0618597 - FZÚ 2026 RIV US eng J - Journal Article
Jelínek, M. - Frank, M. - Kubeček, V. - Novák, Ondřej - Huynh, Jaroslav - Cimrman, Martin - Chyla, Michal - Smrž, Martin - Mocek, Tomáš
70 MW-level picosecond mid-infrared radiation generation by difference frequency generation in AgGaS₂, BaGa₄Se₇, LiGaSe₂, and LiGaS₂.
IEEE Photonics Journal. Roč. 17, č. 2 (2025), č. článku 3000107. ISSN 1943-0655. E-ISSN 1943-0647
R&D Projects: GA MŠMT(CZ) EH22_008/0004573
Institutional support: RVO:68378271
Keywords : difference frequency generation * mid-infrared radiation * nonlinear optics * picosecond lasers
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.1, year: 2023 ; AIS: 0.444, rok: 2023
Method of publishing: Open access
DOI: https://doi.org/10.1109/JPHOT.2025.3542540

Comparative study of nonlinear crystals for picosecond difference frequency generation in mid-IR is presented. Nonlinear crystals of AgGaS2 , BaGa4 Se7 , LiGaSe2 , and LiGaS2 were studied. In order to investigate the dependence of efficiency on the crystal length, three sets of crystals with lengths of 2, 4, or 8 mm were tested. The developed tunable DFG system was driven by the 1.03 µm, 1.8 ps, Yb:YAG thin-disk laser system operated at the repetition rate of 10 or 100 Hz. As the best result, picosecond mid-IR pulses at a wavelength of ∼7 µm with the energy up to 130 µJ corresponding to the peak power of ∼72 MW were generated using the 8 mm long LiGaS2 crystal. Using the BaGa4Se7 crystal, DFG tunability in the wavelength range from 6 up to 13 µm was achieved.
Permanent Link: https://hdl.handle.net/11104/0365796