Prof. Otakar Wilfert Profile

Prof. Otakar Wilfert

Professor at Brno Univ of Technology

SPIE Involvement:

Author

Publications (24)

Proceedings Article | 6 October 2015 Paper

Different atmospheric effects causing FSO link attenuation: experimental results and modelling in Czech Republic

Ondrej Fiser, Vladimir Brazda, Otakar Wilfert

Proceedings Volume 9614, 96140D (2015) https://doi.org/10.1117/12.2188348

KEYWORDS: Signal attenuation, Free space optics, Fiber optic gyroscopes, Visibility, Visibility through fog, Clouds, Sensors, Observatories, Humidity, Environmental sensing

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Proceedings Article | 26 February 2014 Paper

Analysis of thermal effects in endoscopic nanocarriers-based photodynamic therapy applied to esophageal diseases

I. Salas-García, F. Fanjul-Vélez, N. Ortega-Quijano, O. Wilfert, L. Hudcova, J. Poliak, P. Barcik, J. Arce-Diego

Proceedings Volume 8941, 89410C (2014) https://doi.org/10.1117/12.2039209

KEYWORDS: Nanoparticles, Tissue optics, Gold, Tumor growth modeling, Tissues, Photodynamic therapy, Absorption, Scattering, Thermal effects, Stomach

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Proceedings Article | 25 September 2013 Paper

Comparison and evaluation of the laser beam-shaping techniques

Peter Barcik, Lucie Hudcova, Otakar Wilfert, Jose Arce-Diego, Felix Fanjul-Velez, Irene Salas-Garcia, Noe Ortega-Quijano

Proceedings Volume 8874, 88740E (2013) https://doi.org/10.1117/12.2023213

KEYWORDS: Beam shaping, Gaussian beams, Free space optics, Atmospheric turbulence, Optical testing, Ocean optics, Atmospheric optics, Laser sources, Transmitters, Semiconductor lasers

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Proceedings Article | 25 September 2013 Paper

Detection of non-standard atmospheric effects in FSO systems

Otakar Wilfert, Juraj Poliak, Peter Barcík, José Arce-Diego, Félix Fanjul-Vélez, Irene Salas-García, Noé Ortega Quijano

Proceedings Volume 8874, 88740S (2013) https://doi.org/10.1117/12.2023207

KEYWORDS: Free space optics, Atmospheric optics, Signal attenuation, Transceivers, Atmospheric modeling, Atmospheric sensing, Transmitters, Modeling, Atmospheric propagation, Receivers

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Proceedings Article | 19 September 2013 Paper

Modelling of MG-Y laser tuning characteristics

Juraj Poliak, Hilmar Heininger, Friedemann Mohr, Otakar Wilfert

Proceedings Volume 8868, 88680N (2013) https://doi.org/10.1117/12.2022739

KEYWORDS: Mathematical modeling, Brain-machine interfaces, Reflectors, Modeling, Laser applications, Tunable lasers, Fiber Bragg gratings, Telecommunications, Photodiodes, Laser metrology

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Proceedings Article | 24 October 2012 Paper

Extended Model of the Restricted Beam for FSO links

Juraj Poliak, Otakar Wilfert

Proceedings Volume 8517, 851711 (2012) https://doi.org/10.1117/12.929587

KEYWORDS: Diffraction, Signal attenuation, Free space optics, Gaussian beams, Near field optics, Atmospheric optics, Transmitters, Computer simulations, Fourier transforms, Bessel functions

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Proceedings Article | 11 October 2011 Paper

Multimode fiber-based transmitter for free space optical communications

Félix Fanjul-Vélez, Otakar Wilfert, Martin Hampl, Irene Salas-García, Noé Ortega-Quijano, José Luis Arce-Diego

Proceedings Volume 8306, 83060U (2011) https://doi.org/10.1117/12.912072

KEYWORDS: Free space optics, Optical fibers, Radio optics, Atmospheric optics, Beam shaping, Transmitters, Multimode fibers, Coherence (optics), Free space, Free space optical communications

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Proceedings Article | 15 September 2011 Paper

Power budget model for indoor wireless optical link

Otakar Wilfert, Ales Prokes, Jan Diblik, Petra Hrbackova

Proceedings Volume 8162, 81620W (2011) https://doi.org/10.1117/12.893632

KEYWORDS: Reflectivity, Mathematical modeling, Radio optics, Laser optics, Radar, Atmospheric optics, Reflection, Free space optics, Semiconductor lasers, Signal attenuation

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Proceedings Article | 15 September 2011 Paper

Influence of optical elements on the laser beam profile

Otakar Wilfert, Jiri Komrska, Juraj Poliak, Zdenek Kolka

Proceedings Volume 8162, 81620V (2011) https://doi.org/10.1117/12.893596

KEYWORDS: Diffraction, Bessel functions, Near field optics, Free space optics, Computer simulations, Receivers, Integrated optics, Atmospheric optics, Fourier transforms, Optical components

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Proceedings Article | 15 December 2010 Paper

Measurement of optical beam for free space optical link

O. Wilfert, L. Dordova

Proceedings Volume 7746, 774621 (2010) https://doi.org/10.1117/12.881506

KEYWORDS: Free space optics, Electronics, Optical testing, Atmospheric optics, Laser applications, Radio optics, Free space, Quantum electronics, Distance measurement, Optical communications

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Proceedings Article | 24 August 2010 Paper

Propagation study of 850nm/58 GHz hybrid municipal system

Otakar Wilfert, Vaclav Kvicera, Zdenek Kolka, Martin Grabner, Ondrej Fiser

Proceedings Volume 7814, 781414 (2010) https://doi.org/10.1117/12.860508

KEYWORDS: Signal attenuation, Fiber optic gyroscopes, Free space optics, Visibility through fog, Visibility, Atmospheric optics, Cadmium sulfide, Scattering, Absorption, Aluminum

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Proceedings Article | 12 August 2009 Paper

Attenuation measurement on dual-wavelength optical free-space link

Ondrej Fiser, Jaroslav Svoboda, Zuzana Chladova, Petr Pesice, Jaroslav Fisak, Otakar Wilfert, Zdenek Kolka, Vladimir Brazda, Jan Jaros

Proceedings Volume 7463, 746302 (2009) https://doi.org/10.1117/12.825700

KEYWORDS: Signal attenuation, Free space optics, Turbulence, Visibility, Fiber optic gyroscopes, Visibility through fog, Lamps, Observatories, 3D metrology, Atmospheric optics

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Proceedings Article | 20 November 2008 Paper

Optical communication in free space

Otakar Wilfert, Hennes Henniger, Zdenek Kolka

Proceedings Volume 7141, 714102 (2008) https://doi.org/10.1117/12.822347

KEYWORDS: Satellites, Free space optics, Atmospheric optics, Radio optics, Optical communications, Satellite communications, Telecommunications, Receivers, Transmitters, Space operations

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Proceedings Article | 18 November 2008 Paper

New trends in laser satellite communications: design and limitations

J. Císar, O. Wilfert, F. Fanjul-Vélez, N. Ortega-Quijano, J. Arce-Diego

Proceedings Volume 7138, 71382I (2008) https://doi.org/10.1117/12.818089

KEYWORDS: Atmospheric optics, Free space optics, Satellites, Satellite communications, Receivers, Telecommunications, Optical communications, Signal attenuation, Scintillation, Transmitters

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Proceedings Article | 19 August 2008 Paper

Dual optical wireless test link

Otakar Wilfert, Zdenek Kolka, Viera Biolkova, Petr Krivak, Lucie Dordova, Ondrej Fiser, Jiri Nemecek

Proceedings Volume 7091, 70910W (2008) https://doi.org/10.1117/12.795079

KEYWORDS: Signal attenuation, Visibility, Atmospheric optics, Visibility through fog, Receivers, Fiber optic gyroscopes, Atmospheric particles, Optical testing, Atmospheric monitoring, Transmitters

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Proceedings Article | 8 May 2008 Paper

Optimal laser diode operating mode with unstable operating temperature in turbulent atmosphere

Lucie Dordova, Otakar Wilfert

Proceedings Volume 6997, 69971G (2008) https://doi.org/10.1117/12.779731

KEYWORDS: Atmospheric optics, Semiconductor lasers, Free space optics, Temperature metrology, Signal detection, Laser optics, Optical communications, Wireless communications, Gaussian beams, Thermography

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Proceedings Article | 28 April 2008 Paper

Optical sensors for the free space optical link

Petr Křivák, Otakar Wilfert

Proceedings Volume 7003, 70031M (2008) https://doi.org/10.1117/12.780105

KEYWORDS: Photodiodes, Signal attenuation, Semiconductor lasers, Avalanche photodetectors, Signal to noise ratio, Atmospheric particles, Receivers, Silicon, Free space optics, Atmospheric propagation

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Proceedings Article | 5 October 2007 Paper

Application of nondiffracting beams to wireless optical communications

V. Kollarova, T. Medrik, R. Celechovsky, Z. Bouchal, O. Wilfert, Z. Kolka

Proceedings Volume 6736, 67361C (2007) https://doi.org/10.1117/12.737361

KEYWORDS: Nondiffracting beams, Axicons, Beam propagation method, Spatial light modulators, Atmospheric propagation, Telescopes, Phase shift keying, Gaussian beams, Beam shaping, Wireless communications

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Proceedings Article | 27 September 2007 Paper

Narrow-band high-power semiconductor lasers for optical communication

Zdeněk Buchta, Ondřej Číp, Otakar Wilfert, Josef Lazar

Proceedings Volume 6709, 67091K (2007) https://doi.org/10.1117/12.734148

KEYWORDS: Semiconductor lasers, Laser stabilization, Rubidium, Absorption, Polarization, Diffraction gratings, High power lasers, Optical pumping, Laser development, Laser systems engineering

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Proceedings Article | 25 September 2007 Paper

Complex model of terrestrial FSO links

Zdenek Kolka, Otakar Wilfert, Radek Kvicala, Ondrej Fiser

Proceedings Volume 6709, 67091J (2007) https://doi.org/10.1117/12.732421

KEYWORDS: Signal attenuation, Atmospheric modeling, Free space optics, Statistical modeling, Receivers, Statistical analysis, Fiber optic gyroscopes, Transceivers, Visibility through fog, Visibility

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Proceedings Article | 13 October 2006 Paper

Analysis and comparison of various free-space optical receiver configurations

Ales Prokes, Otakar Wilfert

Proceedings Volume 6399, 63990D (2006) https://doi.org/10.1117/12.689912

KEYWORDS: Receivers, Optical amplifiers, Photodiodes, Avalanche photodetectors, PIN photodiodes, Resistance, Silicon, Field effect transistors, Transistors, Capacitance

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Proceedings Article | 1 September 2006 Paper

Estimation of FSO link availability in Central European localities

Otakar Wilfert, Zdenek Kolka, Jiri Nemecek, Viera Biolkova

Proceedings Volume 6303, 63030R (2006) https://doi.org/10.1117/12.680479

KEYWORDS: Signal attenuation, Free space optics, Atmospheric modeling, Statistical analysis, Atmospheric optics, Transceivers, Statistical modeling, Receivers, Atmospheric particles, Atmospheric sensing

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Proceedings Article | 20 October 2004 Paper

Statistical model of free-space optical data link

Otakar Wilfert, Zdenek Kolka

Proceedings Volume 5550, (2004) https://doi.org/10.1117/12.558697

KEYWORDS: Signal attenuation, Free space optics, Receivers, Statistical analysis, Atmospheric modeling, Atmospheric particles, Atmospheric optics, Photodiodes, Signal to noise ratio, Data modeling

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Proceedings Article | 29 July 2002 Paper

Residual reflectivity of amplification media for extended-cavity laser

B. Ruzicka, Josef Lazar, O. Wilfert, Pavel Pokorny

Proceedings Volume 4900, (2002) https://doi.org/10.1117/12.484579

KEYWORDS: Reflectivity, Semiconductor lasers, Diodes, Antireflective coatings, Deposition processes, Refraction, Lithium, Helium neon lasers, Refractive index, Modulation

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