19 December 2003 Development of a full spatial coherent x-ray laser at 13.9 nm
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Abstract
We have succeeded in developing a laser-pumped x-ray laser with full spatial coherence at 13.9 nm. A highly directed x-ray laser beam with the divergence of 0.2 mrad was generated from the double target experiment, where a seeding light from the first laser medium was amplified in the second medium. The observed divergence is close to the diffraction limited value within a factor of two. The seeding light was amplified in the second medium without refraction influence and the gain coefficient was about 8 cm-1. The gain region of the second medium was far away from the target surface compared with that of the first medium and located in the considerably low density region. From the measurement of visibility, it was found that the spatial coherent length is longer than the beam diameter.
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Keisuke Nagashima, Keisuke Nagashima, Momoko Tanaka, Momoko Tanaka, Masaharu Nishikino, Masaharu Nishikino, Maki Kishimoto, Maki Kishimoto, Masataka Kado, Masataka Kado, Tetsuya Kawachi, Tetsuya Kawachi, Noboru Hasegawa, Noboru Hasegawa, Yoshihiro Ochi, Yoshihiro Ochi, Kouta Sukegawa, Kouta Sukegawa, Renzhong Tai, Renzhong Tai, Yoshiaki Kato, Yoshiaki Kato, } "Development of a full spatial coherent x-ray laser at 13.9 nm", Proc. SPIE 5197, Soft X-Ray Lasers and Applications V, (19 December 2003); doi: 10.1117/12.503910; https://doi.org/10.1117/12.503910
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