Dr. Jan Látal Profile

Dr. Jan Látal

researcher at VŠB-Technical Univ of Ostrava

SPIE Involvement:

Author

Area of Expertise:

Optical access network , Free Space Optics , Optic sensors

Profile Summary

He received his B.Sc. Degree from the VSB-Technical University of Ostrava, Faculty of Electrical Engineering and Computer Science, Dept. of Electronic and Telecommunications in 2006. He received his M.Sc. Degree from the VSB-Technical University of Ostrava, Faculty of Electrical Engineering and Computer Science, Dept. of Telecommunications in 2008. He received his Ph.D.. Degree from the VSB-Technical University of Ostrava, Faculty of Electrical Engineering and Computer Science, Dept. of Telecommunications in 2016, he focuses on optical technologies (xPON) and especially on Free Space Optics, optics sensors etc. He is a member of SPIE, OSA and IEEE.

Publications (52)

Proceedings Article | 20 June 2024 Poster + Paper

Poster + Paper

Design and measurement of fiber optic VLC transmitter based on POF

Stanislav Hejduk, Ales Vanderka, Lukas Hajek, Jan Nedoma, Jan Latal, Petr Siska, Daniel Krizan, Jakub Cubik, Carlos Marques

Proceedings Volume 13001, 130010J (2024) https://doi.org/10.1117/12.3017451

KEYWORDS: Transmitters, Visible light communication, Optical spheres, Design, Optical fibers, Polydimethylsiloxane, Light sources and illumination, Telecommunications

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Proceedings Article | 2 July 2019 Open Access

Open Access

Paper

The company at university laboratory like efficient means for training of future engineers

Vladimir Vasinek, Vladimira Rasnerova, Lukas Hajek, Jan Latal

Proceedings Volume 11143, 111431X (2019) https://doi.org/10.1117/12.2523894

KEYWORDS: Fiber optics sensors, Photonics, Fiber optics, Sensors, Optical fibers, Optical communications, Education and training, Safety, Fiber optics tests, Magnetism

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Proceedings Article | 1 December 2017 Paper

Paper

The behavior of the geometrical parameters of optical beam of optical passive components under the long time thermal load

Frantisek Perecar, Jan Latal, Lukas Bednarek, Lukas Hajek, David Hruby, Vladimir Vasinek, Jan Nedoma, Jakub Jaros

Proceedings Volume 10603, 106030S (2017) https://doi.org/10.1117/12.2292422

KEYWORDS: Geometrical optics, Fiber couplers

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Proceedings Article | 23 December 2016 Paper

Paper

Measurement of the optical fiber numeric aperture exposed to thermal and radiation aging

Ales Vanderka, Lukas Bednarek, Lukas Hajek, Jan Latal, Radek Poboril, Petr Zavodny, Vladimir Vasinek

Proceedings Volume 10142, 1014224 (2016) https://doi.org/10.1117/12.2257339

KEYWORDS: Optical fibers, Gamma radiation, Sensors, Cladding, LabVIEW, Optical testing, Multimode fibers, Signal attenuation, Refractive index, Telecommunications

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Proceedings Article | 23 December 2016 Paper

Paper

Simulation of turbulences and fog effects on the free space optical link inside of experimental box

Jan Latal, Jan Vitasek, Lukas Hajek, Ales Vanderka, Petr Koudelka, Stanislav Kepak, Vladimir Vasinek

Proceedings Volume 10142, 101421O (2016) https://doi.org/10.1117/12.2257443

KEYWORDS: Fiber optic gyroscopes, Free space optics, Signal attenuation, Turbulence, Atmospheric optics, Fluctuations and noise, Thermal effects, Sensors, Distance measurement, Velocity measurements

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Proceedings Article | 19 September 2016 Paper

Paper

Testing FSO WDM communication system in simulation software optiwave OptiSystem in different atmospheric environments

Ales Vanderka, Lukas Hajek, Lukas Bednarek, Jan Latal, Jan Vitasek, Stanislav Hejduk, Vladimir Vasinek

Proceedings Volume 9979, 997914 (2016) https://doi.org/10.1117/12.2237903

KEYWORDS: Free space optics, Wavelength division multiplexing, Modulation, Signal to noise ratio, Telecommunications, Quadrature amplitude modulation, Signal attenuation, Phase shift keying, Head, Eye

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Proceedings Article | 19 September 2016 Paper

Paper

Optical intensity scintillation in the simulated atmospherical environment

Lukas Hajek, Jan Latal, Ales Vanderka, Jan Vitasek, Marian Bojko, Lukas Bednarek, Vladimir Vasinek

Proceedings Volume 9979, 997915 (2016) https://doi.org/10.1117/12.2237969

KEYWORDS: Atmospheric optics, Refractive index, Sensors, Receivers, Scintillation, Free space optics, Turbulence, Mathematical modeling, Data modeling, Atmospheric scintillation

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Proceedings Article | 4 September 2015 Paper

Paper

Testing resistance modulation formats for FSO communication in turbulent environment, with used simulation box

Ales Vanderka, Lukas Hajek, Jan Latal, Jan Vitasek, Stanislav Hejduk, Vladimir Vasinek

Proceedings Volume 9614, 96140S (2015) https://doi.org/10.1117/12.2180335

KEYWORDS: Eye, Modulation, Fiber optic gyroscopes, Free space optics, Signal attenuation, Fluctuations and noise, Phase shift keying, Receivers, Semiconductor lasers, Atmospheric modeling

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Proceedings Article | 4 September 2015 Paper

Paper

Statistical prediction of the atmospheric behavior for free space optical link

Lukas Hajek, Jan Vitasek, Ales Vanderka, Jan Latal, Frantisek Perecar, Vladimir Vasinek

Proceedings Volume 9614, 96140V (2015) https://doi.org/10.1117/12.2180338

KEYWORDS: Free space optics, Solar radiation models, Statistical analysis, Atmospheric optics, Refractive index, Data modeling, Atmospheric modeling, Signal attenuation, Head, Mathematical modeling

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Proceedings Article | 29 July 2015 Paper

Paper

Novel optical fiber design for DTS measurement purposes

Petr Siska, Lukas Hajek, Vladimir Vasinek, Petr Koudelka, Jan Latal

Proceedings Volume 9659, 96591O (2015) https://doi.org/10.1117/12.2196296

KEYWORDS: Multimode fibers, Optical fibers, Refractive index, Optical design, Temperature metrology, Fiber optic communications, Optical communications, Raman scattering, Raman spectroscopy, Sensors

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Proceedings Article | 29 July 2015 Paper

Paper

Study of LED modulation effect on the photometric quantities and beam homogeneity of automotive lighting

Petr Koudelka, Patrik Hanulak, Jakub Jaros, Martin Papes, Jan Latal, Petr Siska, Vladimir Vasinek

Proceedings Volume 9659, 96591P (2015) https://doi.org/10.1117/12.2196299

KEYWORDS: Modulation, Light emitting diodes, Telecommunications, Optical communications, Control systems, Taillights, Headlamps, Electrochemical etching, Sensors, LED lighting

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Proceedings Article | 29 July 2015 Paper

Paper

Measurement of turbulences influence on the laser beam polarization state

Jan Latal, Jan Vitasek, Lukas Hajek, Petr Koudelka, Petr Siska, Stanislav Hejduk, Ales Vanderka, Vladimir Vasinek

Proceedings Volume 9659, 96591L (2015) https://doi.org/10.1117/12.2196261

KEYWORDS: Polarization, Turbulence, Free space optics, Polarimetry, Optical spheres, Optical simulations, Networks, Atmospheric optics, Thermography, Jones vectors

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Proceedings Article | 7 May 2015 Paper

Paper

Investigation of optical thin films printed on the surface of facets of photonic crystal fibers

M. Lucki, S. Kraus, R. Zeleny, Johann Zehetner, Dana Seyringer, J. Latal, F. Perecar

Proceedings Volume 9507, 95070A (2015) https://doi.org/10.1117/12.2182203

KEYWORDS: Thin films, Photonic crystal fibers, Laser ablation, Gold, Optical filters, Free space optics, Waveguides, Metals, Filtering (signal processing), Polarization

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Optical fibres are widely used in various applications as a medium for optical signals or optical transfer. This transport can be realized on long distance, compared to free space optics, which significantly extends reach of applications. Free space optics and fibre optics are combined in practice to yield the maximum performance of individual components forming a particular system. In such cases, light coupling from free space into fibres is required and it is frequently implemented with the use of lenses. An optical signal coupled into a fibre may also need certain modifications of spectral and spatial properties to allow its propagation down the fibre or reduce the amount of power carried in. The above requirement has been fulfilled by modifying surface of facets of photonic crystal fibres. By extrusion of a certain amount of host material from the surface, it is possible to obtain a structure resembling a thin film or an opaque layer for certain wavelengths. Several different structures of photonic crystal fibres and materials are considered to show influence of such thin-film on signal properties. This investigation is carried out in context of abilities of ablation of material from surfaces of photonic crystal fibres. Only certain shapes and geometrical arrangements can be considered. One of the goals is to specify, which of them are key for potential modification of spectral characteristics of photonic crystal fibres. The printed structures could potentially work like a thin-film ablation. Rigorous and versatile finite difference method has been employed to model propagation of light, its incidence onto a surface of the photonic crystal fibre, and subsequent propagation down the fibre. The simulations are carried on small pieces of photonic crystal fibres, with the length of tens of micrometres, due to well-known demands of the simulation technique on computational resources. Nevertheless, such a simplification is valid, since the structure is longitudinally uniform beyond the thin-film layer. However, this is aspect is not covered in the presented paper and it is our ongoing effort. Finally, the goal is to verify if the investigated structures can work as a slot waveguide.

Proceedings Article | 7 February 2015 Paper

Paper

RFoG deployment into the next-generation networks

Petr Siska, Tomas Hlavinka, Petr Koudelka, Jan Latal, Jan Vitasek, Lukas Hajek, Radek Poboril

Proceedings Volume 9388, 93880R (2015) https://doi.org/10.1117/12.2087121

KEYWORDS: Network architectures, Networks, Image quality, Passive optical networks, Electronic filtering, Optical amplifiers, Signal attenuation, Optical networks, Receivers, Video

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Proceedings Article | 7 February 2015 Paper

Paper

Software design of segment optical transmitter for indoor free-space optical networks

Jan Latal, Jan Vitasek, Petr Koudelka, Petr Siska, Andrej Liner, Lukas Hajek, Ales Vanderka, Vladimir Vasinek, Michal Lucki

Proceedings Volume 9387, 93870Y (2015) https://doi.org/10.1117/12.2087118

KEYWORDS: Transmitters, Free space optics, Optical networks, Adaptive optics, Free space, Optical design, Eye, Telecommunications, Safety, Standards development

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Proceedings Article | 7 February 2015 Paper

Paper

Software design of optical link for indoor wireless optical communication network used LEDs as source visible light communication

Andrej Liner, Martin Papes, Jakub Jaros, Petr Koudelka, Jan Latal, Jan Vitasek, Lukas Hajek, Vladimir Vasinek

Proceedings Volume 9387, 938710 (2015) https://doi.org/10.1117/12.2087120

KEYWORDS: Light emitting diodes, Channel projecting optics, Optical communications, Optical networks, Visible radiation, Transmitters, Optical design, Light sources and illumination, Receivers, Wireless communications

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Proceedings Article | 7 February 2015 Paper

Paper

Ageing of fiber optical devices

Vladimír Vasinek, Petr Siska, Lukas Bednarek, Jan Latal, Petr Koudelka, Ondrej Marcinka

Proceedings Volume 9389, 93890T (2015) https://doi.org/10.1117/12.2087165

KEYWORDS: Signal attenuation, Fiber optics, Gamma radiation, Fiber optics sensors, Optical fibers, Telecommunications, Fiber optic communications, Fiber couplers, Environmental sensing, Sensors

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Proceedings Article | 6 January 2015 Paper

Paper

Measurement of insulation layers using DTS system

David Hruby, Tomas Kajnar, Petr Koudelka, Jan Latal, Jan Hurta, Stanislav Kepak, Jakub Jaros, Vladimir Vasinek

Proceedings Volume 9450, 94500M (2015) https://doi.org/10.1117/12.2073555

KEYWORDS: Temperature metrology, Sensors, Optical fibers, Fiber optics, Raman scattering, Sensing systems, Fiber optics sensors, Fiber optics tests, Distance measurement, Reflectometry

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Proceedings Article | 6 January 2015 Paper

Paper

Study of the effect of temperature on the optical connectors

Tomas Kajnar, Jan Latal, Marcel Fajkus, David Hruby, Stanislav Kepak, Vladimir Vasinek

Proceedings Volume 9450, 94500T (2015) https://doi.org/10.1117/12.2070326

KEYWORDS: Connectors, Temperature metrology, Signal attenuation, Polishing, Single mode fibers, Statistical analysis, Optical fibers, Interfaces, Thermography, Data modeling

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Proceedings Article | 6 January 2015 Paper

Paper

Security risk assessment of the primary layer of wavelength division multiplexing passive optical network

Petr Koudelka, Petr Siska, Jan Latal, Radek Poboril, Lukas Hajek, Stanislav Kepak, Vladimir Vasinek

Proceedings Volume 9450, 94500U (2015) https://doi.org/10.1117/12.2070468

KEYWORDS: WDM-PON, Network security, Phased array optics, Passive optical networks, Networks, Wavelength division multiplexing, Optical networks, Time division multiplexing, Computer security, Channel projecting optics

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Proceedings Article | 6 January 2015 Paper

Paper

New approach to design of optical transmitter for indoor free space optical network

Jan Latal, Petr Koudelka, Jan Vitasek, Lukas Hajek, Stanislav Hejduk, Andrej Liner, Petr Siska, Vladimir Vasinek

Proceedings Volume 9450, 94501D (2015) https://doi.org/10.1117/12.2073495

KEYWORDS: Free space optics, Transmitters, Adaptive optics, Optical design, Telecommunications, Free space, Optical networks, Light emitting diodes, Free space optical communications, Geometrical optics

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Proceedings Article | 7 October 2014 Paper

Paper

Indoor visible light communication: modeling and analysis of multi-state modulation

Petr Koudelka, Jan Latal, Petr Siska, Jan Vitasek, Andrej Liner, Radek Martinek, Vladimir Vasinek

Proceedings Volume 9224, 92241I (2014) https://doi.org/10.1117/12.2063090

KEYWORDS: Modulation, Light emitting diodes, Visible radiation, Receivers, Networks, Photodetectors, Optical networks, Ocean optics, Optical amplifiers, Telecommunications

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Proceedings Article | 12 September 2014 Paper

Paper

Simulation of integrated optical network (IPON) properties

Petr Siska, Petr Koudelka, Jan Latal, Jan Vitasek, Stanislav Kepak, Vladimír Vašinek

Proceedings Volume 9193, 91931J (2014) https://doi.org/10.1117/12.2063015

KEYWORDS: WDM-PON, Optical networks, Networks, Optical simulations, Dense wavelength division multiplexing, Receivers, Transmitters, Eye, Integrated optics, Wavelength division multiplexing

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Proceedings Article | 12 September 2014 Paper

Paper

WDM-PON network simulation with different implementation of optical amplifier in the line

Jan Latal, Petr Koudelka, Petr Siska, Jan Vitasek, Vladimir Vasinek

Proceedings Volume 9193, 919318 (2014) https://doi.org/10.1117/12.2060112

KEYWORDS: Optical amplifiers, WDM-PON, Raman spectroscopy, Signal to noise ratio, Attenuators, Fiber amplifiers, Networks, L band, Signal attenuation, Optical networks

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Proceedings Article | 21 May 2014 Paper

Paper

Features and range of the FSO by use of the OFDM and QAM modulation in different atmospheric conditions

Liner Andrej, Frantisek Perecar, Jakub Jaros, Martin Papes, Petr Koudelka, Jan Latal, Jakub Cubik, Vladimir Vasinek

Proceedings Volume 9103, 91030O (2014) https://doi.org/10.1117/12.2050279

KEYWORDS: Modulation, Orthogonal frequency division multiplexing, Free space optics, Quadrature amplitude modulation, Fiber optic gyroscopes, Signal attenuation, Phase shift keying, Amplitude shift keying, Receivers, Radio optics

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Proceedings Article | 25 September 2013 Paper

Paper

Recovery of LED diode optical spectrum

Jan Vitasek, Jan Latal, Petr Siska, Jan Skapa, Martin Papes, Vladimir Vasinek

Proceedings Volume 8874, 88740M (2013) https://doi.org/10.1117/12.2023862

KEYWORDS: Light emitting diodes, Diodes, Modulation, Free space optics, Visible radiation, Networks, Radium, Optical components, Ocean optics, Standards development

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Proceedings Article | 3 May 2013 Paper

Paper

Coupling conditions for quasi-single mode optical fibers with different refractive index profile

Petr Siska, Jan Latal, Petr Koudelka, Jan Vitasek, Ivan Kasik, Vladimir Vasinek

Proceedings Volume 8774, 87741T (2013) https://doi.org/10.1117/12.2017259

KEYWORDS: Optical fibers, Refractive index, Optical testing, Beam analyzers, Sensors, Microscopes, CCD cameras, Semiconductor lasers, Signal attenuation, Fiber optics sensors

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Proceedings Article | 3 May 2013 Paper

Paper

Usage of Raman DTS for wooden material analysis

Vladimir Vasinek, Jan Latal, Petr Koudelka, Martin Papes, Andrej Liner, Vladimira Rasnerova

Proceedings Volume 8774, 877418 (2013) https://doi.org/10.1117/12.2017964

KEYWORDS: Temperature metrology, Optical fibers, Raman spectroscopy, Multimode fibers, Raman scattering, Medium wave, Light scattering, Transmittance, Buildings, Scattering

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Proceedings Article | 3 May 2013 Paper

Paper

Low noise omnidirectional optical receiver for the mobile FSO networks

Karel Witas, Stanislav Hejduk, Vladimir Vasinek, Jan Vitasek, Jan Latal

Proceedings Volume 8774, 87741Q (2013) https://doi.org/10.1117/12.2017086

KEYWORDS: Receivers, Photodiodes, Free space optics, Transmitters, Signal to noise ratio, Geometrical optics, Diodes, Sensors, Optical amplifiers, Amplifiers

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Proceedings Article | 3 May 2013 Paper

Paper

Rock massif temperature changes measurement with regard to thermal responses generated by a thermal response test device

Jan Latal, Jan Vitasek, Petr Koudelka, Petr Siska, Andrej Liner, Martin Papes, Karel Witas, Stanislav Hejduk, Vladimir Vasinek

Proceedings Volume 8774, 877416 (2013) https://doi.org/10.1117/12.2017241

KEYWORDS: Temperature metrology, Raman scattering, Optical fibers, Raman spectroscopy, Sensors, Scattering, 3D metrology, Wind energy, Thermal effects, Light scattering

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Proceedings Article | 18 December 2012 Paper

Paper

Simulation and measurement of optical access network with different types of optical-fiber amplifiers

Jan Latal, Jan Vogl, Petr Koudelka, Jan Vitasek, Petr Siska, Andrej Liner, Martin Papes, Vladimir Vasinek

Proceedings Volume 8697, 86971U (2012) https://doi.org/10.1117/12.2001263

KEYWORDS: Optical amplifiers, Networks, Fiber amplifiers, WDM-PON, Optical networks, Terahertz radiation, Raman spectroscopy, Signal attenuation, Passive optical networks, Optical components

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Proceedings Article | 18 December 2012 Paper

Paper

The fog influence on bit error ratio

Jan Vitasek, Jan Látal, Vladimir Vašinek, Stanislav Hejduk, Andrej Liner, Martin Papes, Petr Koudelka, Artem Ganiyev

Proceedings Volume 8697, 86970L (2012) https://doi.org/10.1117/12.2001748

KEYWORDS: Fiber optic gyroscopes, Signal attenuation, Free space optics, Atmospheric modeling, Light emitting diodes, Visibility through fog, Visibility, Diodes, Photodetectors, Meteorology

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Proceedings Article | 18 December 2012 Paper

Paper

Fiber Bragg Grating vibration sensor with DFB laser diode

Petr Siska, Martin Brozovic, Jakub Cubik, Stanislav Kepak, Jan Vitasek, Petr Koudelka, Jan Latal, Vladimir Vasinek

Proceedings Volume 8697, 86971P (2012) https://doi.org/10.1117/12.2010467

KEYWORDS: Fiber Bragg gratings, Sensors, Semiconductor lasers, Optical fibers, Diodes, Modulation, Refractive index, Linear filtering, Diffraction gratings, Environmental sensing

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Proceedings Article | 18 December 2012 Paper

Paper

The optical power distribution in a dark room

Andrej Liner, Martin Papes, Jan Vitasek, Petr Koudelka, Jan Látal, Jakub Cubik, Vladimir Vašinek

Proceedings Volume 8697, 86970K (2012) https://doi.org/10.1117/12.2003929

KEYWORDS: Light emitting diodes, Optical testing, Light sources, Radio optics, Reflection, Photodetectors, Signal to noise ratio, Visible radiation, Telecommunications, Light sources and illumination

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Proceedings Article | 18 December 2012 Paper

Paper

Measurement of attenuation changes of PON elements with temperature

Martin Papes, Petr Šiška, Andrej Liner, Jan Látal, Petr Koudelka, Jan Vitasek, Marcel Fajkus, Vladimir Vašinek

Proceedings Volume 8697, 86971R (2012) https://doi.org/10.1117/12.2006394

KEYWORDS: Signal attenuation, Temperature metrology, Waveguides, Phase shifts, Networks, Optical networks, Connectors, Sensors, Packaging, Optical components

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Proceedings Article | 18 December 2012 Paper

Paper

New method of analysis of crystallizer temperature profile using optical fiber DTS

Petr Koudelka, Martin Pápeš, Andrej Líner, Jan Látal, Petr Šiška, Vladimír Vašinek

Proceedings Volume 8697, 86971Q (2012) https://doi.org/10.1117/12.2007268

KEYWORDS: Crystals, Optical fibers, Sensors, Temperature metrology, Raman scattering, Raman spectroscopy, Scattering, Molecules, Signal attenuation, Distributed computing

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Proceedings Article | 19 October 2012 Paper

Paper

Simulation of fog influence on laser beam distribution in atmosphere

Vladimir Vasinek, Jan Latal, Petr Koudelka, Jan Vitasek, Karel Witas, Stanislav Hejduk

Proceedings Volume 8540, 85400Y (2012) https://doi.org/10.1117/12.977617

KEYWORDS: Fiber optic gyroscopes, Signal attenuation, Free space optics, Atmospheric optics, Atmospheric propagation, Atmospheric modeling, Gaussian beams, Optical simulations, Telecommunications, Transmittance

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Optical fibreless data networks P2P offer fast data transmissions with big transmittance from 1- 10 Gbps on a distance of 1- 6 km. Perfections of such networks are especially flexibility, rapid creation of communications. Sensitivity to atmospheric influences, necessity of light on sight belongs to disadvantages. Transmission through atmosphere be characterized by non-stationarity, inhomogeneity, the influences have random character. It means immediately that it is possible only with difficulty to project conclusions concerning to the measurement on one line upon fiberless line in another position. Contribution tackles a question of forming of the artificial hazy atmospheres, finding the statistical parameters of artificially created foggy atmospheres that could be reproduced to real environment. This work describes created laboratory apparatus powered with fog generator, heat source and ventilating fans, which allow in a controlled way to change the optical transmission inside the bounded space. Laser diode radiation at wavelength of 850 nm is transmitted into created space like this which is scanned with optical power meter after passing of artificially created turbulent vaporous environment. Changes in intensity of the passed lights are captured; the mean value and maximum deviation from the mean value are computed. In this way it is possible to change the reached specific attenuation in dB/km. Owing to turbulences it happens to deviations from the mean value, these abnormalities are characterized by the distribution function that describes the size of turbulences in time. By the help of ergodic theorem then it is possible to deduce that the distribution function of the foggy turbulences gained at continuous time evaluation has same history like the distribution function gained behind the same conditions in the setup in other times. It holds as well that these distribution functions are the same for variety of points in experimental space, provided there are well - kept the same conditions of turbulence creations. Contribution shows the experimental values, shapes of distribution functions, their influence on attenuation of fiberless communication lines and on achieved the transmission BER. At the present time the verification of conclusions is performed from the experimental model on outdoor connecting link working upon the distance of 1,3 km at the transmission rate of 1,25 Gbps.

Proceedings Article | 11 May 2012 Paper

Paper

Simulation of the influence of atmospheric conditions on low-cost optical free space link

Jan Latal, Petr Koudelka, Jan Vitasek, Petr Siska, Jan Skapa, Andrej Liner, Martin Papes, Vladimir Vasinek

Proceedings Volume 8433, 84331T (2012) https://doi.org/10.1117/12.921700

KEYWORDS: Free space optics, Atmospheric optics, Free space, Eye, Photodetectors, Optical amplifiers, Signal attenuation, Semiconductor lasers, Fiber optic gyroscopes, Photodiodes

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Proceedings Article | 11 May 2012 Paper

Paper

Interaction between laser beams FP and DFB laser diodes

Vladimir Vasinek, Jan Latal, Petr Koudelka, Petr Siska, Jan Vitasek, Karel Witas

Proceedings Volume 8432, 84321U (2012) https://doi.org/10.1117/12.922136

KEYWORDS: Semiconductor lasers, Light emitting diodes, Phase modulation, Fiber lasers, Tunable lasers, Optical fibers, Optical isolators, Laser damage threshold, Structured optical fibers, Light sources

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Proceedings Article | 7 May 2012 Paper

Paper

Mach-Zehnder interferometer for movement monitoring

Vladimir Vasinek, Jakub Cubik, Stanislav Kepak, Jan Doricak, Jan Latal, Petr Koudelka

Proceedings Volume 8370, 83700R (2012) https://doi.org/10.1117/12.919349

KEYWORDS: Interferometers, Signal processing, Mach-Zehnder interferometers, Interferometry, Optical fibers, Fourier transforms, Motion analysis, Single mode fibers, Fiber couplers, Electronic filtering

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Fiber optical interferometers belong to highly sensitive equipments that are able to measure slight changes like distortion of shape, temperature and electric field variation and etc. Their great advantage is that they are insensitive on ageing component, from which they are composed of. It is in virtue of herewith, that there are evaluated no changes in optical signal intensity but number interference fringes. To monitor the movement of persons, eventually to analyze the changes in state of motion we developed method based on analysis the dynamic changes in interferometric pattern. We have used Mach- Zehnder interferometer with conventional SM fibers excited with the DFB laser at wavelength of 1550 nm. It was terminated with optical receiver containing InGaAs PIN photodiode. Its output was brought into measuring card module that performs on FFT of the received interferometer signal. The signal rises with the composition of two waves passing through single interferometer arm. The optical fiber SMF 28e in one arm is referential; the second one is positioned on measuring slab at dimensions of 1x2m. A movement of persons around the slab was monitored, signal processed with FFT and frequency spectra were evaluated. They rose owing to dynamic changes of interferometric pattern. The results reflect that the individual subjects passing through slab embody characteristic frequency spectra, which are individual for particular persons. The scope of measuring frequencies proceeded from zero to 10 kHz. It was also displayed in experiments that the experimental subjects, who walked around the slab and at the same time they have had changed their state of motion (knee joint fixation), embodied characteristic changes in their frequency spectra. At experiments the stability of interferometric patterns was evaluated as from time aspects, so from the view of repeated identical experiments. Two kinds of balls (tennis and ping-pong) were used to plot the repeatability measurements and the gained spectra at repeated drops of balls were compared. Those stroked upon the same place and from the same elevation and dispersion of the obtained frequency spectra was evaluated. These experiments were performed on the series of 20 repeated drops from highs of 0,5 and 1m. The evaluation of experiments displayed that the dispersion of measured values is lower than 4%. Frequency response has been verified with the loudspeaker connected to signal generator and amplifier. Various slabs have been measured and frequency ranges were compared for particular slab designs.

Proceedings Article | 2 May 2012 Paper

Paper

The design of equipment for optical power measurement in FSO link beam cross-section

Jan Latal, Tomas David, Otakar Wilfert, Zdenek Kolka, Petr Koudelka, Frantisek Hanacek, Jan Vitasek, Petr Siska, Jan Skapa, Vladimir Vasinek

Proceedings Volume 8436, 843610 (2012) https://doi.org/10.1117/12.921701

KEYWORDS: Free space optics, Atmospheric optics, Optical testing, Measurement devices, Control systems, Free space, Radio optics, Head, Connectors, Sensors

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Proceedings Article | 2 May 2012 Paper

Paper

Spectral characteristics of fiber couplers for FTTx networks

Jan Vitasek, Jan Latal, Petr Koudelka, Vladimir Vasinek, Jiri Bocheza, Stanislav Hejduk

Proceedings Volume 8436, 843614 (2012) https://doi.org/10.1117/12.922003

KEYWORDS: Fiber couplers, Manufacturing, Light sources, Fiber to the x, Telecommunications, Spectroscopy, Wavelength division multiplexing, Optical networks, Optical fibers, Chromium

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Proceedings Article | 6 October 2011 Paper

Paper

Interference fiber ring perimeter with FFT analysis

Vladimir Vasinek, Jan Vitasek, Stanislav Hejduk, Jiri Bocheza, Jan Latal, Petr Koudelka

Proceedings Volume 8186, 81860P (2011) https://doi.org/10.1117/12.898076

KEYWORDS: Interferometers, Signal processing, Phase modulation, Mach-Zehnder interferometers, Interferometry, Optical fibers, Fourier transforms, Motion analysis, Single mode fibers, Photodetectors

Read Abstract +

Fiber optical interferometers belong to highly sensitive equipments that are able to measure slight changes like distortion of shape, temperature and electric field variation and etc. Their great advantage is that they are insensitive on ageing component, from which they are composed of. It is in virtue of herewith, that there are evaluated no changes in optical signal intensity but number interference fringes. To monitor the movement of persons, eventually to analyze the changes in state of motion we developed method based on analysis the dynamic changes in interferometric pattern. We have used Mach- Zehnder interferometer with conventional SM and PM fibers excited with the DFB laser at wavelength of 1550 nm. It was terminated with optical receiver containing InGaAs PIN photodiode. Its output was brought into measuring card module that performs on FFT of the received interferometer signal. The signal rises with the composition of two waves passing through single interferometer arm. The optical fiber SMF 28e or PM PANDA fiber in one arm is referential; the second one is positioned on measuring slab at dimensions of 1×2m. A movement of persons over the slab was monitored, signal processed with FFT and frequency spectra were evaluated. They rose owing to dynamic changes of interferometric pattern. The results reflect that the individual subjects passing through slab embody characteristic frequency spectra, which are individual for particular persons. The scope of measuring frequencies proceeded from zero to 10 kHz. At experiments the stability of interferometric patterns was evaluated as from time aspects, so from the view of repeated identical experiments. Two kinds of balls (tennis and ping-pong) were used to plot the repeatability measurements and the gained spectra at repeated drops of balls were compared. Those stroked upon the same place and from the same elevation and dispersion of the obtained frequency spectra was evaluated. These experiments were performed on the series of 20 repeated drops from highs of 0,5 and 1m. The evaluation of experiments displayed that the dispersion of measured values is lower than 4% and could be reduced by PM fibers usage.

Proceedings Article | 23 September 2011 Paper

Paper

Polyaniline nanofilms as a base for novel optical sensor structures

Vladimir Vasinek, Jiri Bocheza, Stanislav Hejduk, Jan Latal, Petr Koudelka, Jan Vitasek

Proceedings Volume 8102, 81020H (2011) https://doi.org/10.1117/12.893085

KEYWORDS: Transmittance, Glasses, Ocean optics, Optical fibers, Sensors, Connectors, Temperature metrology, Fiber optics sensors, Telecommunications, Optical sensors

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Proceedings Article | 9 May 2011 Paper

Paper

Fiber optic DTS system application in the research of accumulation possibilities of thermal energy in the rock mass

Jan Látal, Petr Koudelka, Petr Šiška, Jan Skapa, František Hanáečk, Vladimír Vašinek, Jan Vitásek, Stanislav Hejduk, Jiří Bocheza

Proceedings Volume 8073, 80731T (2011) https://doi.org/10.1117/12.887082

KEYWORDS: Temperature metrology, Fiber optics, Sensors, Raman scattering, Optical fibers, Temperature sensors, Optical sensors, Vestigial sideband modulation, Molecules, Electrical engineering

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Proceedings Article | 9 May 2011 Paper

Paper

Measurement of the spectral characteristics of telecommunication fiber emitted at high temperatures

F. Hanacek, J. Latal, P. Koudelka, P. Siska, J. Skapa, J. Vitásek, V. Vasinek, J. Hurta

Proceedings Volume 8073, 80731V (2011) https://doi.org/10.1117/12.887093

KEYWORDS: Optical fibers, Temperature metrology, Telecommunications, Multimode fibers, Fiber characterization, Sensors, Black bodies, Fiber optics sensors, Waveguides, Spectrometers

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Proceedings Article | 23 February 2011 Paper

Paper

Passive fiber ring as a device for effective refractive index measurement

Vladimir Vasinek, Jan Látal, Petr Koudelka, Petr Šiška, František Hanáček, Jan Skapa

Proceedings Volume 7934, 79341J (2011) https://doi.org/10.1117/12.875316

KEYWORDS: Refractive index, Fiber lasers, Signal attenuation, Fiber amplifiers, Fiber optics, Oscillators, Single mode fibers, Superposition, Feedback loops, Optical fibers

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Proceedings Article | 28 October 2010 Paper

Paper

Mach-Zehnder fiber interferometer for people monitoring

Vladimir Vasinek, Jan Latal, Petr Koudelka, Petr Siska, Jan Vitasek, Jan Skapa

Proceedings Volume 7833, 78330Y (2010) https://doi.org/10.1117/12.864870

KEYWORDS: Interferometers, Signal processing, Mach-Zehnder interferometers, Interferometry, Optical fibers, Fourier transforms, Motion analysis, Single mode fibers, Sensors, Fiber couplers

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Fiber optical interferometers belong to highly sensitive equipments that are able to measure slight changes like distortion of shape, temperature and electric field variation and etc. Their great advantage is that they are insensitive on ageing component, from which they are composed of. It is in virtue of herewith, that there are evaluated no changes in optical signal intensity but number interference fringes. To monitor the movement of persons, eventually to analyze the changes in state of motion we developed method based on analysis the dynamic changes in interferometric pattern. We have used Mach- Zehnder interferometer with conventional SM fibers excited with the DFB laser at wavelength of 1550 nm. It was terminated with optical receiver containing InGaAs PIN photodiode. Its output was brought into measuring card module that performs on FFT of the received interferometer signal. The signal rises with the composition of two waves passing through single interferometer arm. The optical fiber SMF 28e in one arm is referential; the second one is positioned on measuring slab at dimensions of 1x2m. A movement of persons over the slab was monitored, signal processed with FFT and frequency spectra were evaluated. They rose owing to dynamic changes of interferometric pattern. The results reflect that the individual subjects passing through slab embody characteristic frequency spectra, which are individual for particular persons. The scope of measuring frequencies proceeded from zero to 10 KHz. It was also displayed in experiments that the experimental subjects, who walked around the slab and at the same time they have had changed their state of motion (knee joint fixation), embodied characteristic changes in their frequency spectra. At experiments the stability of interferometric patterns was evaluated as from time aspects, so from the view of repeated identical experiments. Two kinds of balls (tennis and ping-pong) were used to plot the repeatability measurements and the gained spectra at repeated drops of balls were compared. Those stroked upon the same place and from the same elevation and dispersion of the obtained frequency spectra was evaluated. These experiments were performed on the series of 20 repeated drops from highs of 0,5 and 1m. The evaluation of experiments displayed that the dispersion of measured values is lower than 4%.

Proceedings Article | 18 August 2010 Paper

Paper

Changes in optical spectrum of photonic fiber with two counter propagating laser beams

Vladimir Vasinek, Jan Latal, Petr Koudelka, Petr Siska, Frantisek Hanacek, Jan Skapa

Proceedings Volume 7781, 77810Y (2010) https://doi.org/10.1117/12.860219

KEYWORDS: Photonic crystal fibers, Semiconductor lasers, Fiber lasers, Signal attenuation, Fiber couplers, Mirrors, Laser beam propagation, Structured optical fibers, Resonators, Optical fibers

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Proceedings Article | 14 May 2010 Paper

Paper

Optical fiber distributed temperature sensor in cardiological surgeries

Jan Skapa, Jan Látal, Marek Penhaker, Petr Koudelka, František Hancek, Vladimír Vasinek

Proceedings Volume 7726, 77261V (2010) https://doi.org/10.1117/12.854309

KEYWORDS: Optical fibers, Temperature metrology, Raman scattering, Surgery, Molecules, Scattering, Temperature sensors, Rayleigh scattering, Sensors, Raman spectroscopy

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Proceedings Article | 26 February 2010 Paper

Paper

Passive fiber rings as a basic part of fiber optic sensors

Jan Látal, Petr Koudelka, Petr Šiška, František Hanáček, Jan Skapa, Vladimír Vašinek

Proceedings Volume 7597, 75971W (2010) https://doi.org/10.1117/12.837815

KEYWORDS: Fiber optics sensors, Fiber amplifiers, Refractive index, Fiber lasers, Signal attenuation, Feedback loops, Fiber optics, Superposition, Erbium, Amplifiers

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Proceedings Article | 5 June 2009 Open Access

Open Access

Paper

From university to company: education of optical communications in cooperation with industry at Technical University of Ostrava

Vladimir Vasinek, Jan Skapa, Petr Siska, Frantisek Hanacek, Jan Latal, Petr Koudelka, Iva Petrikova

Proceedings Volume 9666, 96660Y (2009) https://doi.org/10.1117/12.2208030

KEYWORDS: Structured optical fibers, Atmospheric optics, Active optics, Biomedical optics, Geometrical optics, Thermography, Optical fibers, Dispersion, Telecommunications, Optical communications

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Showing 5 of 52 publications

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