Open AccessExtreme ultraviolet free electron laser seeded with high-order harmonic of Ti:sapphire laser
Author(s) -
Tadashi Togashi,
Eiji J. Takahashi,
Katsumi Midorikawa,
M. Aoyama,
Koichi Yamakawa,
Takahiro Sato,
Atsushi Iwasaki,
Shigeki Owada,
Tomoya Okino,
Kaoru Yamanouchi,
Fumihiko Kannari,
Akira Yagishita,
H. Nakano,
M.E. Couprie,
Kenji Fukami,
Takaki Hatsui,
Toru Hara,
Takashi Kameshima,
Hideo Kitamura,
N. Kumagai,
Shigeo Matsubara,
Mitsuru Nagasono,
Haruhiko Ohashi,
Takashi Ohshima,
Yuji Otake,
T. Shintake,
Kenji Tamasaku,
Hitoshi Tanaka,
Takashi Tanaka,
Kazuaki Togawa,
H. Tomizawa,
Takahiro Watanabe,
Makina Yabashi,
Tetsuya Ishikawa
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.000317
Subject(s) - laser , optics , radiation , amplified spontaneous emission , sapphire , high harmonic generation , free electron laser , extreme ultraviolet , wavelength , materials science , seeding , physics , ti:sapphire laser , amplifier , active laser medium , optoelectronics , laser power scaling , cmos , thermodynamics
The 13th harmonic of a Ti:sapphire (Ti:S) laser in the plateau region was injected as a seeding source to a 250-MeV free-electron-laser (FEL) amplifier. When the amplification conditions were fulfilled, strong enhancement of the radiation intensity by a factor of 650 was observed. The random and uncontrollable spikes, which appeared in the spectra of the Self-Amplified Spontaneous Emission (SASE) based FEL radiation without the seeding source, were found to be suppressed drastically to form to a narrow-band, single peak profile at 61.2 nm. The properties of the seeded FEL radiation were well reproduced by numerical simulations. We discuss the future precept of the seeded FEL scheme to the shorter wavelength region.