Development of a full spatial coherent X-ray laser at 13.9 nm

作者：Nagashima K^*; Tanaka M; Nishikino M; Kishimoto M; Kado M; Kawachi T; Hasegawa N; Ochi Y; Sukegawa K; Tai R; Kato Y

来源：Applied Physics B: Lasers and Optics , 2004, 78(7-8): 927-932.

DOI：10.1007/s00340-004-1432-7

We have succeeded in developing a laser-pumped X-ray laser with full spatial coherence at 13.9 nm. The X-ray laser beam with a very small divergence of 0.2 mrad was generated from double target experiments, where a seeding light from the first laser medium was amplified in the second laser medium. The observed divergence was close to the diffraction limit value within a factor of two. The seeding light was amplified in the second medium without refraction influence and the gain coefficient was 7.9 cm(-1). From the measurement of visibility, it was found that the spatial coherent length was longer than the beam diameter.

• 出版日期2004-5