Dr. Filip Todorov Profile

Dr. Filip Todorov

Research scientist at Institute of Photonics and Electronics of the CAS, v.v.i.

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Publications (19)

Proceedings Article | 18 April 2021 Poster + Presentation + Paper

Thulium-doped fiber performance optimization via fiber bending and twisting and inner-cladding shape design

O. Schreiber, J. Aubrecht, A. A. Jasim, F. Todorov, P. Honzátko

Proceedings Volume 11773, 117731A (2021) https://doi.org/10.1117/12.2592309

KEYWORDS: Fiber lasers, Absorption, Cladding, Resonators, Carbon dioxide lasers, Signal attenuation, Semiconductor lasers, Optical fibers, Numerical modeling, Medicine

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Proceedings Article | 1 April 2020 Presentation

Reduction of water penetration into optical fiber preforms for improving preform shaping based on CO2 laser (Conference Presentation)

Ali Jasim, Ondrej Podrazký, Pavel Peterka, Michal Kamrádek, Filip Todorov, Pavel Honzátko

Proceedings Volume 11355, 113550B (2020) https://doi.org/10.1117/12.2555882

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Proceedings Article | 16 April 2019 Paper

Experimental investigation and characterization of fabrication shaped clad optical fiber by thermally polishing optical fiber preforms with CO2 laser

A. Jasim, O. Podrazký, P. Peterka, F. Todorov, P. Honzátko

Proceedings Volume 11029, 1102909 (2019) https://doi.org/10.1117/12.2520995

KEYWORDS: Optical fibers, Polishing, Gas lasers, Silica, Polymers, Carbon monoxide, Absorption, Carbon dioxide lasers, Surface finishing, Signal attenuation, High power fiber lasers

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Proceedings Article | 18 December 2018 Paper

Dynamic gratings induced by mode instabilities in fiber lasers

Pavel Peterka, Jan Aubrecht, Jakub Cajzl, Ondřej Podrazký, Filip Todorov, Ivan Kašík, Pavel Honzátko

Proceedings Volume 10976, 109760H (2018) https://doi.org/10.1117/12.2514458

KEYWORDS: Fiber lasers, Reflectivity, Fiber Bragg gratings, Laser applications, Refractive index, Laser stabilization, Fiber amplifiers, Optical amplifiers, Fabry–Perot interferometers

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Proceedings Article | 4 September 2018 Paper

Monolithic Er/Yb double-clad fibre laser with FBG inscribed using the direct-write plane-by-plane fs-laser inscription method

Jan Aubrecht , Antreas Theodosiou, Pavel Peterka, Ivan Kašík, Filip Todorov, Ondřej Moravec, Pavel Honzátko, Kyriacos Kalli

Proceedings Volume 10683, 1068304 (2018) https://doi.org/10.1117/12.2306522

KEYWORDS: Fiber Bragg gratings, Fiber lasers, Femtosecond phenomena, Erbium, Reflectivity, Kidney, Ytterbium, Absorption, Laser damage threshold, Cladding

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Proceedings Article | 1 December 2017 Paper

Fiber facet gratings for high power fiber lasers

Martin Vanek, Jan Vanis, Yauhen Baravets, Filip Todorov, Jiri Ctyroky, Pavel Honzatko

Proceedings Volume 10603, 106030J (2017) https://doi.org/10.1117/12.2293605

KEYWORDS: Reflectivity, Diffraction gratings, Finite-difference time-domain method, Fiber lasers, High power fiber lasers, Refractive index, Optical design, Waveguides, Polarization

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Proceedings Article | 1 December 2017 Paper

Monolithic thulium-doped fiber laser

J. Aubrecht, P. Peterka, P. Honzátko, F. Todorov, O. Podrazký, M. Kamrádek, J. Proboštová, I. Kašík

Proceedings Volume 10603, 106030L (2017) https://doi.org/10.1117/12.2292912

KEYWORDS: Fiber lasers, Optical fibers, Fiber Bragg gratings

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Proceedings Article | 16 May 2017 Paper

Anti-reflection and polarizing photonic structures for high-power fiber applications

Martin Vanek, Jan Vanis, Yauhen Baravets, Filip Todorov, Jiri Ctyroky, Pavel Honzatko

Proceedings Volume 10232, 102320W (2017) https://doi.org/10.1117/12.2271705

KEYWORDS: Diffraction gratings, Optical fibers, Ion beams, Fiber lasers, Reflectivity, Structured optical fibers, Numerical simulations, Finite-difference time-domain method, Polarization, Diffraction, Optical design

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Proceedings Article | 23 December 2016 Paper

High-power thulium-doped fiber laser in an all-fiber configuration

Yauhen Baravets, Filip Todorov, Pavel Honzatko

Proceedings Volume 10142, 101420G (2016) https://doi.org/10.1117/12.2263526

KEYWORDS: Fiber lasers, Thulium, Cladding, YAG lasers, Fiber Bragg gratings, Medicine, Semiconductor lasers, Surgery, Laser marking, Laser development

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Proceedings Article | 23 December 2016 Paper

Coherent sources for mid-infrared laser spectroscopy

Pavel Honzátko, Yauhen Baravets, Shyamal Mondal, Pavel Peterka, Filip Todorov

Proceedings Volume 10142, 1014202 (2016) https://doi.org/10.1117/12.2263504

KEYWORDS: Laser spectroscopy, Fiber lasers, Mid-IR, Absorption spectroscopy, Spectroscopy, Absorption, Modulation, Semiconductor lasers, Signal detection, Sensors

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Proceedings Article | 7 May 2015 Paper

Characterization of double-clad thulium-doped fiber with increased quantum conversion efficiency

Jan Aubrecht, Jakub Cajzl, Pavel Peterka, Pavel Honzátko, Pavel Koška, Yauhen Baravets, Martin Becker, Ondřej Podrazký, Filip Todorov, Ivan Kašík

Proceedings Volume 9507, 95070P (2015) https://doi.org/10.1117/12.2179630

KEYWORDS: Quantum efficiency, Fiber lasers, Optical fibers, Luminescence, Refractive index, Cladding, Thulium, Absorption, Fiber Bragg gratings, Ions

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Proceedings Article | 6 January 2015 Paper

Characterization of fluorescence lifetime of Tm-doped fibers with increased quantum conversion efficiency

Jakub Cajzl, Pavel Peterka, Pavel Honzátko, Jan Mrázek, Ondřej Podrazký, Filip Todorov, Petar Gladkov, Jayanta Sahu, Miguel Nunez-Velazquez, Pavla Nekvindová, Ivan Kašík

Proceedings Volume 9450, 945017 (2015) https://doi.org/10.1117/12.2070425

KEYWORDS: Optical fibers, Luminescence, Quantum efficiency, Thulium, Nanoparticles, Absorption, Refractive index, Aluminum, Doping, Silica

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Proceedings Article | 18 December 2012 Paper

Wideband and high-power light sources for in-line interferometric diagnostics of laser structuring systems

Pavel Peterka, Filip Todorov, Ivan Kašίk, Vlastimil Matějec, Ondřej Podrazký, Ladislav Šašek, Guilherme Mallmann, Robert Schmitt

Proceedings Volume 8697, 869718 (2012) https://doi.org/10.1117/12.2007388

KEYWORDS: Superluminescent sources, Laser systems engineering, Metrology, Interferometry, Light sources, Optical isolators, Laser metrology, Absorption, Diagnostics, Laser applications

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Proceedings Article | 11 October 2011 Paper

Preparation of spherical optical microresonators and their resonance spectra in air and gaseous acetone

Vlastimil Matějec, Filip Todorov, Michal Jelínek, Martin Fibrich, Miroslav Chomát, Vaclav Kubeček, Ivo Barton, Tomas Martan, Daniela Berková

Proceedings Volume 8306, 830605 (2011) https://doi.org/10.1117/12.910786

KEYWORDS: Microresonators, Silica, Spherical lenses, Liquids, Resonators, Optical fibers, Glasses, Temperature metrology, Sensors, Scattering

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Proceedings Article | 11 October 2011 Paper

Preparation and characterization of bottle optical microresonators with circular and hexagonal cross-sections

Filip Todorov, Jiří Čtyroký, Vlastimil Matějec, Miroslav Chomát, Daniela Berková, Ivan Kašík, Tomáš Martan, Václav Kubeček, Michal Jelínek, Martin Fibrich

Proceedings Volume 8306, 83060Q (2011) https://doi.org/10.1117/12.911986

KEYWORDS: Microresonators, Resonators, Optical fibers, Silica, Waveguides, Carbon dioxide lasers, Neck, Polarization, Refractive index, Fiber lasers

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Proceedings Article | 7 May 2011 Paper

Sensitivity of silica microspheres modified by xerogel layers to acetone and ethanol

Vlastimil Matějec, Filip Todorov, Michal Jelinek, Martin Fibrich, Miroslav Chomát, Václav Kubeček, Daniela Berková

Proceedings Volume 8073, 80730X (2011) https://doi.org/10.1117/12.886683

KEYWORDS: Microresonators, Silica, Bioalcohols, Prisms, Liquids, Optical spheres, Diodes, Optical fibers, Molecules, Capillaries

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Proceedings Article | 14 May 2010 Paper

Preparation and characterization of optical microspheres for refractive-index sensing

Filip Todorov, Michal Jelínek, Vlastimil Matejec, Miroslav Chomát, Václav Kubecek, Daniela Berková, Radek Sedlár

Proceedings Volume 7716, 77161X (2010) https://doi.org/10.1117/12.853839

KEYWORDS: Microresonators, Prisms, Silica, Polymers, Optical fibers, Optical spheres, Resonators, Fiber lasers, Carbon dioxide lasers, Sensors

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Proceedings Article | 26 November 2007 Paper

Bend insensitive long-period gratings written with a CO2 laser in fiber with parabolic-index cladding

Filip Todorov, Miroslav Chomát, Daniela Berková, Jirí Ctyroký, Vlastimil Matejec, Ivan Kašík, Jirí Dunovský, Alexandr Jancárek

Proceedings Volume 6830, 683005 (2007) https://doi.org/10.1117/12.756314

KEYWORDS: Cladding, Laser irradiation, Carbon dioxide lasers, Signal attenuation, Photonic integrated circuits, Fiber lasers, Mirrors, Optical fibers, Refraction, Manufacturing

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Proceedings Article | 16 May 2007 Paper

Long-period gratings with high insensitivity to external refractive index inscribed by using a CO₂ laser in fibers with parabolic-index cladding

Miroslav Chomát, Jiří Ctyroký, Daniela Berková, Vlastimil Matějec, Ivan Kašík, Jana Proboštová, Filip Todorov, Alexander Jančárek

Proceedings Volume 6585, 65850F (2007) https://doi.org/10.1117/12.723004

KEYWORDS: Optical fibers, Cladding, Refractive index, Photonic integrated circuits, Gas lasers, Refraction, Liquids, Signal attenuation, Carbon monoxide, Temperature metrology

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Showing 5 of 19 publications

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