Victor Hariton

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Preprint Article Version 1 This version is not peer-reviewed Version 1 : Received: 4 November 2024 / Approved: 4 November 2024 / Online: 5 November 2024 (09:16:51 CET) Vaz, G.; Alves, J.; Hariton, V.; João, C. P.; Marques, J.; Cristino, D.; Gomes, H.; Priebe, C.; Pokorny, P.; Santos, M. S.; Pires, H.; Figueira, G. Multidisciplinary Laser Facility Driven by New Generation High-Repetition Laser. Preprints 2024, 2024110228.

We report a new, to the best of our knowledge, approach to phase matching of nonlinear materials based on the free-space multipass cells. This technique is applicable to noncentrosymmetric nonlinear crystals, including crystals that cannot be birefringent phase-matched or quasi-phase matched by periodic poling. Notably, by using this approach, the crystalline quartz is quasi-phase matched with the demonstrated increase of the second harmonic generation efficiency by a factor of 40.