Ondřej Podrazký, Ph.D.

Professional activities:

2008 - Senior research fellow at the Institute of Photonics and Electronics, Academy Sciences of the Czech Republic.
2006 - 2007: Employed as a post-doc at the Institute of Photonics and Electronics of Czech Academy of Sciences. Concerned with research on preparation of special optical fibers for sensors and communications.
April 2003 – December 2005: Employed as a post-doc in Institute of Chemical Processes Fundamentals of Czech Academy of Sciences. Concerned with optical biosensors and monitoring of microorganisms by intrinsic fluorescence.
September 2001 – March 2002: Employed in Institute of Chemical Processes Fundamentals of Czech Academy of Sciences as a research assistant.

Scientific internship:

February - August 1999: Socrates/Erasmus stage at École des Mines d’Albi (France). The stage was oriented to an analysis of soil polluted by heavy metals

Materials for students:

Student materials from lectures can be found here

Education:

1998-2003: Doctoral study at Department of Environmental Chemistry of ICT Prague in cooperation with Institute of Chemical Processes Fundamentals of Czech Academy of Sciences Doctoral thesis: „Monitoring of Environmental Influence on Model Microorganism Cultures by Optical Methods” graduated in June 2003, received Ph.D. title

1993-1998: Institute of Chemical Technology Prague, Faculty of Environmental Technology, Department of Water Technology and Environmental Engineering. Diploma thesis: „Removal of Heavy Metals from Water Solutions by Means of Special Sorbents “ graduated in June 1998, received M.Sc. title.

Awards:

2010: The Visegrad Group Academies Young Researcher Award

Current projects:

Principal investigator of projects:

• Fiber optic pH meter for microscopic biological samples

Member of projects:

• Novel optical fibers and their spectroscopy for fiber lasers operating beyond 2 um
• European Action COST MP1401 Advanced fiber lasers
• Biomedical photonic devices for advanced medical diagnostics and therapy
• Novel silica-based Ho -doped nanomaterials for 2-μm-class fibre laser research

Selected past projects:

Principal investigator of the projects:

• Optical fibers with nano-structures core for optical amplification

Member of projects:

• eyesafe2u - Fiber optic components for "eye-safe" spectral region around 2 um
• Bragg fibers for delivery of high laser powers
• Tm-doped optical fibres for fibre lasers in 2 um spectral range
• Special glasses on the base of heavy metal oxides
• Benefit 7 - Rozvoj výzkumného týmu BIO-OPT-XUV na FBMI ČVUT
• Preparation and properties of silica-based optical glasses containing rare-earth- and chromium-doped nano-particles
• FILA - Compact high-power passively Q-switched all-fiber lasers
• scan4surf - Inline Process Metrology for Laser Structuring Systems (project of the European Micro and Nano Technology program MNT-ERA.net)
• Regulation of morphogenesis of plant cells and organs
• Design, preparation and characterization of novel types of optical microresonators for chemical detection
• Special glass materials for photonics applications
• Quasi single-mode optical fibers for telecommunications and distributed fiber-optic sensors
• Optical fibers modified by nanostructured photocatalytic layers with high activity in visible spectrum
• Thulium doped silica fibres for fibre amplifiers
• Novel approaches to reversible opto-electrochemical fibre sensing of chlorine in water
• Air-silica microstructure fibers for evanescent-wave chemical sensing

Patents:

• Pavel Peterka, Pavel Koska, Ondrej Podrazky, Vlastimil Matejec, Ivan Kasik, "Amplifying module, method of making the same, and cladding pumped optical device incorporating the module," CZ Pat. 305888, 9 March 2016.

Publications:

Books:

1. Kašík, O. Podrazký, J. Mrázek, J. Aubrecht, V. Matějec: „Chlorine in water“, R. Mangione, D. Carlyle (Eds.): „Chlorine: Properties, applications and health effects“, Nova Science Publishers, Inc., 2011, book chapter

Journal papers:

1. 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. 
2. Jan Aubrecht, Pavel Peterka, Pavel Koška, Ondřej Podrazký, Filip Todorov, Pavel Honzátko, and Ivan Kašík, "Self-swept holmium fiber laser near 2100 nm," Opt. Express 25, 4120-4125 (2017)
3. Peterka, P., Honzátko, P., Koška, P., Todorov, F., Aubrecht, J., Podrazký, O., Kašík, I. Reflectivity of transient Bragg reflection gratings in fiber laser with laser-wavelength self-sweeping: Erratum. Optics Express. 2016, 24 (14), 16222-16223.
4. Koška, P., Peterka, P., Aubrecht, J., Podrazký, O., Todorov, F., Becker, M., Baravets, Y., Honzátko, P., Kašík, I. Enhanced pump absorption efficiency in coiled and twisted double-clad thulium-doped fibers. Optics Express. 2016, 24 (1), 102-107.
5. Frank, M., Jelínek, M., Kubeček, V., Kašík, I., Podrazký, O., Matějec, V. Air and silica core Bragg fibers for radiation delivery in the wavelength range 0.6-1.5 um. Optical Fiber Technology. 2016, 31, 36-41.
6. Cui, Q., Podrazký, O., Mrázek, J., Proboštová, J., Kašík, I. Tapered-fiber optical sensor for physiological pH range. IEEE Sensors Journal, 2015, 15 (9), 4967-4973.
7. Mrázek, J., Kašík, I., Procházková, L., Čuba, V., Aubrecht, J., Cajzl, J., Podrazký, O., Peterka, P., Nikl, M. Active optical fibers doped with ceramic nanocrystals. Advances in Electrical and Electronic Engineering. 2014, 12 (6), 567-574.
8. Peterka, P., Honzátko, P., Koška, P., Todorov, F., Aubrecht, J., Podrazký, O., Kašík , I. Reflectivity of transient Bragg reflection gratings in fiber laser with laser-wavelength self-sweeping. Optics Express. 2014, 22 (24), 30024-30031.
9. Honzátko, P., Baravets, Y., Kašík, I., Podrazký, O. Wideband thulium-holmium-doped fiber source with combined forward and backward ASE at 1600-2300 nm spectral band. Optics Letters. 2014, 39 (12), 3650-3653.
10. Kašík, I., Podrazký, O., Mrázek, J., Cajzl, J., Aubrecht, J., Proboštová, J., Peterka, P., Honzátko, P., Dhar, A. Erbium and Al2O3 nanocrystals -doped silica optical fibers. Bulletin of the Polish Academy of Sciences, Technical Sciences. 2014, 62, 641-646. 
11. Podrazký, O., Matějec, V., Mrázek, J., Martan, T., Aubrecht, J., Kašík, I. Tapered optical fiber sensor for detection of pH in microscopic volumes. Sensors & Transducers. 2014, 27, 312-318.
12. Matějec, V., Bartoň, I., Mrázek, J., Podrazký, O. U-shaped fiber-optic detection elements for investigation of photocatalytic decomposition of toluene dissolved in water. Sensors & Transducers. 2014, 27, 244-252.
13. Martan, T., Aubrecht, J., Podrazký, O., Matějec, V., Kašík, I. Detection of hydrocarbons using suspended core microstructured optical fiber. Sensors and Actuators B-chemical. 2014, 202, 123-128.
14. Kašík, I., Podrazký, O., Mrázek, J., Martan, T., Matějec, V., Hoyerová, K., Kamínek, M. In vivo optical detection of pH in microscopic tissue samples of Arabidopsis thaliana. Materials Science & Engineering C. 2013, 33 (8), 4809-4815.
15. Peterka, P., Honzátko, P., Becker, M., Todorov, F., Písařík, M., Podrazký, O., Kašík, I. Monolithic Tm-doped fiber laser at 1951nm with deep-UV femtosecond-laser-induced FBG pair. IEEE Photonics Technology Letters. 2013, 25 (16), 1623-1625.
16. Dhar, A., Kašík, I., Podrazký, O., Matějec, V. Fabrication and properties of Er-doped nanocrystalline phase-seperated optical fibers. Advances in Electrical and Electronic Engineering. 2013, 11 (1), 29-35.
17. Dhar, A., Kašík, I., Dussardier, B., Podrazký, O., Matějec, V. Preparation and properties of Er–doped ZrO2 nanocrystalline phase-separated preforms of optical fibres by MCVD process.  International Journal of Applied Ceramic Technology. 2012, 9 (2), 341-348.

Conference papers:

1. Frank, M., Jelínek, M., Kubeček, V., Podrazký, O., Kašík, I., Matějec, V. Delivery of 1.9um laser radiation using air-core Bragg fibers. In: Wave and Quantum Aspects of Contemporary Optics (SPIE). 2016, 10142, p. 101421D-101421D-9.
2. Proboštová, J., Slánička, J., Mrázek, J., Podrazký, O., Benda, A., Peterka, P. Measurement of refractive index profile of non-symmetric, complex silica preforms with high refractive index differences. In: Micro-Structured and Specialty Optical Fibres IV (SPIE). 2016, 9886, p. 98861G-98861G-8.
3. Peterka, P., Honzátko, P., Koška, P., Podrazký, O., Kašík, I. Transient-fiber-Bragg grating spectra in self-swept Fabry-Perot fiber lasers. In: Fiber Lasers XII: Technology, Systems, and Applications (SPIE). 2015, 9344, p. 934423.
4. Podrazký, O., Mrázek, J., Vytykáčová, S., Proboštová, J., Kašík, I. Fiber-optic pH sensing system with microscopic spatial resolution. In: Optical Sensors 2015 (SPIE). 2015, 9506, p. 950612.
5. Aubrecht, J., Cajzl, J., Peterka, P., Honzátko, P., Podrazký, O., Todorov, F., Kašík, I. Characterisation of double-clad thulium-doped fibers with increased quantum conversion efficiency. In: Micro-structured and Specialty Optical Fibres IV (SPIE). 2015, 9507, p. 95070P.
6. Mrázek, J., Kašík, I., Boháček, J., Proboštová, J., Aubrecht, J., Podrazký, O., Cajzl, J., Honzátko, P. Special optical fibers doped with nanocrystalline holmium-yttrium titanates (HoxY1-x)2Ti2O7 for fiber-lasers. In: Micro-structured and Specialty Optical Fibres IV (SPIE). 2015, 9507, p. 950703.
7. Matějec, V., Podrazký, O., Kašík, I., Frank, M., Jelínek, M., Kubeček, V. Transmission of red-laser radiation by using Bragg fibers with air cores. In: Micro-structured and Specialty Optical Fibres IV (SPIE). 2015, 9507, p. 95070Q-95070Q-7. 
8. Cajzl, J., Peterka, P., Honzátko, P., Mrázek, J., Podrazký, O., Todorov, F., Gladkov, P., Sahu, J. K., Nunez-Valazquez, M., Nekvindová, P., Kašík, I. Characterization of fluorescence lifetime of Tm-doped fibers with increased quantum conversion efficiency. In: Photonics, Devices and Systems VI (SPIE). 2015, 9450, p. 9450171-9450178.
9. Podrazký, O., Kašík, I., Peterka, P., Aubrecht, J., Cajzl, J., Proboštová, J., Matějec, V. Preparation of optical fibers with non-circular cross-section for fiber lasers and amplifiers. In: Photonics, Devices and Systems VI (SPIE). 2015, 9450, p. 94501A1-94501A6.
10. Matějec, V., Podrazký, O., Kašík, I., Frank, M., Jelínek, M., Kubeček, V. Comparison of characteristics of Bragg fibers with silica and air cores. In: Photonics, Devices and Systems VI (SPIE). 2015, 9450, p. 94500Y.
11. Podrazký, O., Matějec, V., Kostka, P., Pedlíkova, J., Bašinová, N., Zavadil, J. Optical fibers of As2S3 glasses: Preparation and characterization. In: Photonics, Devices, and Systems VI (SPIE). 2015, 9450, p. 94501B1-94501B1.
12. Bartoň, I., Matějec, V., Mrázek, J., Podrazký, O. Preparation and characterization of coatings with a high reflectivity on planar substrates and inside silica tubes. In: Photonics, Devices, and Systems VI (SPIE). 2015, 9450, p. 945019.
13. Peterka, P., Honzátko, P., Kašík, I., Cajzl, J., Podrazký, O. Thulium-doped optical fibers and components for fiber lasers in 2 μm spectral range. In: Wave and Quantum Aspects of Contemporary Optics (SPIE). 2014, 9441, p. 94410B1-94410B6.
14. Jelínek, M., Frank, M., Kubeček, V., Matějec, V., Kašík, I., Podrazký, O. Air core Bragg fibers for delivery of near-infrared laser radiation. In: The International Society for Optical Engineering (SPIE). 2014, 9441, p. 94411B.
15. Mrázek, J., Nikl, M., Kašík, I., Podrazký, O., Aubrecht, J., Beitlerová, A. Nanoparticle-doped radioluminescent silica optical fibers. In: Optical Fibers and Their Applications (SPIE). 2014, 9228, p. 922805-1.
16. Cajzl, J., Podrazký, O., Mrázek, J., Aubrecht, J., Matějec, V., Peterka, P., Nekvindová, P., Kašík, I. The influence of nanostructured optical fiber core matrix on the optical properties of EDFA. In: Optics and Optoelectronics (SPIE).  2013, 8775, p. 8775-09.
17. Bobuskyy, V., Podrazký, O., Mrázek, J. Special optical fibers and fiber capillaries coated with Indium-Tin-Oxide. In: Optics and Optoelectronics (SPIE). 2013, 8775, p. 8775-0I.
18. Koška, P., Peterka, P., Kašík, I., Matějec, V., Podrazký, O. Double-clad rare-earth-doped fiber with cross-section tailored for splicing to the pump and signal fibers: analysis of pump propagation. In: Optics and Optoelectronics (SPIE). 2013, 8775, p. 8775-0V.
19. Matějec, V., Kašík, I., Podrazký, O., Aubrecht, J., Frank, M., Jelínek, M., Kubeček, V. Preparation and characterization of bragg fibers with air cores for transfer of laser radiation. In: Optics and Optoelectronics (SPIE). 2013, 8775, p. 8775-08.
20. Jelínek, M., Kubeček, V., Jelínková, H., Matějec, V., Kašík, I., Podrazký, O. Experimental investigation of high power picosecond 1.06 um pulse propagation in Bragg fibers. In: Nonlinear Optics and Applications (SPIE). 2013, 8772, p. 8772-1E.
21. Peterka, P., Todorov, F., Kašík, I., Matějec, V., Podrazký, O., Šašek, L., Mallmann, G., Schmitt, R. Wideband and high-power light sources for in-line interferometric diagnostics of laser structuring systems. In: Wave and Quantum Aspects of Contemporary Optics ( SPIE). 2012, 8697, p. 869718.