Importance of crystal length on the stability of a picosecond supercontinuum generated in undoped YAG

0571958 - FZÚ 2024 RIV US eng J - Journal Article
Roškot, Lukáš - Novák, Ondřej - Csanaková, Bianka - Mužík, Jiří - Smrž, Martin - Jelínek, M. - Mocek, Tomáš
Importance of crystal length on the stability of a picosecond supercontinuum generated in undoped YAG.
Journal of the Optical Society of America. B. Roč. 40, č. 6 (2023), s. 1391-1397. ISSN 0740-3224. E-ISSN 1520-8540
R&D Projects: GA MŠMT EF15_003/0000445; GA MŠMT EF15_006/0000674
EU Projects: European Commission(XE) 739573 - HiLASE CoE
Grant - others:OP VVV - BIATRI(XE) CZ.02.1.01/0.0/0.0/15_003/0000445; OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institutional support: RVO:68378271
Keywords : YAG crystal * Yb thin-disk * regenerative amplifier
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 1.9, year: 2022
Method of publishing: Open access with time embargo

In this paper, we present the stability characteristics of a supercontinuum (SC) generated in a 60 mm, 100 mm, and 130 mm long undoped yttrium aluminum garnet (YAG) crystal pumped by a Yb thin-disk regenerative amplifier. The 1.2 ps pulses with a central wavelength of 1030 nm and repetition rate of 89 kHz are loosely focused (NA = 0.0031) into the crystal in order to prevent laser-induced damage and to increase the energy stability of the generated SC. Out of the tested crystal lengths, the optimal is experimentally determined to be 130 mm. The energy contained in the blueshifted side, which has a 530 nm spectral cutoff, is 71 nJ and exhibits average power stability of 0.4% RMS, which is 2.5× better than the stability of the pump beam.
Permanent Link: https://hdl.handle.net/11104/0342812