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Phys. Rev. A 66, 021802 (2002) [4 pages]

Generation of highly coherent submicrojoule soft x rays by high-order harmonics

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Eiji Takahashi *, Yasuo Nabekawa, Tatsuya Otsuka †, Minoru Obara †, and Katsumi Midorikawa ‡
Laser Technology Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan

Rapid Communication Received 22 March 2002; published 26 August 2002

We demonstrated the energy scaling of high-order harmonics using a self-guided beam under the phase-matched condition. By adjusting the argon gas density and pump laser focusing condition, a total output harmonic energy as high as 0.7 μJ was obtained in the spectral region of 34.8 to 25.8 nm (the corresponding order of the 23rd to 31st harmonic), while the 27th-order harmonic (29.6 nm) energy attained was as high as 0.3 μJ.


©2002 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.66.021802
DOI: 10.1103/PhysRevA.66.021802
PACS: 42.65.Ky, 32.80.Rm

* Electronic address: e-taka@postman.riken.go.jp
† Department of Electronics and Electronical Engineering, Keio University.
‡ Electronic address: kmidori@postman.riken.go.jp

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