UV dielectric multilayer mirrors for free-electron lasers

Eric Renault; Daniele Nutarelli; David Garzella; Marie-Emmanuelle Couprie; Michel Billardon

doi:10.1117/12.360100

7 September 1999 UV dielectric multilayer mirrors for free-electron lasers

Eric Renault, Daniele Nutarelli, David Garzella, Marie-Emmanuelle Couprie, Michel Billardon

Proceedings Volume 3738, Advances in Optical Interference Coatings; (1999) https://doi.org/10.1117/12.360100
Event: Optical Systems Design and Production, 1999, Berlin, Germany

Abstract

Storage Ring Free Electron Layers (FELs) are brand new laser sources where a relativistic electron beam passing through an undulator emits synchrotron radiation at a wavelength (lambda) which is tunable according to the electron beam energy and the magnetic field intensity. An overview of the SRFELs presently operating in the UV range is presented. The easy tunable FEL operation in the whole UV range is mainly limited by the mirrors losses, which should be maintained low even in the very hostile environment generated by the broadband high power spectrum of the undulator, extending to x-rays, and which action lead to the mirrors degradation. Dedicated mirror measurements have been then developed in LURE, in the visible and in the UV range, for checking the mirrors performances before insertion in the optical cavity and after degradation. In order to insure a wide tunability range and large output power of the FEL, low total losses are crucial for FEL oscillation at shorter wavelength. New FEL sources, for instance at the ELETTRA synchrotron source, could then provide a widely tunable and powerful laser light down to 200 nm.

Citation Download Citation

Eric Renault, Daniele Nutarelli, David Garzella, Marie-Emmanuelle Couprie, and Michel Billardon "UV dielectric multilayer mirrors for free-electron lasers", Proc. SPIE 3738, Advances in Optical Interference Coatings, (7 September 1999); https://doi.org/10.1117/12.360100

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