Pavel Koška, Ph.D.

Professional activities:

2008 - today:  Institute of Photonics and Electronics ,  Fiber lasers and non-linear optics, Ph.D student

Education:

2016: Ph.D. CTU in Prague, Faculty of Nuclear Sciences and Physical engineering, Department of Physical Electronics
Dissertation: Linear and nonlinear optical fiber microstructures finite element modeling

2014: MSc. CTU in Prague, Faculty of Electrical Engineering, Department of Microelectronics
Master’s degree project:  Hybrid Nelder-Mead - Particle Swarm Optimization

2008: MSc. CTU in Prague, Faculty of Nuclear Sciences and Physical engineering, Department of Physical Electronics
Master’s degree project:  Transient effects in Raman fiber amplifiers

Current research projects:

Member of projects:

• Self-sweeping of laser wavelength and associated instabilities of fiber lasers
• European Action COST MP1401 Advanced fiber lasers

Patents:

• P. Koška, P. Peterka, M. Písařík, "Mode field adapter for signal branch of pump and signal combiners, combiner, and optical device" Pat. CZ 305868.
• P. Peterka, P. Koška, O. Podrazky, V. Matějec, I. Kašík, "Amplifying module, method of making the same, and cladding pumped optical device incorporating the module" Pat. CZ 305888.

Publications:

Journal papers:

1. P. Koška, P. Peterka, J. Aubrecht, O. Podrazký, F. Todorov, M. Becker, Y. Baravets, P. Honzátko, I. Kašík: “Enhanced pump absorption efficiency in coiled and twisted doubleclad thulium-doped fibers,“ Optics Express 24(1): 102-107 (2016).
2. P. Koška, P. Peterka, V. Doya: “Numerical analysis of pump absorption in coiled and twisted double-clad fibers,“ IEEE J. Sel. Topics Quantum Electron., 22(2): 4401508 (2016).
3. P. Koška, P. Peterka: “Numerical analysis of pump propagation and absorption in specially tailored double-clad rare-earth doped fiber,“ Optical and Quantum Electronics 47(9): 3181-3191 (2015).
4. P. Koška, J. Petráček, P. Kwiecien, J. Luksch, I. Richter, J. Čtyroký: “Nonlinear nanophotonic and nanoplasmonic directional couplers: comparison of modelling methods,“ Optical and Quantum Electronics 47(9): 3201-3212 (2015).
5. P. Koška, Y. Baravets, P. Peterka, J. Bohata, and M. Pisarik, "Mode-field adapter for tapered-fiber-bundle signal and pump combiners," Applied Optics 54(4):751-756, 2015.
6. P. Peterka, P. Honzátko, P. Koška, F. Todorov, J. Aubrecht, O. Podrazký, and I. Kašík, "Reflectivity of transient Bragg reflection gratings in fiber laser with laser-wavelength self-sweeping," Opt. Express 22:30024-30031, 2014.

Conference papers:

1. P. Koška, P. Peterka, J. Aubrecht, O. Podrazky, F. Todorov, Y. Baravets, P. Honzatko, and I. Kasik, "Enhanced Pump Absorption Efficiency in Coiled and Twisted Double-Clad Thulium-Doped Fibers," in Advanced Solid State Lasers, OSA Technical Digest (online) (Optical Society of America, 2015), paper ATu2A.23.
2. P. Koška, Y. Baravets, P. Peterka, M. Písařík, and J. Bohata, "Optimized mode-field adapter for low-loss fused fiber bundle signal and pump combiners," Proc. SPIE 9344: 93442I, 2015.
   http://dx.doi.org/10.1117/12.2079905
3. P. Peterka, P. Honzátko, P. Koška, O. Podrazký, and I. Kašík, “Transient-fiber-Bragg grating spectra in self-swept Fabry-Perot fiber lasers,” SPIE 9344:934423, 2015. http://dx.doi.org/10.1117/12.2076359
4. P. Koska, J. Kanka, “Theoretical study of optical switching in multiple core nonlinear microstructured optical fibers“, Proc. SPIE. 8697, p. 86971H, 2012. Presented in 18th Czech-Polish-Slovak Optical Conference, 3 September 2012 through 7 September 2012, Ostravice, Czech Republic
5. P. Koska, P. Peterka, I. Kasik, V. Matejec, and O. Podrazky, "Double-clad rare-earth-doped fiber with cross-section tailored for splicing to the pump and signal fibers: analysis of pump propagation", Proc. SPIE. 8775, p. 87750V, 2013. Presented in SPIE Optics+Optoelectronics, 15-18 April 2013, Prague.