Thermal stability of volume Bragg gratings in chloride photo-thermo-refractive glass after femtosecond laser bleaching

Klyukin, Dmitry; Ivanov, S. A.; Krykova, Victoria; Silvennoinen, Martti; Svirko, Yuri; Никоноров, Н. В.

doi:10.1364/ol.43.001083

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…Photo-thermorefractive (PTR) glass is an alternative to the commonly used photosensitive materials. Its optical properties are equal to the properties of BK7 glass; it has no shrinkage and is not sensitive to temperature changes in the range from −20 • C to +100 • C or ambient humidity [8][9][10]. Thus, volume diffraction optical elements (DOE) made of PTR glass are protected from possible destruction during operation and do not require additional safety glass to ensure safe contact with the waveguide.…”

Section: Introductionmentioning

confidence: 99%

Selective Couplers Based on Multiplexed Volume Holographic Gratings for Waveguide Displays

et al. 2021

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Diffraction waveguides are widely used in augmented reality devices as information display systems for the introduction of data into the human visual field in order to supplement information about the world around us. This paper formulates the principles of radiation conversion in diffraction waveguides made of photo-thermo-refractive glass on the basis of multiplexed volume holographic gratings, and the advantages and disadvantages of high spectral-angular selectivity are analyzed. In the optical scheme, each of the superimposed volume holographic gratings in the diffraction waveguide forms a corresponding part of the composite angular field of view of the augmented reality device. A proposed mathematical model based on angular multiplexing made it possible to synthesize the diffraction optical element for a new type of diffraction waveguide made from photo-thermo-refractive glass and to create a prototype with an angular resolution of at least 3.0 ± 0.5′, with a brightness change in the image of less than 20% and with a composite angular field of view of 32°.

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Section: Introductionmentioning

confidence: 99%

Selective Couplers Based on Multiplexed Volume Holographic Gratings for Waveguide Displays

et al. 2021

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Characterization of Volume Gratings Based on Distributed Dielectric Constant Model Using Mueller Matrix Ellipsometry

Jiang

et al. 2019

Applied Sciences

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Volume grating is a key optical component due to its comprehensive applications. Other than the common grating structures, volume grating is essentially a predesigned refractive index distribution recorded in materials, which raises the challenges of metrology. Although we have demonstrated the potential application of ellipsometry for volume grating characterization, it has been limited due to the absence of general forward model reflecting the refractive index distribution. Herein, we introduced a distributed dielectric constant based rigorous coupled-wave analysis (RCWA) model to interpret the interaction between the incident light and volume grating, with which the Mueller matrix can be calculated. Combining with a regression analysis with the objective to match the measured Mueller matrices with minimum mean square error (MSE), the parameters of the dielectric constant distribution function can be determined. The proposed method has been demonstrated using a series of simulations of measuring the volume gratings with different dielectric constant distribution functions. Further demonstration has been carried out by experimental measurements on volume holographic gratings recorded in the composite of polymer and zinc sulfide (ZnS) nanoparticles. By directly fitting the spatiotemporal concentration of the nanoparticles, the diffusion coefficient has been further evaluated, which is consistent to the result reported in our previous investigations.

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Thermal stability of volume Bragg gratings in chloride photo-thermo-refractive glass after femtosecond laser bleaching

Cited by 2 publications

References 26 publications

Selective Couplers Based on Multiplexed Volume Holographic Gratings for Waveguide Displays

Selective Couplers Based on Multiplexed Volume Holographic Gratings for Waveguide Displays

Characterization of Volume Gratings Based on Distributed Dielectric Constant Model Using Mueller Matrix Ellipsometry

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