Prof. František Uherek Profile

Prof. František Uherek

at International Laser Ctr of SCSTI

SPIE Involvement:

Author

Publications (38)

Proceedings Article | 13 December 2022 Paper

Design of 256-channel 25-GHz AWG for ultra-dense wavelength division multiplexing

D. Seyringer, Stanislava Serecunova, František Uherek, Heinz Seyringer

Proceedings Volume 12502, 125020H (2022) https://doi.org/10.1117/12.2663317

KEYWORDS: Waveguides, Phased arrays, Phased array optics, Wavelength division multiplexing, Dense wavelength division multiplexing, Photonics, Optical design

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Proceedings Article | 13 December 2022 Paper

Comparison of optical properties of 1×8 Y-branch and MMI splitter based on silicon nitride material platform

S. Serecunova, D. Seyringer, F. Uherek, J. Chovan, H. Seyringer

Proceedings Volume 12502, 125020F (2022) https://doi.org/10.1117/12.2662002

KEYWORDS: Waveguides, Polarization, Silicon, Signal attenuation, Optical properties, Optical simulations, Geometrical optics, Photonics, Beam splitters

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Proceedings Article | 4 March 2022 Presentation + Paper

Two all-optical switching schemes of 1560 nm femtosecond pulses using soft glass asymmetric dual-core fibers

Mattia Longobucco, Ignas Astrauskas, Audrius Pugžlys, Nhat Thai Dang, Dariusz Pysz, František Uherek, Andrius Baltuška, Ryszard Buczyński, Ignác Bugár

Proceedings Volume 11997, 119970N (2022) https://doi.org/10.1117/12.2605548

KEYWORDS: Switching, Optical fibers, Glasses, Femtosecond phenomena, Refractive index, Wave propagation, Solids, Photonics, Fiber couplers, Directional couplers, Nonlinear optical glasses, Nonlinear optics, All optical signal processing

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Proceedings Article | 5 March 2021 Poster + Presentation + Paper

Comparison of optical properties of 1x128 splitters based on Y-branch and MMI approaches

S. Serecunova, D. Seyringer, F. Uherek, H. Seyriger

Proceedings Volume 11682, 116821N (2021) https://doi.org/10.1117/12.2582994

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Proceedings Article | 9 May 2018 Presentation + Paper

Towards ultrafast subnanojoule solitonic nonlinear directional coupler based on soft glass dual-core photonics crystal fibers

Ľubomír Čurilla, Ignas Astrauskas, Audrius Pugžlys, Pavol Stajanča, František Uherek, Dariusz Pysz, Andrius Baltuška, Ignác Bugár

Proceedings Volume 10681, 106810I (2018) https://doi.org/10.1117/12.2315256

KEYWORDS: Switching, Optical fibers, Glasses, Solitons, Photonic crystal fibers, Ultrafast phenomena, Wave propagation, Directional couplers, Femtosecond phenomena, Dispersion

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Proceedings Article | 1 December 2017 Paper

Surface photonic crystal structures for LED emission modification

Frantisek Uherek, Jaroslava Škriniarová, Anton Kuzma, Ľuboš Šušlik, Ivana Lettrichova, Dong Wang, Peter Schaaf

Proceedings Volume 10603, 1060319 (2017) https://doi.org/10.1117/12.2293527

KEYWORDS: Light emitting diodes, Photonic crystals, Optical lithography, Photonics

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Proceedings Article | 1 December 2017 Paper

Design, fabrication and characterization of SiOx/SiON/SiO2/Si structures for passive optical waveguides realization

J. Chovan, D. Figura, J. Chlpík, D. Lorenc, V. Řeháček, F. Uherek

Proceedings Volume 10603, 106030N (2017) https://doi.org/10.1117/12.2295305

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Proceedings Article | 23 December 2016 Paper

Polymeric slot waveguide for photonics sensing

J. Chovan, F. Uherek

Proceedings Volume 10142, 101420P (2016) https://doi.org/10.1117/12.2263094

KEYWORDS: Waveguides, Polymers, Polymer multimode waveguides, Refractive index, Coating, Photonics, Sensors, Cladding, Photorefractive polymers, Polymeric sensors

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Proceedings Article | 28 August 2015 Paper

Fabrication of plasmonic thin films and their characterization by optical method and FDTD simulation technique

A. Kuzma, F. Uherek, J. Škriniarová, D. Pudiš, M. Weis, M. Donoval

Proceedings Volume 9547, 954739 (2015) https://doi.org/10.1117/12.2188190

KEYWORDS: Nanoparticles, Finite-difference time-domain method, Plasmonics, Thin films, Atomic force microscopy, Metals, Gold, Surface plasmons, Glasses, Scanning electron microscopy

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Proceedings Article | 5 December 2014 Paper

Dual-core microstructure optical fiber as a potential polarization splitter

Lubomir Curilla, Pavol Stajanca, Ignac Bugar, Ryszard Buczynski, Frantisek Uherek

Proceedings Volume 9441, 94411D (2014) https://doi.org/10.1117/12.2087316

KEYWORDS: Polarization, Optical testing, Mineralogy, Polarizers, Micro optical fluidics, Cameras, Optical fibers, Refractive index, Femtosecond phenomena, Molybdenum

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Proceedings Article | 5 December 2014 Paper

Optical investigation of the AlGaAs/GaAs LED with photonic structures patterned by the EBDW lithography

P. Hronec, F. Uherek, J. Škriniarová, J. Kováč, D. Pudiš, R. Andok

Proceedings Volume 9441, 94411T (2014) https://doi.org/10.1117/12.2087770

KEYWORDS: Light emitting diodes, Electron beam direct write lithography, Photonic crystals, Etching, Integrating spheres, Gallium arsenide, Electron beam lithography, Optical testing, Edge emitting semiconductor lasers, Near field optics

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SPIE Journal Paper | 21 January 2014

Design, simulation, evaluation, and technological verification of arrayed waveguide gratings

Dana Seyringer, Patrick Schmid, Michal Bielik, František Uherek, Jozef Chovan, Anton Kuzma

OE, Vol. 53, Issue 07, 071803, (January 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.7.071803

KEYWORDS: Photonics, Optical design, Waveguides, Demultiplexers, Geometrical optics

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Proceedings Article | 11 October 2013 Paper

Surface plasmon resonance of gold and silver nanoparticle monolayers: effect of coupling and surface oxides

Anton Kuzma, Jozef Chovan, František Uherek, Martin Weis

Proceedings Volume 8915, 89151N (2013) https://doi.org/10.1117/12.2033646

KEYWORDS: Neptunium, Silver, Refractive index, Gold, Plasmonics, Oxides, Nanoparticles, Finite-difference time-domain method, Dielectrics, Surface plasmons

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Proceedings Article | 11 October 2013 Paper

Design and simulation of apodized SOI fibre-to-chip coupler by subwavelength structure

Jozef Chovan, Anton Kuzma, František Uherek, Dana Seyringer

Proceedings Volume 8915, 89150P (2013) https://doi.org/10.1117/12.2036067

KEYWORDS: Apodization, Waveguides, Fiber couplers, Diffraction gratings, Optical design, Structured optical fibers, Refractive index, Silicon, Optical fibers, Optical simulations

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Proceedings Article | 11 September 2013 Paper

Effect of metal arrangement on localized surface plasmon polaritons in bimetallic nanoparticles

Anton Kuzma, Martin Weis, Jozef Chovan, František Uherek

Proceedings Volume 8809, 88092A (2013) https://doi.org/10.1117/12.2026595

KEYWORDS: Nanoparticles, Silver, Gold, Metals, Plasmonics, Finite-difference time-domain method, Optical testing, Particles, Mineralogy, Surface plasmon polaritons

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Proceedings Article | 18 December 2012 Paper

Design and Simulation of a Fiber to Chip Coupler Designed on SOI Platform with Subwavelength Grating

Jozef Chovan, Anton Kuzma, František Uherek

Proceedings Volume 8697, 86971S (2012) https://doi.org/10.1117/12.2007017

KEYWORDS: Diffraction gratings, Waveguides, Fiber couplers, Optical design, Refractive index, Silicon, Optical fibers, Optical simulations, Fiber to the x, Single mode fibers

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Proceedings Article | 18 December 2012 Paper

Design of an optical power splitter with integrated two-dimensional photonic crystal

Anton Kuzma, Jozef Chovan, František Uherek

Proceedings Volume 8697, 869720 (2012) https://doi.org/10.1117/12.2007288

KEYWORDS: Integrated optics, Waveguides, Photonic crystals, Beam propagation method, Optical design, Refractive index, Deep ultraviolet, Lithography, Gallium arsenide, Planar waveguides

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Proceedings Article | 15 December 2010 Paper

Supercontinuum generation in dual core photonic crystal fiber

M. Koys, I. Bugar, V. Mesároš, F. Uherek, R. Buczynski

Proceedings Volume 7746, 774611 (2010) https://doi.org/10.1117/12.882890

KEYWORDS: Optical fibers, Dispersion, Polarization, Supercontinuum generation, Raman scattering, Cameras, Photonic crystal fibers, Wave propagation, Solitons, Raman spectroscopy

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Proceedings Article | 15 December 2010 Paper

Optical data storage for high-speed data processing and archiving

M. Boldis, F. Uherek, J. Chovan

Proceedings Volume 7746, 77461S (2010) https://doi.org/10.1117/12.881419

KEYWORDS: Optical storage, Holography, Networks, Data archive systems, Data storage, Data processing, Crystals, Telecommunications, Internet, Ultraviolet radiation

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Proceedings Article | 18 November 2008 Paper

Structural and optical characterization of photonics structures prepared by nanoimprint technology

Daniel Hasko, Jaroslav Kovác, Alexander Satka, Milan Drzík, Frantisek Uherek, Graham Hubbard, Duncan W. Allsopp

Proceedings Volume 7138, 713824 (2008) https://doi.org/10.1117/12.818074

KEYWORDS: Photoresist materials, Semiconducting wafers, Eye, Diffraction, Photonics, Nanostructures, Silicon, Scanning electron microscopy, Atomic force microscopy, Ultraviolet radiation

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Proceedings Article | 21 April 2008 Paper

Solitonic spectral transformations in double core photonic crystal fiber

I. Bugar, I. Fedotov, A. Fedotov, J. Chlpik, D. Lorenc, R. Buczynski, D. Pysz, F. Uherek, A. Zheltikov

Proceedings Volume 6990, 69900R (2008) https://doi.org/10.1117/12.783331

KEYWORDS: Polarization, Visible radiation, Solitons, Dispersion, Femtosecond phenomena, Wave propagation, Glasses, Inspection, Feature extraction, Supercontinuum generation

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Proceedings Article | 8 May 2007 Paper

Nonlinear frequency conversion in double core photonic crystal fibers

I. Bugar, D. Lorenc, I. Fedotov, A. Fedotov, R. Buczynski, D. Pysz, F. Uherek, A. Zheltikov

Proceedings Volume 6582, 658216 (2007) https://doi.org/10.1117/12.725051

KEYWORDS: Polarization, Femtosecond phenomena, Dispersion, Solitons, Photonic crystal fibers, Structured optical fibers, Spectroscopy, Supercontinuum generation, Fiber couplers, Crystals

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Proceedings Article | 12 April 2007 Paper

Adaptively controlled supercontinuum generation in a microstructure fiber

D. Lorenc, D. Velic, F. Uherek, A. Markevitch, R. Levis

Proceedings Volume 6609, 66090G (2007) https://doi.org/10.1117/12.739494

KEYWORDS: Solitons, Photonic crystal fibers, Supercontinuum generation, Pulse shaping, Nonlinear dynamics, Pulsed laser operation, Femtosecond phenomena, Fiber lasers, Evolutionary algorithms, Laser systems engineering

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Proceedings Article | 9 April 2007 Paper

Nonlinear microstructured fibers for supercontinuum generation

Ryszard Buczyński, Dusan Lorenc, Ignac Bugar, Jakub Korzeniowski, Dariusz Pysz, Ireneusz Kujawa, Frantisek Uherek, Ryszard Stępień

Proceedings Volume 6608, 660805 (2007) https://doi.org/10.1117/12.739319

KEYWORDS: Optical fibers, Supercontinuum generation, Glasses, Refractive index, Dispersion, Seaborgium, Polarization, Photonic crystal fibers, Silica, Lead

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Proceedings Article | 6 December 2006 Paper

Study of resonant and nonresonant nonlinear phenomena using femtosecond Cr:Forsterite laser

D. Lorenc, I. Bugar, F. Uherek

Proceedings Volume 5945, 594516 (2006) https://doi.org/10.1117/12.638952

KEYWORDS: Absorption, Luminescence, Refractive index, Nonlinear optics, Refraction, Transmittance, Polymers, Gallium arsenide, Dispersion, Femtosecond phenomena

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Proceedings Article | 6 December 2006 Paper

Multiple-access interference in 2-D wavelength/time optical CDMA system with optical hard-limiters

Jozef Chovan, František Uherek

Proceedings Volume 5945, 59450M (2006) https://doi.org/10.1117/12.638920

KEYWORDS: Active optics, Computer programming, Code division multiplexing, Computer simulations, Stars, Receivers, Optical networks, Rectangular pulse, Monochromatic aberrations, Laser applications

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Proceedings Article | 12 October 2005 Paper

Nonlinear spectral shifts in multimode photonic-cystal fibers induced by femtosecond Cr:Forsterite oscillator

D. Lorenc, I. Bugar, F. Uherek, A. Zheltikov

Proceedings Volume 5950, 595013 (2005) https://doi.org/10.1117/12.623127

KEYWORDS: Polarization, Multimode fibers, Oscillators, Femtosecond phenomena, Dispersion, Infrared radiation, Photonic crystal fibers, Harmonic generation, Spectroscopy, Phase matching

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Proceedings Article | 7 October 2005 Paper

Numerical simulation of data transmission in 2D W/T optical CDMA system with optical hard-limiters

J. Chovan, F. Uherek

Proceedings Volume 5948, 59481P (2005) https://doi.org/10.1117/12.622845

KEYWORDS: Information technology, Receivers, Data transmission, Active optics, Avalanche photodetectors, Photons, Numerical simulations, Computer simulations, Stars, Transmitters

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Proceedings Article | 21 June 2004 Paper

Pulsed laser deposition of ZnO: comparison between deposition from Zn and ZnO target

Jaroslav Bruncko, Miroslav Michalka, Frantisek Uherek

Proceedings Volume 5449, (2004) https://doi.org/10.1117/12.563094

KEYWORDS: Zinc oxide, Zinc, Pulsed laser deposition, Scanning electron microscopy, Atomic force microscopy, Absorption, Excitons, Sapphire, Near ultraviolet, Thin films

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Proceedings Article | 21 June 2004 Paper

Comparison of growth rate, roughness, and surface morphology of Cu and W thin films prepared by pulsed laser deposition

Miroslav Michalka, Frantisek Uherek, Jaroslav Bruncko

Proceedings Volume 5449, (2004) https://doi.org/10.1117/12.563095

KEYWORDS: Copper, Thin films, Pulsed laser deposition, Scanning electron microscopy, Radium, Silicon films, Metals, Thin film growth, Silicon, Nd:YAG lasers

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Proceedings Article | 8 July 2003 Paper

Monitoring of laser welding processes by optical emission spectroscopy

Jaroslav Bruncko, Frantisek Uherek, Miroslav Michalka

Proceedings Volume 5036, (2003) https://doi.org/10.1117/12.498245

KEYWORDS: Laser welding, Plasma, Emission spectroscopy, Spectrometers, Laser processing, Computing systems, Carbon dioxide lasers, Laser spectroscopy, Laser induced plasma spectroscopy, Laser applications

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Proceedings Article | 30 April 2002 Paper

Spectroscopic investigation of laser-induced plasma in laser beam welding

J. Bruncko, Frantisek Uherek, Dusan Chorvat, Miroslav Michalka, P. Fodrek

Proceedings Volume 4644, (2002) https://doi.org/10.1117/12.464119

KEYWORDS: Laser welding, Plasma, Laser spectroscopy, Spectroscopy, Laser induced plasma spectroscopy, Argon, Diagnostics, Solids, Laser beam diagnostics, Carbon dioxide lasers

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Proceedings Article | 4 May 2001 Paper

Imaging of mouse aorta using OCT

Anton Mateasik, Frantisek Uherek, Dusan Chorvat, D. Tazka, J. Kyselovic

Proceedings Volume 4241, (2001) https://doi.org/10.1117/12.431515

KEYWORDS: Optical coherence tomography, Optical microscopy, 3D image processing, 3D modeling, Image resolution, Visualization, Aluminum, Laser scanners, 3D scanning, Data modeling

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Proceedings Article | 7 March 2001 Paper

Semiconductor laser longitudinal mode structure study by high-resolution spectroscopy

Ladislav Kuna, Frantisek Uherek

Proceedings Volume 4356, (2001) https://doi.org/10.1117/12.417843

KEYWORDS: Semiconductor lasers, Spectral resolution, Diagnostics, Spectroscopy, Monochromators, Fabry–Perot interferometers, Gallium arsenide, Optical amplifiers, Laser applications, Laser development

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Proceedings Article | 7 March 2001 Paper

Modeling and numerical simulation of the optical intensity distribution in double-heterostructure semiconductor lasers

Ladislav Kuna, Frantisek Uherek

Proceedings Volume 4356, (2001) https://doi.org/10.1117/12.417842

KEYWORDS: Semiconductor lasers, Waveguides, Optical simulations, Gallium arsenide, Dielectrics, Active optics, 3D vision, Integrated optics, Numerical simulations, Device simulation

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Proceedings Article | 14 July 1999 Paper

Design of multilayer optoelectronic devices

Jurana Borgulova, Frantisek Uherek, Jaroslav Kovac, Alexander Satka

Proceedings Volume 3820, (1999) https://doi.org/10.1117/12.353064

KEYWORDS: Absorption, Reflectivity, PIN photodiodes, Photodetectors, Optical properties, Structural design, Mirrors, Optoelectronic devices, Photodiodes, Reflectors

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Proceedings Article | 20 January 1999 Paper

Application of lasers in diamond film processing

Miroslav Michalka, Frantisek Uherek, A. Kromka

Proceedings Volume 3688, (1999) https://doi.org/10.1117/12.337534

KEYWORDS: Diamond, Laser processing, Chemical vapor deposition, Raman spectroscopy, Laser ablation, Carbon, Silicon, Laser applications, Silicon carbide, Laser cutting

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