Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Michal Kamrádek"'
Autor:
Petr Vařák, Michal Kamrádek, Jan Mrázek, Ondřej Podrazký, Jan Aubrecht, Pavel Peterka, Pavla Nekvindová, Ivan Kašík
Publikováno v:
Optical Materials: X, Vol 15, Iss , Pp 100177- (2022)
Silica glass doped with rare-earth ions remains one of the most frequently used materials for fiber lasers and amplifiers, owing to various advantages such as high thermal resistance, mechanical and chemical durability, high transparency up to 2.2 μ
Externí odkaz:
https://doaj.org/article/f6d1434d2cbb44959e1695f0c906590f
Autor:
Filip Todorov, Jan Aubrecht, Pavel Peterka, Ondřej Schreiber, Ali A. Jasim, Jan Mrázek, Ondřej Podrazký, Michal Kamrádek, Nithyanandan Kanagaraj, Martin Grábner, Yauhen Baravets, Jakub Cajzl, Pavel Koška, Adam Fišar, Ivan Kašík, Pavel Honzátko
Publikováno v:
Materials, Vol 13, Iss 22, p 5177 (2020)
Laser sources emitting in the infrared range at around 2 µm are attracting great interest for a variety of applications like processing of transparent thermoplastic polymers in industry as well as plenty of applications in medicine, spectroscopy, ga
Externí odkaz:
https://doaj.org/article/0d71101b15774accae7c17224e2cbb50
Autor:
Jan Aubrecht, Ondrej Podrazky, Jan Mrázek, Ivan Kašík, Michal Kamrádek, Pavel Peterka, Jakub Cajzl, Václav Kubeček, Petr Varak, Pavel Honzatko
Publikováno v:
IEEE Photonics Journal, Vol 11, Iss 5, Pp 1-10 (2019)
Efficient holmium fiber lasers have been studied as attractive laser sources operating around 2.1 μm. We report on holmium-doped silica fibers prepared by the modified chemical vapor deposition in combination with either a solution-doping method or
Autor:
Ryszard Buczynski, Tomasz Stefaniuk, Grzegorz Stepniewski, Michal Kamrádek, Adam Filipkowski, Tomasz Osuch, Alicja Anuszkiewicz, Ivan Kašík, Dariusz Pysz, Rafal Kasztelanic, Marcin Franczyk, Mariusz Klimczak, Jan Aubrecht, Pavel Peterka
Publikováno v:
Micro-structured and Specialty Optical Fibres VII.
Autor:
Petr Varak, Pavel Honzatko, Jan Aubrecht, Wilfried Blanc, Ondrej Podrazky, Michal Kamrádek, Jan Mrázek
Publikováno v:
Micro-structured and Specialty Optical Fibres VII.
In this work, phase-separated fibers of the system SiO2-ZrO2 doped by thulium and holmium ions were prepared by modified solution-doping method combined with MCVD. The ZrO2 concentration in both fibers was approx. 3 mol. %. The rare-earth ion concent
Autor:
Petr Vařák, Ivan Kašík, Michal Kamrádek, Ondřej Podrazký, Jan Mrázek, Pavel Peterka, Ryszard Buczynski, Marcin Franczyk, Pavel Honzátko
Publikováno v:
Laser Congress 2021 (ASSL,LAC).
Fluorescence lifetimes of Tm-doped optical fiber preform, elongated preform (cane), fiber and overclad fiber were investigated. The fluorescence lifetime decreased with additional steps of heat treatment, most likely due to diffusion and clustering m
Autor:
Pavel Peterka, Jan Aubrecht, Pavel Honzatko, Ivan Kašík, Pavel Koška, Ondřej Podrazký, Ivo Bartoň, Martin Grábner, Ali Abdulhadi Jasim, Filip Todorov, Nithyanandan Kanagaraj, Michal Kamrádek
Publikováno v:
9-й Международный семинар по волоконным лазерам: материалы семинара.
Autor:
Nithyanandan Kanagaraj, Jakub Cajzl, Jan Mrázek, Pavel Honzatko, Ondřej Schreiber, Jan Aubrecht, Michal Kamrádek, Adam Fišar, Yauhen Baravets, Filip Todorov, Ali Abdulhadi Jasim, Ivan Kašík, Pavel Koška, Ondřej Podrazký, Martin Grábner, Pavel Peterka
Publikováno v:
Materials
Materials, Vol 13, Iss 5177, p 5177 (2020)
Volume 13
Issue 22
Materials, Vol 13, Iss 5177, p 5177 (2020)
Volume 13
Issue 22
Laser sources emitting in the infrared range at around 2 µ
m are attracting great interest for a variety of applications like processing of transparent thermoplastic polymers in industry as well as plenty of applications in medicine, spectr
m are attracting great interest for a variety of applications like processing of transparent thermoplastic polymers in industry as well as plenty of applications in medicine, spectr
Autor:
Petr Vařák, Ivan Kašík, Pavel Peterka, Jan Aubrecht, Jan Mrázek, Michal Kamrádek, Ondřej Podrazký, Ivo Bartoň, Marcin Franczyk, Ryszard Buczynski, Pavel Honzátko
Publikováno v:
Optics Express. 30:10050
We investigate the influence of various optical fiber fabrication processes on the fluorescence decay of RE ions commonly used in fiber lasers and amplifiers, i.e. Yb3+, Tm3+ and Ho3+. Optical fiber preforms were prepared using the MCVD method combin
Autor:
Ivan Kašík, Jan Aubrecht, Ali Abdulhadi Jasim, Pavel Peterka, Pavel Honzatko, Ondrej Podrazky, Michal Kamrádek
Publikováno v:
ICTON
Double-clad (DC) active fibers are indispensable for modern high-power fiber lasers because they allow pumping of the active single-mode fiber core with small cross-section through the multi-mode inner cladding with large cross-section. To improve th