Extreme ultraviolet free electron laser seeded with high-order harmonic of Ti: Sapphire laser

Tadashi Togashi, Eiji J. Takahashi, Katsumi Midorikawa, Makoto Aoyama, Koichi Yamakawa, Takahiro Sato, Atsushi Iwasaki, Shigeki Owada, Tomoya Okino, Kaoru Yamanouchi, Fumihiko Kannari, Akira Yagishita, Hidetoshi Nakano, Marie E. Couprie, Kenji Fukami, Takaki Hatsui, Toru Hara, Takashi Kameshima, Hideo Kitamura, Noritaka KumagaiShinichi Matsubara, Mitsuru Nagasono, Haruhiko Ohashi, Takashi Ohshima, Yuji Otake, Tsumoru Shintake, Kenji Tamasaku, Hitoshi Tanaka, Takashi Tanaka, Kazuaki Togawa, Hiromitsu Tomizawa, Takahiro Watanabe, Makina Yabashi, Tetsuya Ishikawa

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Abstract

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.

Original languageEnglish
Pages (from-to)317-324
Number of pages8
JournalOptics Express
Volume19
Issue number1
DOIs
Publication statusPublished - 2011 Jan 3

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Togashi, T., Takahashi, E. J., Midorikawa, K., Aoyama, M., Yamakawa, K., Sato, T., Iwasaki, A., Owada, S., Okino, T., Yamanouchi, K., Kannari, F., Yagishita, A., Nakano, H., Couprie, M. E., Fukami, K., Hatsui, T., Hara, T., Kameshima, T., Kitamura, H., ... Ishikawa, T. (2011). Extreme ultraviolet free electron laser seeded with high-order harmonic of Ti: Sapphire laser. Optics Express, 19(1), 317-324. https://doi.org/10.1364/OE.19.000317