Comparative study of high repetition rate supercontinuum generation in undoped sapphire, YAG, and KGW crystals

Vaida Marčiulionytė; Kawthar Reggui; Gintaras Tamošauskas; Audrius Dubietis

doi:10.1117/12.2665349

5 June 2023 Comparative study of high repetition rate supercontinuum generation in undoped sapphire, YAG, and KGW crystals

Vaida Marčiulionytė, Kawthar Reggui, Gintaras Tamošauskas, Audrius Dubietis

Author Affiliations +

Proceedings Volume 12569, Nonlinear Optics and Applications XIII; 125690E (2023) https://doi.org/10.1117/12.2665349
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Conference Poster

Abstract

We present a comparative study of supercontinuum generation in sapphire, yttrium aluminium garnet (YAG) and potassium gadolinium tungstate (KGW) crystals with 210 fs, 1030 nm pulses from an amplified Yb:KGW laser. We demonstrate that KGW crystal has the lowest supercontinuum generation threshold, negligible bulk heating due to low nonlinear losses and exhibits long-term damage-free operation at 2 MHz repetition rate without any need for translation of the crystal. Our results prove that KGW crystal is an excellent nonlinear material for high average power infrared supercontinuum generation and for seeding high repetition rate fundamental harmonics-pumped ultrafast optical parametric amplifiers.

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Vaida Marčiulionytė, Kawthar Reggui, Gintaras Tamošauskas, and Audrius Dubietis "Comparative study of high repetition rate supercontinuum generation in undoped sapphire, YAG, and KGW crystals", Proc. SPIE 12569, Nonlinear Optics and Applications XIII, 125690E (5 June 2023); https://doi.org/10.1117/12.2665349

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