Michal Kamrádek, Ph.D.

Michal Kamrádek
Position: 
Postdoctoral fellow
Team: 
Fiber lasers and non-linear optics
Phone: 
+420 266 773 558
E-mail: 
kamradek@ufe.cz
Location: 
Dislocated laboratory, Praha 6 - Lysolaje

Research interests:

Materials and methods for optical fibers preparation and their characterization.

Professional activities:

07/2022 – today: Institute of Photonics and Electronics of the Czech Academy of Sciences, Postdoctoral Fellow

10/2016 – 06/2022: Institute of Photonics and Electronics of the Czech Academy of Sciences, Ph.D. student

01/2016 – 09/2016: Institute of Photonics and Electronics of the Czech Academy of Sciences, Research staff member

Education:

2016 – 2022: postgradual study at the Faculty of Nuclear Sciences and Physical Engineering at the Czech Technical University in Prague, Dissertation thesis: “Preparation and characterization of rare-earth-doped optical fibers for fiber lasers operating around 2 micrometers”

2010 – 2012: master’s study at the Institute of Chemical Technology in Prague, Diploma thesis: “The Influence of Chloride Ions on Electrocatalytical Activity of Conducting Polymer/Pt Composite”, graduated in June 2012, with honours, attained M.Sc. degree

2007 – 2010: Bachelor study at the Institute of Chemical Technology in Prague, Bachelor’s thesis: “The Kinetics of Reduction of Tetraamminecopper(II) Ion by Hydrazine and Hydroxylamine”, graduated in October 2010, with honours, attained B.Sc. degree

Current research projects:

Member of the projects:

Selected past projects:

Publications:

Journal papers

  1. P. Vařák, M. Leich,  M. Kamrádek, J. Aubrecht, O. Podrazký, I. Bartoň, B. Švejkarová, A. Michalcová, K. Wondraczek, M. Jäger, I. Kašík, P. Peterka, P. Honzátko, “Nanoparticle doping and molten-core methods towards highly thulium-doped silica fibers for 0.79 μm-pumped 2 μm fiber lasers – A fluorescence lifetime study”, Journal of Luminescence, Volume 275, November 2024, 120835, Link
  2. Jan Aubrecht, Jan Pokorný, Bára Švejkarová, Michal Kamrádek, and Pavel Peterka, "Broadband thulium fiber amplifier for spectral region located beyond the L-band," Opt. Express 32, 17932-17941 (2024). Link
  3. Jan Pokorný, Jan Aubrecht, Michal Kamrádek, Bára Švejkarová, Petr Vařák, Martin Grábner, and Pavel Peterka, "Depressed-cladding thulium-doped fiber for applications below 1800 nm," Opt. Express 32, 17966-17976 (2024). Link
  4. P. Vařák, M. Kamrádek, J. Aubrecht, O. Podrazký, J. Mrázek, I. Bartoň, A. Michalcová, M. Franczyk, R. Buczyňski, I. Kašík, P. Petereka, P. Honzátko. Heat treatment and fiber drawing effect on the matrix structure and fluorescence lifetime of Er- and Tm-doped silica optical fibers. Vol. 14, No. 4 / 1 Apr 2024 / Optical Materials Express (2024). Link
  5. Maria Michalska, Pavel Honzatko, Pawel Grzes, Michal Kamradek, Ondrej Podrazky, Ivan Kasik, and Jacek Swiderski, Thulium-Doped 1940- and 2034-nm Fiber Amplifiers: Towards Highly Efficient, High-Power All-Fiber Laser Systems, Journal of Lightwave Technology, vol. 42, no. 1, pp. 339-346, Jan.1, 2024. Link
  6. Pavel Peterka, Jan Aubrecht, Dariusz Pysz, Marcin Franczyk, Ondřej Schreiber, Michal Kamrádek, Ivan Kasik, and Ryszard Buczyński, "Development of pedestal-free large mode area fibers withTm3+ doped silica nanostructured core," Opt. Express 31, 43004-43016 (2023) Link
  7. P. Vařák, M. Kamrádek, J. Mrázek, O. Podrazký, J. Aubrecht, P. Peterka, P. Nekvindová, I. Kašík. Luminescence and laser properties of RE-doped silica optical fibers: The role of composition, fabrication processing, and inter-ionic energy transfers. Optical Materials: X, Vol. 15, 100177 (2022). Link
  8. P. Vařák, I. Kašík, P. Peterka, J. Aubrecht, J. Mrázek, M. Kamrádek, O. Podrazký, I. Bartoň, M. Franczyk, R. Buczynski, P. Honzátko. Heat treatment and fiber drawing effect on the luminescence properties of RE-doped optical fibers (RE = Yb, Tm, Ho). Optics Express Vol. 30, Issue 6, pp. 10050-10062 (2022). Link
  9. P. Vařák, J. Mrázek, A. A. Jasim, S. Bysakh, A. Dhar, M. Kamrádek, O. Podrazký, I. Kašík, I. Bartoň, P. Nekvindová „Thermal stability and photoluminescence properties of RE-doped (RE = Ho, Er, Tm) alumina nanoparticles in bulk and fiber-optic silica glass,“ Optical Materials, Vol. 118, 111239, (2021). Link
  10. M. Kamrádek, J. Aubrecht, P. Vařák, J. Cajzl, V. Kubeček, P. Honzátko, I. Kašík, P. Peterka “Energy transfer coefficients in thulium-doped silica fibers,” Optical Materials Express, Vol. 11, 1805, (2021). Link
  11. A. A. Jasim, P. Peterka, O. Podrazký, M. Kamrádek, F. Todorov, P. Honzátko “Efficient approach to designing low OH diffusion in the thermally shaped double-clad fibers,” Optical Fiber Technology, Vol. 63, 102513, (2021). Link
  12. F. Todorov, J. Aubrecht, P. Peterka, O. Schreiber, A. A. Jasim, J. Mrázek, O. Podrazký, M. Kamrádek, N. Kanagaraj, M. Grábner, Y. Baravets, J. Cajzl, P. Koška, A. Fišar, I. Kašík, P. Honzátko "Active Optical Fibers and Components for Fiber Lasers Emitting in the 2-μm Spectral Range", Materials, 13, 5177 (2020). Link.
  13. P. Vařák, J. Mrázek, W. Blanc, J. Aubrecht, M. Kamrádek, O. Podrazký “Preparation and properties of Tm-doped SiO2-ZrO2 phase separated optical fibers for use in fiber lasers”, Optical Materials Express, Vol. 10, Issue 6 (2020). Link.
  14. A. A. Jasim, O. Podrazký, P. Peterka, M. Kamrádek, I. Kašík, P. Honzátko “Impact of shaping optical fiber preforms based on grinding and a CO2 laser on the inner-cladding losses of shaped double-clad fibers”, Optics Express, Vol. 28, Issue 9, (2020). Link
  15. J. Aubrecht, P. Peterka, P. Honzátko, O. Moravec, M. Kamrádek, I. Kašík “Broadband thulium-doped fiber ASE source”, Optics Letters, Vol. 45, No. 8 (2020). Link.
  16. I. Kašík, Vl. Matějec, M. Hayer, M. Kamrádek, O. Podrazký, J. Mrázek, P. Peterka, P. Honzátko „Glass materials for optical fibers”, Ceramics-Silikáty 64 (1), 29-34 (2020). Link.
  17. I. Kašík, V. Matějec, O. Podrazký, J. Mrázek, M. Kamrádek, P. Peterka, J. Aubrecht, F. Todorov, P. Honzátko, "Pokroky v oblasti optických vláken v ČR", Jemná mechanika a optika (2019). Link.
  18. I. Kasik, M. Kamradek, J. Aubrecht, P. Peterka, O. Podrazky, J. Cajzl, J. Mrazek, P. Honzatko, "Thulium-doped optical fibers for fiber lasers operating around 2 µm", B. Pol. Acad. Sci-tech. (2019). Link.
  19. M. Kamrádek, I. Kašík, J. Aubrecht, J. Mrázek, O. Podrazký, J. Cajzl, P. Vařák, V. Kubeček, P. Peterka, P. Honzátko, "Nanoparticle and solution doping for efficient holmium fiber lasers", IEEE Photonics Journal (2019). Link.
  20. K. Nithyanandan, A. Theodosiou, J. Aubrecht, P. Peterka, M. Kamrádek, K. Kalli, I. Kašík, P. Honzátko, "All fiber mode-locked thulium-doped fiber laser using a novel femtosecond-laser-inscribed 45°-plane-by-plane-tilted fiber grating", Laser Phys. Lett. 16, 095104 (2019). Link.

Conference papers

  1. P. Peterka, I. Bartoň, P. Vařák, M. Franzcyk, J. Aubrecht, R. Kasztelanic, M. Kamrádek, D. Pysz, O. Podrazký, I. Kašík, and R. Buczynski, "Dual-wavelength fiber lasers based on active fibers with structured cores [Invited]," in Proc SPIE Photonics West, Fiber Lasers XXI: Technology and Systems, San Francisco, USA, 26 January - 1 February 2024, p. 1286512. https://doi.org/10.1117/12.3000800

  2. F. Todorov, M. Kamrádek, I. Kašík, “Rare-Earth-Doped Silica Optical Fibers and All-Fiber Lasers Operating in the 2-µm Spectral Range,” in 2023 23rd International Conference on Transparent Optical Networks (ICTON), Jul. 2023, p. Mo.D6.2, Bucharest, Romania, doi: 10.1109/ICTON59386.2023.10207512

  3. P. Vařák, J. Mrázek, W. Blanc, J. Aubrecht, M. Kamrádek, O. Podrazký, P. Honzátko, "Nanocrystalline ZrO2-doped active optical fibers for fiber lasers operating at 2 μm," Proc. SPIE 11773, Micro-structured and Specialty Optical Fibres VII, 1177317 (18 April 2021); doi: 10.1117/12.2589127

  4. M. Kamrádek, I. Kašík, J. Aubrecht, J. Mrázek, O. Podrazký, J. Cajzl, P. Vařák, P. Peterka, P. Honzátko, "Holmiem dopované vláknové lasery", Laser 59 (2019).
  5. P. Peterka, P. Koška, A. Jasim, N. Kanagaraj, J. Aubrecht, M. Kamrádek, O. Podrazký, F. Todorov, I. Kašík and P. Honzátko, "Enhanced pump absorption efficiency in coiled and twisted double-clad fibers for fiber lasers", International Conference on Transparent Optical Networks, Angers, France (2019). 
  6. A. A. Jasim, J. Aubrecht, P. Peterka, M. Kamrádek, O. Podrazký, F. Todorov, I. Kašík and P. Honzátko, "Efficient Pump Absorption in Twisted Double Clad Thulium-Doped Fibers Drawn of CO2 Laser Shaped Preform", CLEO Europe, Munich, Germany (2019). 
  7. M. Kamradek, I. Kasik, P. Peterka, J. Aubrecht, P. Honzatko, O. Podrazky, J. Mrazek, V. Kubecek, "Silica- and germanate-based glasses doped with rare-earth elements for photonics devices", International Glass Congress, Boston, USA (2019).
  8. M. Kamrádek, J. Aubrecht, P. Peterka, O. Podrazký, P. Honzátko, J. Cajzl, J. Mrázek, V. Kubeček, I. Kašík, "Spectroscopic characterization of holmium-doped optical fibers for fiber lasers“, SPIE Optics + Optoelectronics, Prague, Czech Republic (2019). Link.
  9. I. Kašík, M. Kamradek, P. Peterka, J. Aubrecht, P. Honzatko, O. Podrazky, J. Mrazek, V. Kubecek, "Silica and germanate-based rare-earth doped glasses for fiber lasers", SPIE Optics + Optoelectronics, Prague, Czech Republic (2019).
  10. J. Aubrecht, P. Peterka, P. Honzátko, O. Moravec, M. Kamrádek, I. Kašík: "Broadband ASE sources with flat output spectra without internal spectral flattening filter", Europhoton, Barcelona, Spain (2018).
  11. M. Kamrádek, I. Kašík, P. Peterka, J. Aubrecht, O. Podrazký, P. Honzátko, J. Mrázek, V. Kubeček, "Silica- and germanate-based rare earth doped glasses for fiber lasers", SPIE Photonics Europe, Strasbourg, France (2018). Link.
  12. M. Kamrádek, J. Aubrecht, P. Peterka, O. Podrazký, P. Honzátko, J. Cajzl, J. Mrázek, V. Kubeček, I. Kašík, "Spectroscopic study of silica optical fibers doped with holmium and thulium", International Glass Congress, Istanbul, Turkey (2017).
  13. J. Mrázek, I. Kašík, M. Kamrádek, J. Aubrecht, O. Podrazký, I. Bartoň, V. Matějec, P. Peterka, "Sol-gel route to holmium-doped SiO2-GeO2 glasses for photonic applications", International Glass Congress, Istanbul, Turkey (2017).
  14. M. Kamrádek, J. Aubrecht, P. Peterka, O. Podrazký, P. Honzátko, J. Cajzl, J. Mrázek, V. Kubeček, I. Kašík, "Thulium-doped optical fibers for fiber lasers", Photonics Prague, Prague, Czech Republic (2017). Link.
  15. J. Aubrecht, P. Peterka, P. Honzátko, F. Todorov, O. Podrazký, M. Kamrádek, J. Proboštová, I. Kašík, "Monolithic thulium-doped fiber laser", Photonics Prague, Prague, Czech Republic (2017). Link.
  16. J. Cajzl, P. Peterka, P. Honzátko, O. Podrazký, M. Kamrádek, J. Aubrecht, J. Proboštová, I. Kašík, "Evaluation of energy transfer coefficients in Tm-doped fibers for fiber lasers", Photonics Prague, Prague, Czech Republic (2017). Link.
  17. M. Kamrádek, J. Aubrecht, P. Peterka, O. Podrazký, P. Honzátko, J. Cajzl, J. Mrázek, V. Kubeček, I. Kašík, "Advanced photonic glasses doped with thulium or holmium", Slovak and Czech Glass Conference, Trenčianské Teplice, Slovakia (2017).
  18. M. Kamrádek, J. Aubrecht, P. Peterka, O. Podrazký, P. Honzátko, J. Cajzl, J. Mrázek, V. Kubeček and I. Kašík, "Spectral properties of thulium doped optical fibers for fiber lasers around 2 micrometers", SPIE Optics + Optoelectronics, Prague, Czech Republic (2017). Link.
  19. J. Aubrecht, P. Peterka, P. Koška, P. Honzátko, M. Jelínek, M. Kamrádek, M. Frank, V. Kubeček, I. Kašík, "Spontaneous laser-line sweeping in Ho-doped fiber laser", SPIE LASE, San Francisco, USA (2017). Link.
  20. J. Mrázek, I. Kašík, P. Peterka, J. Aubrecht, O. Podrazký, M. Kamrádek, J. Proboštová: "Ceramic-nanoparticles-doped active fibers for fiber lasers", Conference on Optical Fibers and Their Applications, Suprasl, Poland (2017).
  21. I. Kašík, J. Aubrecht, P. Peterka, O. Podrazký, J. Cajzl, J. Mrázek, P. Honzátko, J. Proboštová, M. Kamrádek, "Influence of RE3+ vicinity on luminescence properties of silica-based materials for lasers operating around 2 μm", Laser Ceramic Symposium, Saint-Louis, France (2016).

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