Dr. Lenka Pravdová Profile

Dr. Lenka Pravdová

at Institute of Scientific Instruments of the CAS vvi

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 20 October 2023 Presentation + Paper

Presentation + Paper

Towards shared fiber dissemination infrastructure for precise time, coherent optical frequency, and entanglement transfers with sensing option

Josef Vojtech, Tomas Novak, Elisabeth Andriantsarazo, Vladimir Smotlacha, Ondrej Havlis, Rudolf Vohnout, Michal Spacek, Martin Slapak, Tomas Horvath, Lada Altmannova, Radek Velc, Petr Pospisil, Jan Kundrat, Martin Cizek, Jan Hrabina, Simon Rerucha, Lenka Pravdova, Josef Lazar, Ondrej Cip, Alexander Kuna, Jaroslav Roztocil

Proceedings Volume 12686, 1268604 (2023) https://doi.org/10.1117/12.2677256

KEYWORDS: Optical transmission, Optical coherence, Time metrology, Quantum entanglement, Quantum networks, Quantum key distribution, Quantum frequencies, Quantum coherence, Wavelength division multiplexing networks

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Proceedings Article | 13 December 2022 Paper

Paper

Free space optical link phase noise measurement

Jan Hrabina, Martin Čížek, Lenka Pravdová, Ondřej Číp, Peter Barcík, Zdeněk Kolka, Petr Skryja

Proceedings Volume 12502, 125020S (2022) https://doi.org/10.1117/12.2664641

KEYWORDS: Free space optics, Phase measurement, Optical fibers, Interference (communication), Free space, Receivers, Photodetectors, Networks, Navigation systems, Telecommunications

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Proceedings Article | 13 December 2022 Paper

Paper

High-precision measurement of the center frequencies of the hydrogen cyanide (HCN) hyperfine transitions in the 1.5 μm wavelength band

Martin Hošek, Šimon Řeřucha, Jan Hrabina, Martin Čížek, Lenka Pravdová, Ondřej Číp

Proceedings Volume 12502, 1250213 (2022) https://doi.org/10.1117/12.2664209

KEYWORDS: Absorption, Frequency combs, Hydrogen, Cyanide, Absorption spectroscopy, Modulation, Spectroscopy

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Proceedings Article | 13 December 2022 Paper

Paper

National infrastructure for dissemination of precise time and interconnection of quantum sources of ultra-stable optical frequency CITAF

Josef Vojtech, Ondrej Havlis, Martin Slapak, Lada Altmannova, Vladimir Smotlacha, Petr Pospisil, Jan Kundrat, Rudolf Vohnout, Radek Velc, Elisabeth Andriantsarazo, Martin Cizek, Jan Hrabina, Simon Rerucha, Lenka Pravdova, Josef Lazar, Ondrej Cip, Alexander Kuna, Jaroslav Roztocil

Proceedings Volume 12502, 125020R (2022) https://doi.org/10.1117/12.2663805

KEYWORDS: Optical amplifiers, Time metrology, Quantum key distribution, Optical fibers, Connectors, Signal attenuation, Semiconductor optical amplifiers, Fiber amplifiers, Clocks

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Proceedings Article | 13 December 2022 Paper

Paper

Measuring sensitivity of optical frequency transfers to acoustic vibrations in photonic networks

Martin Cizek, Lenka Pravdova, Jan Hrabina, Ondrej Cip

Proceedings Volume 12502, 125020I (2022) https://doi.org/10.1117/12.2663961

KEYWORDS: Acoustics, Buildings, Signal processing, Interferometers, Optical fibers, Interferometry, Spectrum analysis, Phase measurement, Network security

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Proceedings Article | 13 December 2022 Paper

Paper

Optical cavity for ultra-narrow linewidth laser system

L. Pravdová, J. Hrabina, M. Čížek, O. Čip, F. Procháska, J. Beneš

Proceedings Volume 12502, 1250204 (2022) https://doi.org/10.1117/12.2664193

KEYWORDS: Resonators, Optical resonators, Laser resonators, Laser systems engineering, Laser optics, Optical design

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Proceedings Article | 30 September 2022 Paper

Paper

National research infrastructure for clock network services: CITAF

Josef Vojtech, Ondrej Havlis, Martin Slapak, Vladimir Smotlacha, Radek Velc, Petr Pospisil, Jan Kundrát, Lada Altmannova, Rudolf Vohnout, Martin Cizek, Jan Hrabina, Simon Rerucha, Lenka Pravdova, Josef Lazar, Ondrej Cip, Lukas Slodicka

Proceedings Volume 12233, 122330C (2022) https://doi.org/10.1117/12.2635013

KEYWORDS: Optical fibers, Optical amplifiers, Clocks, Time metrology, Optical networks, L band, Quantum key distribution

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Proceedings Article | 1 August 2021 Presentation + Paper

Presentation + Paper

Large scale infrastructure for precise time and frequency bidirectional transmission

Josef Vojtech, Ondrej Havlis, Martin Slapak, Vladimir Smotlacha, Tomas Horvath, Lada Altmannova, Radek Velc, Jan Kundrat, Rudolf Vohnout, Sarbojeet Bhowmick, Michal Hazlinsky, Martin Cizek, Jan Hrabina, Lenka Pravdova, Ondrej Cip, Jaroslav Roztocil

Proceedings Volume 11830, 1183002 (2021) https://doi.org/10.1117/12.2592328

KEYWORDS: Networks, Optical amplifiers, Telecommunications, Radio optics, Clocks, Optical networks, Signal detection, Semiconductor optical amplifiers, Optical clocks, Time metrology

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Proceedings Article | 19 April 2021 Poster + Presentation + Paper

Poster + Presentation + Paper

Towards Czech national research infrastructure for Clock Network Services

Josef Vojtech, Vladimir Smotlacha, Ondrej Havlis, Martin Slapak, Jan Kundrat, Sarbojeet Bhowmick, Rudolf Vohnout, Radek Velc, Lada Altmannova, Tomas Horvath, Martin Cizek, Jan Hrabina, Simon Rerucha, Lenka Pravdova, Josef Lazar, Ondrej Cip, Alexander Kuna, Jaroslav Roztocil

Proceedings Volume 11772, 117721H (2021) https://doi.org/10.1117/12.2589156

KEYWORDS: Clocks, Precision optics, Optical fibers, Metrology, Time metrology, Photonics, Optical networks, Electronics, Electrical engineering

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Proceedings Article | 20 August 2020 Presentation + Paper

Presentation + Paper

Infrared dissemination of precise time and frequency over optical fibers in Europe

Josef Vojtech, Vladimir Smotlacha, Martin Slapak, Jan Kundrat, Rudolf Vohnout, Radek Velc, Ondrej Havlis, Martin Cizek, Jan Hrabina, Lenka Pravdova, Ondrej Cip, Jaroslav Roztocil

Proceedings Volume 11502, 115020N (2020) https://doi.org/10.1117/12.2568002

KEYWORDS: Optical fibers, Networks, Clocks, Time metrology, Metrology, Optical networks, Telecommunications, Optical clocks, Frequency metrology

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Proceedings Article | 9 September 2019 Presentation + Paper

Presentation + Paper

Alternative spectral windows for photonic services distribution

Josef Vojtech, Ondrej Havlis, Martin Slapak, Sarbojeet Bhowmick, Jan Radil, Petr Munster, Tomas Horvath, Radek Velc, Jan Kundrat, Lada Altmannova, Vladimir Smotlacha, Rudolf Vohnout, Jan Hrabina, Martin Cizek, Lenka Pravdova, Simon Rerucha, Ondrej Cip, Radan Slavik, Libor Marecek, Pavel Skoda, Michal Hazlinsky

Proceedings Volume 11128, 1112806 (2019) https://doi.org/10.1117/12.2529713

KEYWORDS: Remote sensing, Time metrology, L band, Optical fibers, Optical amplifiers, Signal attenuation, Wavelength division multiplexing, S band, Modulation, Single mode fibers, Fiber amplifiers, Dense wavelength division multiplexing

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Proceedings Article | 18 December 2018 Paper

Paper

Optical amplification for quantum sources of ultra-stable optical frequency

Josef Vojtech, Ondrej Havlis, Martin Slapak, Jan Radil, Petr Munster, Tomas Horvath, Lada Altmannova, Radek Velc, Jan Kundrat, Rudolf Vohnout, Pavel Skoda, Michal Altmann, Vladimir Smotlacha, Michal Hazlinsky, Ondrej Cip, Martin Cizek, Jan Hrabina, Lenka Pravdova, Vaclav Hucl, Simon Rerucha

Proceedings Volume 10976, 109760Q (2018) https://doi.org/10.1117/12.2513641

KEYWORDS: Optical amplifiers, Fiber amplifiers, Data transmission, Interference (communication), Photons, Semiconductor optical amplifiers, Quantum optics, S band

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Proceedings Article | 18 December 2018 Paper

Paper

Investigating the use of the hydrogen cyanide (HCN) as an absorption media for laser spectroscopy

Martin Hošek, Šimon Řeřucha, Lenka Pravdová, Martin Čížek, Jan Hrabina, Ondřej Číp

Proceedings Volume 10976, 1097605 (2018) https://doi.org/10.1117/12.2517761

KEYWORDS: Absorption, Laser optics, Laser stabilization, Frequency combs, Laser spectroscopy

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Proceedings Article | 18 December 2018 Paper

Paper

Optical frequency transfers between ISI CAS and CESNET

Vaclav Hucl, Martin Cizek, Lenka Pravdova, Jan Hrabina, Michal Jelinek, Bretislav Mikel, Vladimir Smotlacha, Ondrej Havlis, Josef Vojtech, Josef Lazar, Ondrej Cip

Proceedings Volume 10976, 1097617 (2018) https://doi.org/10.1117/12.2518456

KEYWORDS: Fiber optics, Optical fibers, Bragg cells, Sensors, Radio optics, Doppler effect, Linear filtering, Fiber optics tests, Optical amplifiers, Temperature metrology

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Proceedings Article | 18 September 2018 Paper

Paper

Multi-purpose infrastructure for dissemination of precise stable optical frequency

Josef Vojtech, Ondrej Havlis, Martin Slapak, Radek Velc, Petr Munster, Tomas Horvath, Jan Kundrat, Vladimir Smotlacha, Jan Hrabina, Martin Cizek, Lenka Pravdova, Simon Rerucha, Ondrej Cip, Radan Slavik, Rudolf Vohnout, Jan Radil, Pavel Skoda, Lada Altmannova, Michal Altmann, Michal Hazlinsky

Proceedings Volume 10765, 1076507 (2018) https://doi.org/10.1117/12.2321333

KEYWORDS: Optical amplifiers, Optical fibers, Optical filters, Data transmission, Wavelength division multiplexing, Reflection

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Proceedings Article | 26 June 2017 Paper

Paper

Phase and group refractive indices of air calculation by fitting of phase difference measured using a combination of laser and low-coherence interferometry

Tomáš Pikálek, Martin Šarbort, Ondřej Číp, Minh Tuan Pham, Adam Lešundák, Lenka Pravdová, Zdeněk Buchta

Proceedings Volume 10329, 103293I (2017) https://doi.org/10.1117/12.2269952

KEYWORDS: Glasses, Laser beam propagation, Refractive index, Interferometry, Laser interferometry

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SPIE Journal Paper | 6 February 2017 Open Access

Open Access

Joint accurate time and stable frequency distribution infrastructure sharing fiber footprint with research network

Josef Vojtech, Martin Slapak, Pavel Skoda, Jan Radil, Ondrej Havlis, Michal Altmann, Petr Munster, Radek Velc, Jan Kundrat, Lada Altmannova, Rudolf Vohnout, Tomas Horvath, Miloslav Hula, Vladimir Smotlacha, Martin Cizek, Lenka Pravdova, Simon Rerucha, Jan Hrabina, Ondrej Cip

OE, Vol. 56, Issue 02, 027101, (February 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.2.027101

KEYWORDS: Bragg cells, Picosecond phenomena, Optical amplifiers, Fiber amplifiers, Wavelength division multiplexing, Optical fibers, Transmitters, Optical engineering, Calibration, Fiber Bragg gratings

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Proceedings Article | 23 December 2016 Paper

Paper

Length measurement in absolute scale via low-dispersion optical cavity

Lenka Pravdova, Adam Lesundak, Radek Smid, Jan Hrabina, Simon Rerucha, Ondrej Cip

Proceedings Volume 10142, 101420T (2016) https://doi.org/10.1117/12.2264452

KEYWORDS: Optical resonators, Frequency combs, Mirrors, Interferometers, Actuators, Femtosecond phenomena, Ferroelectric materials, Optical testing, Silver, Distance measurement

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Proceedings Article | 23 December 2016 Paper

Paper

Simultaneous transfer of optical frequency and time over 306 km long-haul optical fibre link

Vaclav Hucl, Martin Cizek, Lenka Pravdova, Simon Rerucha, Jan Hrabina, Bretislav Mikel, Vladimir Smotlacha, Josef Vojtech, Josef Lazar, Ondrej Cip

Proceedings Volume 10142, 101420M (2016) https://doi.org/10.1117/12.2264514

KEYWORDS: Optical fibers, Fiber Bragg gratings, Sensors, Sensor networks, Doppler effect, Optical amplifiers, Laser processing, Calibration, Optical clocks, Absorption spectroscopy

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Proceedings Article | 22 June 2015 Paper

Paper

Length characterization of a piezoelectric actuator travel with a mode-locked femtosecond laser

Lenka Pravdová, Adam Lešundák, Václav Hucl, Martin Čížek, Břetislav Mikel, Jan Hrabina, Šimon Řeřucha, Ondřej Číp, Josef Lazar

Proceedings Volume 9525, 95254K (2015) https://doi.org/10.1117/12.2190745

KEYWORDS: Femtosecond phenomena, Mirrors, Frequency combs, Transducers, Distance measurement, Resonators, Ferroelectric materials, Actuators, Linear filtering, Mode locking

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Showing 5 of 20 publications

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