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  • (PDF) Incoupling waveguide hologram with reduced ...

    Incoupling waveguide hologram with reduced polarization sensitivity (PDF) Incoupling waveguide hologram with reduced polarization sensitivity | Anders Larsson - Academia.edu Academia.edu no longer supports Internet Explorer.

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  • Coupling for capturing an displaying hologram

    2013-11-18 · Coupling for capturing an displaying hologram systems for real-time digital holographic... Porras-Aguilar, Rosario; Zaperty, Weronika; Kujawinska, Malgorzata 2013-11-18 00:00:00 Conventional (analog) holographic interferometry (HI) has been used as a powerful technique in optical metrology since sixties of XX century.

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  • OSA | Design of a high-resolution holographic

    The in-coupling holographic lens is designed to have the rolling grating vectors across the aperture, reducing the re-coupling and increasing the overall system efficiency. To ensure that all rays can propagate through the waveguide, the diffraction angles are designed to be larger than the total internal reflection angle (TIR) of the waveguide.

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  • Diffraction and coupling kinetics of photorefractive

    The coupling kinetics of a reflection-type photorefractive (PR) hologram are studied in this paper, in which we have found that the coupling between the adjacent channels increases as the reading time prolongs.

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  • High-luminance See-through Eyewear Display with Novel ...

    Figure 2 illustrates a new structure of a hologram waveguide of the eyewear display for presenting two in-coupling and one out-coupling reflection volume holograms. Basically, the in-coupling and...

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  • A high‐efficiency holographic waveguide display

    2014-2-21 · Abstract. Holographic waveguide display system with high efficiency is presented by embedding an in-coupling prism and an out-coupling reflective volume holographic element, which enables a small-type configuration. The improved coupling scheme can achieve 25% efficiency and the chromatic is corrected properly.

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  • OSA | Efficient coupling to a waveguide by combined ...

    2020-10-23 · A novel holographic grating for simultaneous coupling of power and optical beam splitting application is designed. The proposed design incorporates two ide Multifunctional holographic gratings for simultaneous coupling and beam splitting applications in photonic integrated circuits | SpringerLink

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  • Multifunctional holographic gratings for simultaneous ...

    The recorded hologram, analog or digital, can be used to reconstruct the original wavefront by illumination of the hologram with the reference wave. For an exact replica of the original wavefront to be reproduced, both the hologram and the reference beam must be the same as that used at the recording stage.

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  • Holography - an overview | ScienceDirect Topics

    2020-5-22 · A central-fed waveguide (shown as T-shaped one) generates forward- and backward-waves propagating along the right-hand side (RHS) and left-hand side (LHS), respectively. The ball …

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  • (PDF) Incoupling waveguide hologram with reduced ...

    Incoupling waveguide hologram with reduced polarization sensitivity. IEEE Photonics Technology Letters, 2000. Anders Larsson. Johan Backlund. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper.

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  • Diffraction and coupling kinetics of photorefractive

    1995-8-18 · The coupling kinetics of a reflection-type photorefractive (PR) hologram are studied in this paper, in which we have found that the coupling between the adjacent channels increases as the reading time prolongs. As long as the wavelength difference between the writing and reading beams is sufficiently large, there is only a small amount of ...

    Get Price
  • OSA | Coupling kinetics of the photorefractive hologram

    The coupling kinetics of a reflection-type photorefractive hologram are studied, and we have found that the coupling between the adjacent channels increases as the reading time is prolonged. Our study-shows that the reading beam is modulated by the grating in another channel for which it produces a weak backscattered light. As the backward-scattered light interacts with the reading beam, a new ...

    Get Price
  • Diffraction and coupling kinetics of photorefractive

    1995-8-18 · The coupling kinetics of a reflection-type photorefractive (PR) hologram are studied in this paper, in which we have found that the coupling between the adjacent channels increases as the reading time prolongs. As long as the wavelength difference between the writing and reading beams is sufficiently large, there is only a small amount of increase in coupling. However, as wavelength difference ...

    Get Price
  • [1605.02173] From strong to weak coupling in

    2016-5-7 · The dependence of the critical wave vector on the coupling implies that the range of validity of the hydrodynamic description increases monotonically with the coupling. The behavior of the quasinormal spectrum at large but finite coupling may be contrasted with the known properties of the hierarchy of relaxation times determined by the spectrum ...

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  • Real-time dynamic hologram in photorefractive ...

    2013-2-14 · Real-time dynamic hologram in photorefractive ferroelectric liquid crystal with two-beam coupling gain coefficient of over 800 cm –1 and response time of 8 ms

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  • Real-time dynamic hologram in photorefractive ...

    Real-time dynamic hologram in photorefractive ferroelectric liquid crystal with two-beam coupling gain coefficient of over 800cm–1 and response time of 8ms Takeo Sasaki,a) Masashi Ikegami ...

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  • Acoustic Holographic Cell Patterning in a

    2019-11-29 · A Petri dish containing single cells suspended in a cell culture medium is placed in direct contact with a water surface to provide acoustic coupling through the bottom wall. A 3D-printed acoustic hologram is put in contact with the transducer ( z = 0 mm) and both are positioned below the Petri dish such that a planar acoustic image forms in ...

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  • Holograms for acoustics | Nature

    P.M. Boone, in Encyclopedia of Materials: Science and Technology, 2001 1 Holography. Holography was born out of a challenging technological problem—the need to improve the resolution of the electron microscope, which was limited by the spherical aberration of the electron lenses. Since a long coherence length source is needed to record a hologram of an object, holography remained practically ...

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  • (PDF) Incoupling waveguide hologram with reduced ...

    Incoupling waveguide hologram with reduced polarization sensitivity. IEEE Photonics Technology Letters, 2000. Anders Larsson. Johan Backlund. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper.

    Get Price
  • OSA | Coupling kinetics of the photorefractive hologram

    The coupling kinetics of a reflection-type photorefractive hologram are studied, and we have found that the coupling between the adjacent channels increases as the reading time is prolonged. Our study-shows that the reading beam is modulated by the grating in another channel for which it produces a weak backscattered light. As the backward-scattered light interacts with the reading beam, a new ...

    Get Price
  • The validity of weak-coupling approach for a

    2012-3-1 · 1. Introduction. Volume holograms, also named as thick holograms, have been widely studied for the applications of holographic data storage (HDS) and holographic optical elements (HOEs) , , , , .Coupled wave theory (CWT) is the most famous method to analyze the diffraction efficiency of a volume hologram at both Bragg match and Bragg mismatch. In CWT the coupling between two plane waves is ...

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  • Real-time dynamic hologram in photorefractive ...

    2013-2-14 · Real-time dynamic hologram in photorefractive ferroelectric liquid crystal with two-beam coupling gain coefficient of over 800 cm –1 and response time of 8 ms

    Get Price
  • Acoustic Holographic Cell Patterning in a

    2019-11-29 · A Petri dish containing single cells suspended in a cell culture medium is placed in direct contact with a water surface to provide acoustic coupling through the bottom wall. A 3D-printed acoustic hologram is put in contact with the transducer ( z = 0 mm) and both are positioned below the Petri dish such that a planar acoustic image forms in ...

    Get Price
  • Holography - an overview | ScienceDirect Topics

    P.M. Boone, in Encyclopedia of Materials: Science and Technology, 2001 1 Holography. Holography was born out of a challenging technological problem—the need to improve the resolution of the electron microscope, which was limited by the spherical aberration of the electron lenses. Since a long coherence length source is needed to record a hologram of an object, holography remained practically ...

    Get Price
  • OSA | Design of a high-resolution holographic

    2021-7-16 · The eye-tracking system plays an essential role in the augmented reality (AR) eyewear. Waveguide volume holographic optical elements (HOE) that can be made with high efficiency, thin form, and lightweight are well-suited for this application. Traditional holographic lenses formed with spherical wavefronts at visible wavelengths and used for near-infrared (NIR) eye-tracking systems suffer from ...

    Get Price
  • Holograms for acoustics | Nature

    2016-5-18 · Holographic optical element has a high diffraction efficiency and a narrow-band frequency characteristic, and it has a characteristic that is able to implement several features in a single flat device. It is widely applied in various fields. In this chapter, the principle and characteristics of the holographic optical elements are described in detail, and few typical holographic optical ...

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  • Holographic Optical Elements and Application |

    2021-5-3 · The value of the coupling constant in our experiment is equal to −1.80 s -1. We have used COMSOL software to evaluate the eigenmode distribution of the 2D quasicrystals at 629.47 nm, as shown in the Fig. 4 (d). The red and blue colors in the simulated image indicate the lasing modes and 2D quasiperiodic geometry.

    Get Price
  • Coupling for capturing an displaying hologram

    2013-11-18 · Coupling for capturing an displaying hologram systems for real-time digital holographic... Porras-Aguilar, Rosario; Zaperty, Weronika; Kujawinska, Malgorzata 2013-11-18 00:00:00 Conventional (analog) holographic interferometry (HI) has been used as a powerful technique in optical metrology since sixties of XX century.

    Get Price
  • Diffraction and coupling kinetics of photorefractive

    The coupling kinetics of a reflection-type photorefractive (PR) hologram are studied in this paper, in which we have found that the coupling between the adjacent channels increases as the reading time prolongs. As long as the wavelength difference between the writing and reading beams is sufficiently large, there is only a small amount of increase in coupling.

    Get Price
  • A high‐efficiency holographic waveguide display

    2014-2-21 · Holographic waveguide display system with high efficiency is presented by embedding an in-coupling prism and an out-coupling reflective volume holographic element, which enables a small-type configuration. The improved coupling scheme can achieve 25% efficiency and the chromatic is corrected properly. Citing Literature.

    Get Price
  • Real-time dynamic hologram in photorefractive ...

    2013-2-14 · 2013-2-14 · Real-time dynamic hologram in photorefractive ferroelectric liquid crystal with two-beam coupling gain coefficient of over 800 cm –1 and response time of 8 ms

    Get Price
  • OSA | Design of a high-resolution holographic

    The out-coupling HOE diffracts the propagating rays in a direction perpendicular to the waveguide surface with a design efficiency goal of 50%. The in-coupling holographic lens is designed to have the rolling grating vectors across the aperture, reducing the re-coupling and increasing the overall system efficiency.

    Get Price
  • Efficient coupling to a waveguide by combined

    Gratings are widely used as coupling parts in a waveguide display system for achieving a much lighter and more compact system, but their diffraction efficiency needs to be improved. Two combined gratings for integrating a subwavelength binary grating and volume holographic grating (VHG) are applied …

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  • 8.4: Distinguished Paper: A Full Color Eyewear Display ...

    in-coupling G hologram layer interferes with the diffraction bandwidths of the out-coupling B and R hologram layers and has approximately 1.5% efficiencies. Consequently, the extra

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  • Acoustic Holographic Cell Patterning in a

    2019-11-29 · 2019-11-29 · A Petri dish containing single cells suspended in a cell culture medium is placed in direct contact with a water surface to provide acoustic coupling through the bottom wall. A 3D-printed acoustic hologram is put in contact with the transducer ( z = 0 mm) and both are positioned below the Petri dish such that a planar acoustic image forms in ...

    Get Price
  • OSA | Design of a high-resolution holographic

    2021-7-16 · 2021-7-16 · The eye-tracking system plays an essential role in the augmented reality (AR) eyewear. Waveguide volume holographic optical elements (HOE) that can be made with high efficiency, thin form, and lightweight are well-suited for this application. Traditional holographic lenses formed with spherical wavefronts at visible wavelengths and used for near-infrared (NIR) eye-tracking systems …

    Get Price
  • OSA | Colloidal quantum dots lasing and coupling in

    2021-5-3 · 2021-5-3 · The value of the coupling constant in our experiment is equal to −1.80 s -1. We have used COMSOL software to evaluate the eigenmode distribution of the 2D quasicrystals at 629.47 nm, as shown in the Fig. 4 (d). The red and blue colors in the simulated image indicate the lasing modes and 2D quasiperiodic geometry.

    Get Price
  • Holographic imaging of interlayer coupling in Co/Pt/NiFe

    2019-9-13 · Holographic imaging of interlayer coupling in Co/Pt/NiFe Thomas A Duckworth1,7, Feodor Y Ogrin1, Guillaume Beutier2, Sarnjeet S Dhesi3, Stuart A Cavill3, Sean Langridge4, Amy Whiteside5, Thomas Moore5, Maxime Dupraz2, Flora Yakhou6 and Gerrit van der Laan3 1 School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK 2 SIMaP, Grenoble-INP, CNRS, UJF, BP 75, …

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  • Phys. Rev. Lett. 119, 011601 (2017) - Coupling

    2017-7-6 · We initiate a holographic study of coupling-dependent heavy ion collisions by analyzing, for the first time, the effects of leading-order, inverse coupling constant corrections. In the dual description, this amounts to colliding gravitational shock waves in a theory with curvature-squared terms. We find that, at intermediate coupling, nuclei experience less stopping and have more energy ...

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  • Understanding Diffraction in Volume Gratings and

    2012-5-11 · The approach has its origins in the field of acousto-optics. The first wave is assumed to be the illuminating reference wave and the second wave is the hologram’s response or “signal” wave. The adoption of just two waves is made on the assumption that coupling …

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  • Frequency-multiplexed pure-phase microwave meta

    The sketch of the phase-only coding meta-hologram is depicted in Figure 1 (right side) in which to suppress the corner-related coupling effects, 2×2 identical coding particles are grouped to form the building supercells. The bi-spectral meta-hologram is composed of 20×20 digital supercells whereby the field intensities of two near-field ...

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  • Holographic Waveguide Periscopes in Augmented

    2020-12-8 · The negative influence of the third hologram manifests itself also in the fact that the field of vision of such schemes has a severe limitation on two coordinates; this is a consequence of the limitation on the range of light propagation angles in waveguide holographic periscopes and change in the direction of the waveguide model propagation by ...

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  • INTEGRAF | Medical Applications of Holography

    A X-ray hologram with a resolution better than that of a detector can be obtained by Fourier transform holography with a zone plate. The X-ray beam from a selenium X-ray laser (wavelength =20 nm, pulse length 200ps, output power 500 kW) falls on a narrow band X-ray mirror (bandwidth 10% and reflectivity 25% at 20nm wavelength) which reduces the ...

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  • Recent advances in metasurface hologram technologies ...

    holography, meta-hologram, Metasurface, nanophotonics, spatial light modulation 1 | INTRODUCTION Holography is an optical technology that records and recon-structs wavefronts of light analogously or digitally, and has exhibited potential for use in next‐generation imaging tech-nology with various applications such as three‐dimensional

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  • double slit experiment - Holograms and

    2019-2-8 · Next, a hologram may perfectly record, at an individual photon level, the output of a double slit without destroying the diffraction (answer referenced above); this is a known property used in analog optical processing for useful tasks. ... Suppose we relax the 'magic' of 'entanglement' to the simple case of a markov chain coupling: two ...

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  • Surface-Plasmon Holography - ScienceDirect

    2020-12-18 · (B) Plasmon hologram (corrugated metallic thin film) is sandwiched by dielectric photoresist hologram and high-index (SiO 2) thin film. Plasmon hologram follows the surface corrugation of photoresist hologram on the glass substrate. SiO 2 film works for enhancing the color separation as shown in the dispersion curve in the lower part.

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  • Holographic Projection Technology in the Field of

    2021-5-19 · The advent of the digital age has given new forms and new connotations to artistic creation, and more and more digital media technologies have entered the stage of artistic creation and exhibitions. At present, holographic projection technology has become a hot application technology in the field of digital media art. The purpose of this paper is to explore the technical principles of ...

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