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X-ray laser beam with diffraction-limited divergence generated with two gain media

2003; Optica Publishing Group; Volume: 28; Issue: 18 Linguagem: Inglês

10.1364/ol.28.001680

1539-4794

Momoko Tanaka, Masaharu Nishikino, Tetsuya Kawachi, Noboru Hasegawa, M. Kado, Maki Kishimoto, Keisuke Nagashima, Y. Kato,

Quantum optics and atomic interactions

We demonstrate an x-ray laser at a wavelength of 13.9 nm with a beam divergence of 0.2 mrad, which is 1.8 times the diffraction limit. The x-ray laser is generated with two gain media; the seed x-ray pulse from the first medium is amplified in the second medium. The effect of refraction on x-ray propagation is reduced by spatially and temporally controlling the injection of the seed x-ray to the second medium.