Novel fabrication method for frequency tripling mirrors in ultrafast laser applications

Sebastian Balendat; Holger Badorreck; David Zuber; Uwe Morgner; Andreas Wienke; Detlev Ristau; Marco Jupé

doi:10.1117/12.3026881

6 June 2024 Novel fabrication method for frequency tripling mirrors in ultrafast laser applications

Sebastian Balendat, Holger Badorreck, David Zuber, Uwe Morgner, Andreas Wienke, Detlev Ristau, Marco Jupé

Proceedings Volume PC13020, Advances in Optical Thin Films VIII; PC1302012 (2024) https://doi.org/10.1117/12.3026881
Event: SPIE Optical Systems Design, 2024, Strasbourg, France

Conference Poster

Abstract

A new approach for direct third-harmonic generation is the generation inside a stack of dielectric layers. At present, our highest conversion efficiency achieved is 3.5%. This contribution provides an overview of the design process, production, measurement results, and their agreement with simulation results. To create the frequency tripling mirror designs, we use a combination of a Monte Carlo algorithm and a Meep-based algorithm to solve Maxwell's equations. Mandatory for the production of the mirrors is a very precise knowledge of the dispersion data of the materials used. For this purpose, the dispersion data of the coating materials are re-fitted using in-situ transmission data of a BBM after each coating run. In combination with various measures to maintain a stable refractive index of the used Hf_xAl_yO, high coating thickness accuracies are achieved in this way. Finally, experimental measurements and simulation results are compared using the post-fitted dispersion and layer thickness data.

Citation Download Citation

Sebastian Balendat, Holger Badorreck, David Zuber, Uwe Morgner, Andreas Wienke, Detlev Ristau, and Marco Jupé "Novel fabrication method for frequency tripling mirrors in ultrafast laser applications", Proc. SPIE PC13020, Advances in Optical Thin Films VIII, PC1302012 (6 June 2024); https://doi.org/10.1117/12.3026881

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