High-performance deep-ultraviolet optics for free-electron lasers.
Working with wavelengths shorter than the deep ultraviolet involves the development of dedicated optics for free-electron lasers with devoted coating techniques and characterizations. High-performance deep-ultraviolet optics are specially developed to create low-loss, high-reflectivity dielectric mirrors with long lifetimes in harsh synchrotron radiation environments. In February 2001, lasing at 189.7 nm, the shortest wavelength obtained so far with free-electron-laser oscillators, was obtained at the European Free-electron-laser project at ELETTRA Synchrotron Light Laboratory, Trieste, Italy. In July 2001, 330-mW extracted power at 250 nm was measured with optimized transmission mirrors. Research and development of coatings correlated to lasing performance are reported.
Gatto
Alexandre
A
Fraunhofer Institut für Angewandte Optik und Feinmechanik, Jena, Germany. gatto@iof.fhg.de
Thielsch
Roland
R
Heber
Joerg
J
Kaiser
Norbert
N
Ristau
Detlev
D
Günster
Stephan
S
Kohlhaas
Juergen
J
Marsi
Marino
M
Trovò
Mauro
M
Walker
Richard
R
Garzella
David
D
Couprie
Marie Emmanuelle
ME
Torchio
Philippe
P
Alvisi
Marco
M
Amra
Claude
C