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 - Článek v odborném periodiku
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
Grant CEP: GA MŠMT EF15_006/0000674; GA MŠMT LO1602; GA MŠMT LM2015086
GRANT EU: European Commission(XE) 739573 - HiLASE CoE
Grant ostatní: OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institucionální podpora: RVO:68378271
Klíčová slova: laser filamentation * mid-infrared laser * nonlinear optics * ultrafast optics
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 5.943, rok: 2021
Způsob publikování: 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.

Trvalý link: http://hdl.handle.net/11104/0319419