Second-harmonic generation of high-intensity light waves under the influence of cubic nonlinearity

Ziming Sun; Dajie Huang; Wei Fan

doi:10.1117/12.3015478

22 December 2023 Second-harmonic generation of high-intensity light waves under the influence of cubic nonlinearity

Ziming Sun, Dajie Huang, Wei Fan

Proceedings Volume 12974, Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023); 129740O (2023) https://doi.org/10.1117/12.3015478
Event: Fifth International Symposium on High Power Laser Science and Engineering, 2023, Suzhou, China

Abstract

This study examines the implications of cubic nonlinearity on second-harmonic generation (SHG) within high-intensity optical fields, elucidating how cubic nonlinearity inherent to the medium perturbs the ideal phase interrelation among the interacting waves, culminating in diminished energy conversion efficiency and inducing spectrum modulation. A methodology is advanced for identifying the optimal wave vector mismatch that maximizes SHG efficiency while circumventing second-harmonic (SH) pulse modulation. Through simulations of the SHG mechanism, conducted under varying intensities (1-5 TW/cm²) and contrasting durations (10 ns and 50 fs), the research underscores the efficacy of this approach. Notably, an optimal wave vector mismatch scenario facilitated the attainment of an 86% energy conversion efficiency, utilizing a 0.5 mm thick KDP crystal, with the procedure peaking at an intensity of 5 TW/cm² and a pulse duration of 48 fs.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ziming Sun, Dajie Huang, and Wei Fan "Second-harmonic generation of high-intensity light waves under the influence of cubic nonlinearity", Proc. SPIE 12974, Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023), 129740O (22 December 2023); https://doi.org/10.1117/12.3015478

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