用钛宝石激光器的高次谐波作为种子源的极紫外自由电子激光器。
Extreme ultraviolet free electron laser seeded with high-order harmonic of Ti:sapphire laser.
作者信息
Togashi Tadashi, Takahashi Eiji J, Midorikawa Katsumi, Aoyama Makoto, Yamakawa Koichi, Sato Takahiro, Iwasaki Atsushi, Owada Shigeki, Okino Tomoya, Yamanouchi Kaoru, Kannari Fumihiko, Yagishita Akira, Nakano Hidetoshi, Couprie Marie E, Fukami Kenji, Hatsui Takaki, Hara Toru, Kameshima Takashi, Kitamura Hideo, Kumagai Noritaka, Matsubara Shinichi, Nagasono Mitsuru, Ohashi Haruhiko, Ohshima Takashi, Otake Yuji, Shintake Tsumoru, Tamasaku Kenji, Tanaka Hitoshi, Tanaka Takashi, Togawa Kazuaki, Tomizawa Hiromitsu, Watanabe Takahiro, Yabashi Makina, Ishikawa Tetsuya
机构信息
RIKEN, XFEL Project Head Office, Sayo, Hyogo, Japan.
出版信息
Opt Express. 2011 Jan 3;19(1):317-24. doi: 10.1364/OE.19.000317.
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.
钛宝石（Ti:S）激光器在平台区的第13谐波作为种子源注入到一台250兆电子伏特的自由电子激光（FEL）放大器中。当满足放大条件时，观察到辐射强度强烈增强了650倍。在没有种子源的基于自放大自发辐射（SASE）的FEL辐射光谱中出现的随机且不可控的尖峰，被发现被大幅抑制，从而在61.2纳米处形成窄带单峰轮廓。通过数值模拟很好地再现了种子注入FEL辐射的特性。我们讨论了种子注入FEL方案在更短波长区域的未来设想。
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