Multi-octave-spanning supercontinuum generation through high-energy laser filaments in YAG and ZnSe pumped by a 2.4 mu m femtosecond Cr:ZnSe laser

0541922 - FZÚ 2022 RIV GB eng J - Journal Article
Nam s, S.-H. - Nagar, G.C. - Dempsey, D. - Novák, Ondřej - Shim, B. - Hong, K.-H.
Multi-octave-spanning supercontinuum generation through high-energy laser filaments in YAG and ZnSe pumped by a 2.4 mu m femtosecond Cr:ZnSe laser.
High Power Laser Science and Engineering. Roč. 9, May (2021), č. článku e12. ISSN 2095-4719. E-ISSN 2052-3289
R&D Projects: GA MŠMT EF15_006/0000674; GA MŠMT LO1602; GA MŠMT LM2015086
EU Projects: European Commission(XE) 739573 - HiLASE CoE
Grant - others:OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institutional support: RVO:68378271
Keywords : laser filamentation * mid-infrared laser * nonlinear optics * ultrafast optics
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 5.943, year: 2021
Method of publishing: Open access

We present experimental and numerical investigations of high-energy mid-infrared filamentation with multi-octave spanning supercontinuum generation (SCG), pumped by a 2.4 µm, 250 fs Cr:ZnSe chirped-pulse laser amplifier. The SCG is demonstrated in both anomalous and normal dispersion regimes with YAG and polycrystalline ZnSe, respectively. The formation of stable and robust single filaments along with the visible-to-mid-infrared SCG is obtained with a pump energy of up to 100 µJ in a 6-mm-long YAG medium. To the best of the authors’ knowledge, this is the highest-energy multi-octave-spanning SCG from a laser filament in a solid. On the other hand, the SCG and even harmonic generation based on random quasi-phase matching (RQPM) are simultaneously observed from the single filaments in a 6-mm-long polycrystalline ZnSe medium with a pump energy of up to 15 µJ.

Permanent Link: http://hdl.handle.net/11104/0319419