Hybrid mirrors enabling storage-ring free-electron laser lasing below 170 nm

Leif Kochanneck; Henrik Ehlers; Stepan F. Mikhailov; Maurice E. Pentico; Ying K. Wu; Victor G. Popov; Patrick Wallace; Jun Yan; Lars O. Jensen

doi:10.1117/12.2600571

12 October 2021 Hybrid mirrors enabling storage-ring free-electron laser lasing below 170 nm

Leif Kochanneck, Henrik Ehlers, Stepan F. Mikhailov, Maurice E. Pentico, Ying K. Wu, Victor G. Popov, Patrick Wallace, Jun Yan, Lars O. Jensen

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Proceedings Volume 11910, Laser-Induced Damage in Optical Materials 2021; 119100W (2021) https://doi.org/10.1117/12.2600571
Event: SPIE Laser Damage, 2021, Online Only

Abstract

Dielectric cavity mirrors for storage-ring free-electron lasers (FELs) in the VUV range have to overcome several challenges including resistance to synchrotron radiation and long-term stability in a contaminated vacuum. While oxide materials are not suitable below 190 nm, pure fluoride materials are not stable in this challenging environment. It has not been possible until now to generate lasing below 176 nm in a storage ring FEL. Duke University/TUNL and Laser Zentrum Hannover have successfully developed new strategies and produced mirrors with a high reflectivity of 95 %, which enabled FEL lasing between 168,6 and 176,7 nm.

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Leif Kochanneck, Henrik Ehlers, Stepan F. Mikhailov, Maurice E. Pentico, Ying K. Wu, Victor G. Popov, Patrick Wallace, Jun Yan, and Lars O. Jensen "Hybrid mirrors enabling storage-ring free-electron laser lasing below 170 nm", Proc. SPIE 11910, Laser-Induced Damage in Optical Materials 2021, 119100W (12 October 2021); https://doi.org/10.1117/12.2600571

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