Free space quasi-phase matching in multipass cells

Nazar Kovalenko; Victor Hariton; Kilian Fritsch; Oleg Pronin

doi:10.1117/12.2668593

17 March 2023 Free space quasi-phase matching in multipass cells

Nazar Kovalenko, Victor Hariton, Kilian Fritsch, Oleg Pronin

Proceedings Volume PC12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII; PC124050T (2023) https://doi.org/10.1117/12.2668593
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

In this work, we propose a new concept of phase-matching based on multiple passes of interacting beams through the same nonlinear crystal placed inside a multi-pass cell. We show that materials such as crystalline quartz, can be quasi-phase-matched in such a multipass arrangement. Moreover, we have demonstrated enhanced conversion efficiency approaching 40% with very low, 10 MW/cm2 intensity in the 2-mm thick KTP crystal inside a multipass arrangement. Thus we present the first proof-of-concept experimental demonstration of χ(2) multipass nonlinear optics where free space birefringent phase-matching and quasi-phase matching can be realized with nearly all types of nonlinear materials.

Conference Presentation

Citation Download Citation

Nazar Kovalenko, Victor Hariton, Kilian Fritsch, and Oleg Pronin "Free space quasi-phase matching in multipass cells", Proc. SPIE PC12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII, PC124050T (17 March 2023); https://doi.org/10.1117/12.2668593

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