Broadband phase-shifting mirrors for ultrafast lasers.
Appl Opt
; 59(5): A123-A127, 2020 Feb 10.
Article
em En
| MEDLINE
| ID: mdl-32225363
ABSTRACT
Metal-dielectric phase-shifting multilayer optical elements have been developed, providing broadband, virtually dispersion-free polarization manipulation down to the few-cycle level. These optical elements are Ag/Al2O3 mirrors that operate in the spectral range from 500 to 100 nm, exhibiting reflectance higher than 95%, and a differential phase shift between the s- and p-polarization of about 90° distributed over four bounces. The mirrors have been designed, produced, and reliably characterized based on spectral photometric and ellipsometric data using a non-parametric approach as well as a multi-oscillator model. The optical elements were implemented into a few-cycle laser system, where they transformed linearly polarized few-cycle light pulses to circular polarization.
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MEDLINE
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En
Ano de publicação:
2020
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Article