Coherence of the Ne-like Ge soft x-ray laser

Y. Kato; M. Yamanaka; H. Daido; H. Shiraga; K. Murai; G. Yuan; H. Azuma; E. Miura; S. Nakai; C. L. S. Lewis; C. L. S. Lewis; D. M. O’Neill; D. M. O’Neill; D. Neely; D. Neely

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 1992),
paper CWB3

Coherence of the Ne-like Ge soft x-ray laser

Y. Kato, M. Yamanaka, H. Daido, H. Shiraga, K. Murai, G. Yuan, H. Azuma, E. Miura, S. Nakai, C. L. S. Lewis, D. M. O’Neill, and D. Neely

Conference on Lasers and Electro-Optics 1992

Anaheim, California United States
10–15 May 1992
ISBN: 1-55752-537-5

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Laser-Target Interaction Physics (CWB)

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Y. Kato, M. Yamanaka, H. Daido, H. Shiraga, K. Murai, G. Yuan, H. Azuma, E. Miura, S. Nakai, C. L. S. Lewis, D. M. O’Neill, and D. Neely, "Coherence of the Ne-like Ge soft x-ray laser," in Conference on Lasers and Electro-Optics, A. Johnson, R. Lind, T. Baer, and A. Smirl, eds., Vol. 12 of OSA Technical Digest (Optica Publishing Group, 1992), paper CWB3.

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Abstract

Soft x-ray laser radiation is generated as amplified spontaneous emission (ASE) in a long and thin cylindrical plasma. Spatial coherence develops through propagation of spontaneous emission in the amplifier. A highly spatially coherent x-ray laser beam will be generated in a plasma column of small Fresnel number. Temporal coherence is related to the spectral width of the lasing line, which should be less than the nonlasing line width because of gain narrowing. Still, the output of the ASE laser is temporally chaotic. A laser cavity together with a mode selector is required to generate a temporally coherent x-ray laser.

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