Mr. Petr Varák Profile

Petr Varák

at Institute of Photonics and Electronics of the CAS vvi

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Author

Publications (14)

Proceedings Article | 20 June 2024 Presentation

Nanoparticle doping method for highly thulium-doped optical fibers for efficient, eye-safe fiber lasers – A fluorescence lifetime study

Petr Varák, Michal Kamradek, Jan Aubrecht, Ondrej Podrazký, Ivo Barton, Ivan Kašík, Pavel Peterka, Pavel Honzátko

Proceedings Volume PC13001, PC1300101 (2024) https://doi.org/10.1117/12.3014695

KEYWORDS: Doping, Nanoparticles, Fluorescence, Fiber lasers, Optical fibers, Ions, Spectroscopy, Fluorescence spectroscopy, Chromium, Solubility

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Proceedings Article | 12 March 2024 Paper

Dual-wavelength fiber lasers based on active fibers with structured cores

Pavel Peterka, Ivo Bartoň, Petr Vařák, Marcin Franzcyk, Jan Aubrecht, Rafal Kasztelanic, Michal Kamrádek, Dariusz Pysz, Ondřej Podrazký, Ivan Kašík, Ryszard Buczynski

Proceedings Volume 12865, 1286512 (2024) https://doi.org/10.1117/12.3000800

KEYWORDS: Fiber lasers, Structured optical fibers, Ytterbium, Erbium, Heat treatments, Single mode fibers, Photonics, Photonic nanostructures

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Proceedings Article | 30 May 2023 Presentation + Paper

Temperature-dependence of cross-relaxation coefficient of the thulium-doped silica fibers

Bára Jiříčková, Ondřej Schreiber, Petr Varak, Martin Grábner, Jan Aubrecht, Pavel Peterka

Proceedings Volume 12573, 125730H (2023) https://doi.org/10.1117/12.2666642

KEYWORDS: Fluorescence, Thulium, Optical fibers, Energy transfer, Fiber lasers, Silica, Quantum processes, Spectroscopy

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Proceedings Article | 30 May 2023 Paper

Nanocrystalline ceramic coatings for the capillary fiber lasers

Ondrej Podrazky, Jan Mrázek, Petr Vařák, Jana Proboštová, Ivo Bartoň, Ivan Kašík

Proceedings Volume 12573, 125730X (2023) https://doi.org/10.1117/12.2665632

KEYWORDS: Capillaries, Luminescence, Nanocrystals, Holmium, Silica, Thin films, Optical properties, Glasses, Fiber lasers, Thin film coatings

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Proceedings Article | 30 May 2023 Poster + Paper

Optimization of erbium and ytterbium concentration in nanostructured core fiber for dual-wavelength fiber lasers

I. Barton, M. Franczyk, P. Peterka, J. Aubrecht, P. Vařák, M. Kamrádek, O. Podrazký, R. Kasztelanic, R. Buczynski, I. Kašík

Proceedings Volume 12573, 1257311 (2023) https://doi.org/10.1117/12.2666703

KEYWORDS: Ytterbium, Erbium, Fiber lasers, Laser nanostructuring, Silica, Refractive index, Nanostructuring, Ions, Cladding

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Proceedings Article | 30 May 2023 Poster + Paper

Luminescence lifetime of Er-doped silica optical fibers: the role of composition and fabrication processing

Petr Vařák, Ivan Kašík, Pavel Peterka, Jan Aubrecht, Jan Mrázek, Michal Kamradek, Ondrej Podrazky, Ivo Barton, Marcin Franczyk, Ryszard Buczynski, Pavel Honzatko

Proceedings Volume 12573, 1257310 (2023) https://doi.org/10.1117/12.2666162

KEYWORDS: Erbium, Ions, Fluorescence, Optical fibers, Fabrication, Silica, Luminescence, Aluminum, Refractive index, Glasses

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Proceedings Article | 30 May 2022 Poster

Evaluation of aerodynamic levitation laser heating technique for synthesis of silicate glasses with gold nanoparticles

Jan Baborak, Alessio Zandona, Petr Varak, Maureen Yembele, Pavla Nekvindova, Mathieu Allix, Emmanuel Veron, Michael Pitcher, Cécile Genevois

Proceedings Volume PC12143, PC1214319 (2022) https://doi.org/10.1117/12.2621952

KEYWORDS: Gold, Nanoparticles, Glasses, Silicate glass, Nanostructures, Aerodynamics, Plasmonics, Ultrafast phenomena, Surface plasmons, Waveguides

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Proceedings Article | 25 May 2022 Poster + Paper

Photoluminescence of Er/Yb-doped zinc-silicate glass and glass ceramics with ZnO and Zn2SiO4 nanoparticles

Petr Varak, Jan Baborak, Jakub Cajzl, Pavla Nekvindova

Proceedings Volume 12142, 1214213 (2022) https://doi.org/10.1117/12.2620488

KEYWORDS: Glasses, Luminescence, Crystals, Ions, Zinc oxide, Erbium, Heat treatments, Sodium, Zinc, Potassium

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Proceedings Article | 19 May 2022 Presentation + Paper

The effect of fiber fabrication process on the photoluminescence properties of RE-doped optical fiber preforms and fibers

Petr Vařák, Ivan Kašík, Pavel Peterka, Jan Aubrecht, Jan Mrázek, Michal Kamrádek, Ondřej Podrazky, Ivo Bartoň, Ryszard Buczynski, Marcin Franczyk, Pavel Honzátko

Proceedings Volume 12140, 1214005 (2022) https://doi.org/10.1117/12.2620487

KEYWORDS: Luminescence, Optical fibers, Ions, Holmium, Aluminum, Heat treatments, Nanoparticles, Silica, Refractive index, Diffusion

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Proceedings Article | 4 March 2022 Presentation + Paper

The effect of thermal and mechanical processing on the fluorescence lifetime of Yb-doped silica preforms and fibers for use in nanostructured-core fiber lasers

Petr Vařák, Ivan Kašík, Pavel Peterka, Jan Mrázek, Michal Kamrádek, Jan Aubrecht, Ondřej Podrazký, Ivo Bartoň, Marcin Franczyk, Ryszard Buczynski, Pavel Honzátko

Proceedings Volume 11981, 1198103 (2022) https://doi.org/10.1117/12.2608684

KEYWORDS: Optical fibers, Luminescence, Ytterbium, Ions, Aluminum, Silica, Nanoparticles, Heat treatments, Refractive index, Thermal effects

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Proceedings Article | 18 April 2021 Presentation

Energy transfer coefficients in thulium-doped silica fibers

Michal Kamradek, Pavel Peterka, Jakub Cajzl, Petr Vařák, Jan Aubrecht, Ondřej Podrazký, Pavel Honzátko, Ivan Kašík

Proceedings Volume 11773, 117730I (2021) https://doi.org/10.1117/12.2590205

KEYWORDS: Optical fibers, Fiber lasers, Energy transfer, Luminescence, Modeling, Chromium, Thulium, Telecommunications, Silica, Photons

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Proceedings Article | 18 April 2021 Poster + Presentation + Paper

Nanocrystalline ZrO2-doped active optical fibers for fiber lasers operating at 2 μm

P. Vařák, J. Mrázek, W. Blanc, J. Aubrecht, M. Kamrádek, O. Podrazký, P. Honzátko

Proceedings Volume 11773, 1177317 (2021) https://doi.org/10.1117/12.2589127

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Proceedings Article | 1 April 2020 Presentation + Paper

Holmium-doped optical fibers for efficient fiber lasers

M. Kamrádek, I. Kašík, J. Aubrecht, J. Mrázek, O. Podrazký, J. Cajzl, P. Varák, V. Kubeček, P. Peterka, P. Honzátko

Proceedings Volume 11355, 113550C (2020) https://doi.org/10.1117/12.2559176

KEYWORDS: Fiber lasers, Holmium, Nanoparticles, Optical fibers, Silica

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Proceedings Article | 16 April 2019 Paper

High-power laser tests of phosphate glass-based bioresorbable optical fibers transmission

Pavel Peterka, Michael Písařík, Hana Turčičová, Jitka Černohorská, Ondřej Podrazký, Pavel Honzátko, Petr Vařák, Diego Pugliese, Nadia Boetti, Duccio Gallichi-Nottiani, Davide Janner, Daniel Milanese

Proceedings Volume 11029, 1102911 (2019) https://doi.org/10.1117/12.2523188

KEYWORDS: Optical fibers, Fiber lasers, Continuous wave operation, High power lasers, Silica, Sensors, Pulsed laser operation, Optical testing, Structured optical fibers

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Showing 5 of 14 publications

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