Dr. Nikolai A. Khilo Profile

Dr. Nikolai A. Khilo

Scientific Researcher

SPIE Involvement:

Author

Publications (32)

Proceedings Article | 9 May 2011 Paper

Formation of TH- and TE-polarized Bessel light beams at acousto-optic diffraction in anisotropic crystals

Vladimir Belyi, Piotr Khilo, Elena Petrova, Nikolai Khilo, Nikolai Kazak

Proceedings Volume 8073, 807327 (2011) https://doi.org/10.1117/12.886443

KEYWORDS: Crystals, Acousto-optics, Diffraction, Bessel beams, Rubidium, Acoustics, Scattering, Laser crystals, Polarization, Laser scattering

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Proceedings Article | 9 May 2011 Paper

A speckle-photometry method of measurement of thermal diffusion coefficient of porous anodic alumina structures intended for optical sensing

N. Mukhurov, A. Maschenko, N. Khilo, P. Ropot

Proceedings Volume 8073, 80731B (2011) https://doi.org/10.1117/12.886348

KEYWORDS: Speckle, Diffusion, Optical testing, Correlation function, Distortion, Thermography, Statistical analysis, Laser beam diagnostics, Optical sensing, Process control

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A highly ordered structure and a relatively simple method of obtaining porous anodic alumina (PAA) have been attracting the attention of researchers to the potentialities of using such material in various fields of science and technology. The PAA- technology is oriented to mass production, does not require the use of expensive modern lithography and evaporation equipment. The technology makes it possible to produce PAA layers in a wide thickness range (0.1 - 800 μm) and with a spatially ordered system of pores whose diameter and periodicity can be changed within the range from tens to hundreds of nanometers. By filling nanopores with conductive, semiconductive and dielectric materials or their combinations, possibilities arise of making micro-sensors based on various physical, chemical and biological effects. For numerous applications, there is a promising development direction associated with modification of PAA structures with nano-diamonds. To control the modification process and for subsequent use of films in energyabsorbing sensor systems, a real-time measurement is required of their thermal and physical parameters, and, in particular, the coefficient of thermal diffusion (CTD). In this report an optical method for determining CTD is developed which is based on an analysis of the spatialtemporal dynamics of the speckle field. The proposed method for measuring the coefficient of thermal diffusion is based on the measurement of an average speed of the speckle-field movement along the specimen surface. Due to statistical nature of speckles, their movement must be also described statistically. Our approach consists in the use of correlation functions describing the degree of change in a speckle-image of some element of the surface in the process of heating or cooling. The proposed method is fully optical, fast, non-invasive and can be customized for specific applications. Optical measurement of CTD has been carried out for PAA structures both modified and not modified with nano-diamonds. High resolution allows one to measure spatial inhomogeneities of thermophysical properties of PAA- films.

SPIE Journal Paper | 1 May 2011

Propagation of high-order circularly polarized Bessel beams and vortex generation in uniaxial

Vladimir Belyi, Nikolai Khilo, Nikolai Kazak, Anatolii Ryzhevich, Andrew Forbes

OE, Vol. 50, Issue 05, 059001, (May 2011) https://doi.org/10.1117/12.10.1117/1.3572109

KEYWORDS: Crystals, Bessel beams, Laser crystals, Second-harmonic generation, Nonlinear crystals, Polarization, Superposition, Wave propagation, Optical engineering, Phase matching

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Proceedings Article | 28 February 2011 Paper

Conical and volumetric laser beams in laser technologies

Yu. Chivel, N. Khilo

Proceedings Volume 7996, 79960B (2011) https://doi.org/10.1117/12.887319

KEYWORDS: Spherical lenses, Pulsed laser operation, Laser development, Stanford Linear Collider, Laser applications, Laser systems engineering, Mirrors, Laser resonators, Resonators, Optical spheres

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Proceedings Article | 14 September 2010 Paper

A speckle-photometry method of measurement of thermal diffusion coefficient of thin multilayer and nanoporous structures

Nikolai Mukhurov, Nikolay Khilo, Alexander Maschenko

Proceedings Volume 7387, 738711 (2010) https://doi.org/10.1117/12.869942

KEYWORDS: Speckle, Diffusion, Multilayers, Thermography, Thin films, Correlation function, Optical testing, Laser beam diagnostics, Distance measurement, Interfaces

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Proceedings Article | 24 August 2009 Paper

Generation and propagation of high-order Bessel vortices in linear and non-linear crystals

Vladimir Belyi, Nikolai Khilo, Andrew Forbes, Anatol Ryzhevich

Proceedings Volume 7430, 74300F (2009) https://doi.org/10.1117/12.824851

KEYWORDS: Crystals, Bessel beams, Laser crystals, Second-harmonic generation, Nonlinear crystals, Crystal optics, Polarization, Bessel functions, Superposition, Wavefronts

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Proceedings Article | 24 August 2009 Paper

Superpositions of higher-order Bessel beams and nondiffracting speckle fields

Angela Dudley, Ruslan Vasilyeu, Andrew Forbes, Nikolai Khilo, Petr Ropot, Vladimir Belyi, Nikolai Kazak

Proceedings Volume 7430, 74300A (2009) https://doi.org/10.1117/12.826884

KEYWORDS: Bessel beams, Superposition, Speckle, Spatial light modulators, Computer generated holography, Distance measurement, LCDs, Holograms, Wave propagation, Physics

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Proceedings Article | 22 August 2009 Paper

Investigation of local spatial spectra of Bessel light-beams

Vladimir Belyi, Nikolai Kazak, Nikolai Khilo, Andrew Forbes, Piotr Ropot

Proceedings Volume 7430, 743011 (2009) https://doi.org/10.1117/12.824854

KEYWORDS: Bessel beams, Axicons, Superposition, Diffraction, Bessel functions, Particles, Spatial frequencies, Modulation, Physics, Transform theory

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Proceedings Article | 22 August 2009 Paper

Intracavity generation of longitudinal dependant Bessel like beams

I. Litvin, N. Khilo, A. Forbes, V. Belyi

Proceedings Volume 7430, 743010 (2009) https://doi.org/10.1117/12.827971

KEYWORDS: Resonators, Mirrors, Axicons, Monochromatic aberrations, Bessel beams, Telescopes, Beam propagation method, Gaussian beams, Lenses, Beam shaping

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Proceedings Article | 22 August 2009 Paper

Bessel-like beams with z-dependent cone angles

Vladimir Belyi, Andrew Forbes, Nikolai Kazak, Nikolai Khilo, Piotr Ropot

Proceedings Volume 7430, 74300E (2009) https://doi.org/10.1117/12.824687

KEYWORDS: Axicons, Gaussian beams, Bessel beams, Diffraction, Bessel functions, Monochromatic aberrations, Spherical lenses, Beam propagation method, Wavefronts, Physics

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Proceedings Article | 27 July 2007 Paper

Vortex structure of elongated speckles

Vladimir Belyi, Nikolay Kazak, Nikolai Khilo, Piotr Ropot

Proceedings Volume 6729, 67290C (2007) https://doi.org/10.1117/12.751866

KEYWORDS: Speckle, Bessel beams, Superposition, Modulation, Wavefronts, Gaussian beams, Spherical lenses, Speckle pattern, Correlation function, Nondestructive evaluation

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Proceedings Article | 18 June 2007 Paper

Conical beam-based laser profilometer for testing roller bearings

Nikolai Khilo, Vladimir Belyi, Nikolai Kazak, Aleksander Mashchenko, Piotr Ropot

Proceedings Volume 6616, 66162L (2007) https://doi.org/10.1117/12.724476

KEYWORDS: Profilometers, Axicons, Edge detection, Modulation, Image processing, Phase shifts, Charge-coupled devices, Gaussian beams, Speckle, Superposition

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In the last years the investigations in the area of optics of Bessel and their associated conical beams are being shifted from the domain of scientific research to the one of practical applications. This is appreciably due to new potentialities of the practical use of these light fields, which are not realizable in the framework of traditional optics of Gaussian beams. The spatio-angular properties of conical light beams are optimal to control the form and quality of surfaces close to cylindrical and conical ones. This is related to the fact that a conical light beam enables one to realize the longitudinally uniform illumination at a certain angle. The grazing-incidence geometry of illumination permits one to significantly reduce the speckle noise in the field reflected and to extract, thereby, information on the macroscopic shape of the surfaces. In this work we develop two optical profilometers intended for non-destructive testing of objects having the form close to the cylindrical one. In particular, a new scheme of vibration-proof laser profilometer based on using the superposition of two conical beams is proposed. A laboratory optical setup of the profilometer is designed. The developed device includes two ring diaphragm as a basic element for crating two conical light beams. One of these beams serves as a reference beam and the second - as an object one. As a result, the independent reference arm has been removed and a single-arm scheme has been realized. The conical beams are spatially separated so that one beam illuminates the cylindrical surface and another beam is freely propagates. Due to a single-arm configuration, this profilometer is noted for a high mechanical stability. The experimental testing of the laboratory setup has confirmed this property of the device. The methods of eliminating the systematic errors and the misalignment aberrations are developed. The conical beam - based profilometer applies to controlling various cylindrical and conical samples including the roller bearings. It is shown that the single-arm profilometer is suitable for testing the roller bearings, because it is vibration-proof and also provides an enough measuring accuracy. Besides, this type of profilometers is not time consuming, which allows the online control of bearings.

Proceedings Article | 15 September 2006 Paper

Influence of scattering media on the regular structure and speckle of quasi-nondiffractive Bessel light beams

Vladimir Belyi, Nikolai Kazak, Nikolai Khilo, Larisa Kramoreva, Aleksandr Mashchenko, Piotr Ropot, Vladimir Yushkevich

Proceedings Volume 6341, 63412O (2006) https://doi.org/10.1117/12.695855

KEYWORDS: Bessel beams, Scattering, Scattering media, Laser scattering, Particles, Speckle, Spherical lenses, Gaussian beams, Beam propagation method, Modulation

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Proceedings Article | 9 June 2006 Paper

Formation of radially and azimuthally polarized Bessel light beams at interaction with layered periodic anisotropic media

S. Kurilkina, N. Kazak, V. Belyi, N. Khilo

Proceedings Volume 6258, 62580F (2006) https://doi.org/10.1117/12.677091

KEYWORDS: Crystals, Transmittance, Radon, Crystal optics, Refractive index, Picosecond phenomena, Polarization, Laser crystals, Process control, Diffraction

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Proceedings Article | 15 October 2005 Paper

Bessel beam based optical profilometry

V. Belyi, M. Kroening, N. Kazak, N. Khilo, A. Mashchenko, P. Ropot

Proceedings Volume 5964, 59640L (2005) https://doi.org/10.1117/12.624491

KEYWORDS: Profilometers, Diffraction, Axicons, Bessel beams, Charge-coupled devices, Nondestructive evaluation, Beam shaping, Geometrical optics, Superposition

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Proceedings Article | 15 October 2005 Paper

Formation of radially and azimuthally polarized Bessel light beams under the interaction with a layered-periodical medium having defect inclusions

Svetlana Kurilkina, Michael Kroening, Nikolai Kazak, Vladimir Belyi, Nikolai Khilo

Proceedings Volume 5962, 59622S (2005) https://doi.org/10.1117/12.624483

KEYWORDS: Crystals, Polarization, Bessel beams, Radon, Superposition, Refractive index, Axicons, Anisotropy, Magnetism, Laser crystals

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Proceedings Article | 24 July 2002 Paper

Second harmonic generation by a quadribeam

Nikolai Kazak, N. Khilo, Evgeni Katranji, Anatol Ryzhevich

Proceedings Volume 4751, (2002) https://doi.org/10.1117/12.475894

KEYWORDS: Gaussian beams, Diffraction, Second-harmonic generation, Nonlinear crystals, Harmonic generation, Polarization, Axicons, Optical components, Data processing, Spatial frequencies

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Proceedings Article | 24 July 2002 Paper

Second-harmonic generation with elliptical Bessel beams

Vladimir Belyi, Nikolay Khilo, Elena Petrova, Aleksander Mashchenko, V. Leparskii

Proceedings Volume 4751, (2002) https://doi.org/10.1117/12.475893

KEYWORDS: Crystals, Bessel beams, Harmonic generation, Laser crystals, Bessel functions, Maxwell's equations, Polarization, Beam propagation method, Nonlinear crystals, Crystal optics

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Proceedings Article | 24 July 2002 Paper

Modal theory and output patterns of Stokes radiation in SRS: generation at pump with Bessel light beams

Vladimir Belyi, Nikolay Khilo, Valentin Orlovich, A. Grabtchikov, R. Chulkov, V. Lisinetskii

Proceedings Volume 4751, (2002) https://doi.org/10.1117/12.475937

KEYWORDS: Bessel beams, Superposition, Diffraction, Raman spectroscopy, Gaussian beams, Hydrogen, Telescopes, Axicons, Waveguides, Spatial frequencies

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Proceedings Article | 30 April 2002 Paper

Methods of formation and conversion of Bessel light beams with wavefront dislocations and applications for optical information processing

V. Belyi, Nikolai Kazak, Nikolay Khilo, Anatol Ryzhevich

Proceedings Volume 4644, (2002) https://doi.org/10.1117/12.464184

KEYWORDS: Bessel beams, Crystals, Laser crystals, Wavefronts, Gaussian beams, Axicons, Polarization, Superposition, Ferroelectric materials, Bessel functions

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Proceedings Article | 30 April 2002 Paper

Methods of formation of gradient light fields

Anatol Ryzhevich, Nikolai Kazak, Evgeni Katranji, N. Khilo

Proceedings Volume 4644, (2002) https://doi.org/10.1117/12.464190

KEYWORDS: Axicons, Crystals, Laser crystals, Collimation, Chemical species, Optical components, Gaussian beams, Modulation, Optical signal processing, Particles

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Proceedings Article | 10 August 2001 Paper

Simple method of laser beam quality analysis

Anatol Ryzhevich, Nikolai Kazak, Nikolay Khilo, A. Khilo

Proceedings Volume 4517, (2001) https://doi.org/10.1117/12.435959

KEYWORDS: Axicons, Beam analyzers, Gaussian beams, Distortion, Bessel functions, Amplifiers, Bessel beams, Laser development, Telescopes, Microscopes

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Proceedings Article | 10 August 2001 Paper

Evanescent Bessel light beams

Andrey Goncharenko, Nikolay Khilo, Elena Petrova

Proceedings Volume 4517, (2001) https://doi.org/10.1117/12.435956

KEYWORDS: Polarization, Bessel beams, Maxwell's equations, Magnetism, Composites, Reflection, Superposition, Bessel functions, Radiation effects, Optical microscopy

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Proceedings Article | 30 May 2001 Paper

Methods of formation and nonlinear conversion of Bessel optical vortices

V. Belyi, Terence King, Nikolai Kazak, Nikolay Khilo, Evgeni Katranji, Anatol Ryzhevich

Proceedings Volume 4403, (2001) https://doi.org/10.1117/12.428272

KEYWORDS: Crystals, Bessel beams, Laser crystals, Polarization, Optical vortices, Gaussian beams, Axicons, Superposition, Nonlinear crystals, Ferroelectric materials

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Proceedings Article | 15 March 2001 Paper

Optically controlled rotation of multibeam light field

Peter Khilo, Larisa Kramoreva, Nikolay Khilo

Proceedings Volume 4358, (2001) https://doi.org/10.1117/12.418863

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Proceedings Article | 15 March 2001 Paper

Surface Bessel light beams

Andrey Goncharenko, Nikolay Khilo, Elena Petrova

Proceedings Volume 4358, (2001) https://doi.org/10.1117/12.418862

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Proceedings Article | 2 March 2001 Paper

Resonator with Bessel-Gauss modes

Nikolay Khilo, Evgeni Katranji, Anatol Ryzhevich

Proceedings Volume 4353, (2001) https://doi.org/10.1117/12.417730

KEYWORDS: Resonators, Mirrors, Axicons, Diffraction, Bessel beams, Spherical lenses, Laser resonators, Optical components, Optical resonators, Gaussian beams

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Proceedings Article | 2 March 2001 Paper

Creation and annihilation of wavefront dislocations in the process of frequency doubling of Bessel light beams

V. Belyi, Nikolai Kazak, Nikolay Khilo, Anatol Ryzhevich, Evgeni Katranji

Proceedings Volume 4353, (2001) https://doi.org/10.1117/12.417729

KEYWORDS: Bessel beams, Wavefronts, Superposition, Harmonic generation, Second-harmonic generation, Bessel functions, Crystals, Ferroelectric materials, Physics, Nonlinear optics

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Proceedings Article | 2 March 2001 Paper

New method of formation of high-order Bessel light beams using biaxial crystals

Nikolai Kazak, Nikolay Khilo, Evgeni Katranji, Anatol Ryzhevich

Proceedings Volume 4353, (2001) https://doi.org/10.1117/12.417731

KEYWORDS: Crystals, Laser crystals, Polarization, Bessel beams, Gaussian beams, Bessel functions, Axicons, Wavefronts, Superposition, Refraction

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Proceedings Article | 6 January 1999 Paper

Peculiarities of parametric frequency conversion at pumping by a Bessel light beam

V. Belyi, Nikolay Khilo

Proceedings Volume 3685, (1999) https://doi.org/10.1117/12.335827

KEYWORDS: Bessel beams, Polarization, Gaussian beams, Crystals, Bessel functions, Optical parametric oscillators, Nonlinear optics, Laser crystals, Ferroelectric materials, Frequency conversion

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Proceedings Article | 20 May 1996 Paper

Diffractionless light beams in linear and nonlinear optics

V. Belyi, Nikolai Kazak, V. Pavlenko, Nikolay Khilo, Antoliy Khatkevich

Proceedings Volume 2800, (1996) https://doi.org/10.1117/12.240516

KEYWORDS: Crystals, Laser crystals, Spatial solitons, Diffraction gratings, Light wave propagation, Gaussian beams, Diffraction, Geometrical optics, Beam propagation method, Nonlinear optics

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Proceedings Article | 28 June 1993 Paper

Method for forming laser beams with uniform-output amplitude distribution

Andrey Goncharenko, Nikolay Khilo, N. Korneyev

Proceedings Volume 1807, (1993) https://doi.org/10.1117/12.147935

KEYWORDS: Resonators, Diffraction gratings, Waveguides, Mirrors, Fourier transforms, Optical resonators, Switching, Americium, Information technology, Optical signal processing

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Showing 5 of 32 publications

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