from them. During the recording of the diffraction gratings (or elements) into this photopolymer materials (but not exclusively) there can be some volume changes of the material itself (so-called shrinkage) which consequently alter the replay performance of such gratings, for example from a perspective of a color fidelity, reconstruction conditions, or diffraction efficiency (in case of a general hologram, the deformation of a holographic image is observed). The main aim is to characterize volume changes and to minimize them with application of some precompensation method in advance and so the resulting grating will have desired properties. In this contribution, we would like to present and discuss measurement method for direct and real-time detection of such volume changes for reflection gratings in low shrinkable photopolymer materials. This measurement method is based on a reconstruction of the grating with low intensity white light under slightly different angle than the angle of the recording is and the analysis on the idea of fringe plane rotation model. For a theoretical background the Kogelnik's Coupled Wave theory and Rigorous Coupled Wave Analysis are used. The recording of the diffraction gratings and measurement of their volume changes is experimentally done for a photopolymer material Bayfol HX101.

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Section: Results -Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Direct real-time measurement of shrinkage in photopolymer materials during recording of reflection gratings

Vojtíšek

Květoň

2015

SPIE Proceedings

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“…[5][6][7] Besides storage of information, recording diffraction gratings into these photopolymer materials provides means for manipulation of light or beam shaping. 8,9 Basically, the idea of recording information into a photopolymer system is based on exposure of the sample to an interference field corresponding to the information one wants to store.…”

Section: Introductionmentioning

confidence: 99%

Real-time direct measurement of diffraction efficiency of reflection gratings in photopolymer recording materials

Vojtíšek

Květoň

2015

SPIE Proceedings

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Photopolymer recording systems have received a great deal of attention as a material for optical information storage and production of diffraction gratings. Before using these materials in such systems, it is important to characterize them and understand the processes which run during holographic recording, so that the recording itself can be optimized to obtain an efficient diffraction grating. In this contribution, we present a new method for real-time measurement of the diffraction response of reflection gratings during the recording process. Usually, the recording process in photopolymers is characterized by the real-time measurement of a transmission diffraction grating growth. This method does not allow measuring the growth of gratings with a very narrow spatial period in the reflection configuration. The new approach is based on the idea that the reflection grating is illuminated with white light at a different angle from the recording one and the diffraction efficiency is continuously measured with a spectrophotometer. Kogelnik's coupled wave theory is used as the theoretical background in this contribution. Experimentally, the photopolymer Bayfol HX has been tested in the reflection configuration and growth curves have been measured to show a good applicability of the detection method.

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“…So far, several models have been presented to describe the volume shrinkage, in which fringe-plane rotation geometry and reciprocal space (K-sphere) are general methods for analyzing this effect [9][10][11][12][13] . However, there are just a few simply geometry approaches, which leaded to neglecting the realistic photochemical processes.…”

Section: Introductionmentioning

confidence: 99%

Shrinkage Simulation of Holographic Grating Using Diffusion Model in PQ-PMMA Photopolymer

Wei

Dai

et al. 2015

MATEC Web of Conferences

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Grating detuning effect on holographic memory in photopolymers

Cited by 28 publications

References 8 publications

Direct real-time measurement of shrinkage in photopolymer materials during recording of reflection gratings

Direct real-time measurement of shrinkage in photopolymer materials during recording of reflection gratings

Real-time direct measurement of diffraction efficiency of reflection gratings in photopolymer recording materials

Shrinkage Simulation of Holographic Grating Using Diffusion Model in PQ-PMMA Photopolymer

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