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Monocrystalline materials for high-power ultrafast lasers
Author(s): Jana Preclíková; Karel Bartoš; Jan Polák; Jan Kubát; Jan Pilař; Petr Navrátil; Martin Hanuš; Martin Divoký; Antonio Lucianetti; Martin Fibrich; Michal Košelja; Jonathan Tyler Green; Klaus Ertel; Jonathan Phillips; Mariastefania De Vido; Bedřich Rus; Tomáš Mocek; Jindřich Houžvička
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Paper Abstract

Crytur is a company with long tradition of growing and processing crystals for technical applications, with history reaching back to 1943. Recently we have developed Crystal Improved Growth (CRIG) method for production of large core-free single crystals of YAG. The diameter currently achieved is 140 mm (in case of undoped crystal), and the crystal weight is up to 10 kg. The method was used to grow un-doped YAG crystals, YAG:Ce crystals for large scintillating screens, and Yb:YAG and Nd:YAG for high power solid-state laser systems.

Large laser slabs were manufactured from Yb:YAG doped crystals for Diode-Pumped Solid State Laser (DPSSL) system Amos, which operates within Extreme Light Infrastructure in the Czech republic (ELI Beamlines). The dimension of the largest Yb:YAG laser slab produced is 120×120×8 mm, there is no visible stress under crossed polarizers and the wavefront distortion in the clear aperture region is smaller than λ/10 (λ=633 nm) in its Peak-to-Valley value. The edges of the slab are from diffusively bonded Cr:YAG cladding in order to suppress ASE (Amplified Spontaneous Emission).

In 2018 the performance of three sets of laser slabs (ø55x5 mm) with differently realized ASE suppression was characterized at cryogenic temperatures at HiLASE Centre in terms of small signal gain measurements as well as amplification test under 30 J pumping at 1 Hz and 10 Hz repetition rates. We provide data that show that the crystal slabs have comparable properties to the ceramic slabs (produced by Konoshima company, Japan) currently in use at HiLASE.

Paper Details

Date Published: 26 April 2019
PDF: 6 pages
Proc. SPIE 11033, High-Power, High-Energy, and High-Intensity Laser Technology IV, 1103306 (26 April 2019); doi: 10.1117/12.2524953
Show Author Affiliations
Jana Preclíková, CRYTUR spol s.r.o. (Czech Republic)
Karel Bartoš, CRYTUR spol s.r.o. (Czech Republic)
Jan Polák, CRYTUR spol s.r.o. (Czech Republic)
Jan Kubát, CRYTUR spol s.r.o. (Czech Republic)
Jan Pilař, HiLASE Ctr., Institute of Physics of the CAS, v.v.i. (Czech Republic)
Petr Navrátil, HiLASE Ctr., Institute of Physics of the CAS, v.v.i. (Czech Republic)
Martin Hanuš, HiLASE Ctr., Institute of Physics of the CAS, v.v.i. (Czech Republic)
Martin Divoký, HiLASE Ctr., Institute of Physics of the CAS, v.v.i. (Czech Republic)
Antonio Lucianetti, HiLASE Ctr., Institute of Physics of the CAS, v.v.i. (Czech Republic)
Martin Fibrich, ELI Beamlines (Czech Republic)
Michal Košelja, ELI Beamlines (Czech Republic)
Jonathan Tyler Green, ELI Beamlines (Czech Republic)
Klaus Ertel, STFC Rutherford Appleton Lab. (United Kingdom)
Jonathan Phillips, STFC Rutherford Appleton Lab. (United Kingdom)
Mariastefania De Vido, STFC Rutherford Appleton Lab. (United Kingdom)
Bedřich Rus, ELI Beamlines (Czech Republic)
Tomáš Mocek, HiLASE Ctr., Institute of Physics of the CAS, v.v.i. (Czech Republic)
Jindřich Houžvička, CRYTUR spol s.r.o. (Czech Republic)


Published in SPIE Proceedings Vol. 11033:
High-Power, High-Energy, and High-Intensity Laser Technology IV
Joachim Hein; Thomas J. Butcher, Editor(s)

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