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Spectral broadening and a prospect for pulse compression of Yb:YAG thin-disk laser pulses by nonlinear SHG in a BBO crystal with time predelay and tilting of the pulse fronts

SYSNO ASEP	0556011
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Spectral broadening and a prospect for pulse compression of Yb:YAG thin-disk laser pulses by nonlinear SHG in a BBO crystal with time predelay and tilting of the pulse fronts
Author(s)	Duda, Martin (FZU-D)_ORCID Novák, Ondřej (FZU-D)_{RID, ORCID} Cimrman, Martin (FZU-D)_ORCID Huynh, Jaroslav (FZU-D)_{RID, ORCID} Smrž, Martin (FZU-D)_{RID, ORCID} Mocek, Tomáš (FZU-D)_{RID, ORCID, SAI}
Number of authors	6
Source Title	Optics Continuum. - : Optica - ISSN 2770-0208 Roč. 1, č. 1 (2022), s. 16-30
Number of pages	16 s.
Language	eng - English
Country	US - United States
Keywords	pulse compression ; nonlinear optical crystal ; Yb:YAG laser ; BBO crystals
Subject RIV	BH - Optics, Masers, Lasers
OECD category	Optics (including laser optics and quantum optics)
R&D Projects	EF15_006/0000674 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Open access
Institutional support	FZU-D - RVO:68378271
UT WOS	000835315500003
EID SCOPUS	85125951362
DOI	10.1364/OPTCON.437879
Annotation	Pulse compression by second harmonic generation in a type II nonlinear optical crystal controlled by a time predelay of the faster input pulse is not simple to achieve high-average power Yb:YAG lasers with wavelength of 1030 nm. The reason is that the borate nonlinear crystals with their excellent thermal properties do not have the optimal ratio of group velocities of the interacting pulses to achieve efficient pulse compression. We have changed the effective group velocities by tilting the pulse fronts at a diffraction grating and imaging the tilted 1.7 ps pulses into the 6 and 8.5 mm thick BBO crystals. As a result, we have measured significant spectral broadening to 4.5 nm, supporting pulses as short as 100 fs, with an energy conversion efficiency in excess of 20 %. The measured data correspond well with numerical simulations. This research opens a way to extend the range of possible applications of Yb:YAG high-average-power thin-disk lasers into the fs regime.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2023
Electronic address	http://hdl.handle.net/11104/0330377

Number of the records: 1