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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 1 — Jan. 1, 2012
  • pp: 97–99

Generation of soft x-ray and water window harmonics using a few-cycle, phase-locked, optical parametric chirped-pulse amplifier

Nobuhisa Ishii, Shunsuke Adachi, Yutaka Nomura, Atsushi Kosuge, Yohei Kobayashi, Teruto Kanai, Jiro Itatani, and Shuntaro Watanabe  »View Author Affiliations


Optics Letters, Vol. 37, Issue 1, pp. 97-99 (2012)
http://dx.doi.org/10.1364/OL.37.000097


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Abstract

Multimillijoule, few-cycle, carrier-envelope-phase (CEP)-locked, near-IR pulses at 750 nm from an optical parametric chirped-pulse amplifier are applied to the generation of CEP-dependent, soft x-ray high harmonics around the boron K-edge at 188 eV. The dependence on the CEP manifests the phase coherence of high harmonics preserved in the highest-photon energy ever reported. Multimillijoule optical pulses also allow the extension of the cutoff energy up to 325 eV, exceeding the carbon K-edge of the water window. However, in this spectral range, the CEP dependence of harmonic spectra is not observed, suggesting the degradation of temporal coherence due to the heavy ionization of helium atoms.

© 2012 Optical Society of America

OCIS Codes
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(020.2649) Atomic and molecular physics : Strong field laser physics

ToC Category:
Ultrafast Optics

History
Original Manuscript: October 4, 2011
Revised Manuscript: November 14, 2011
Manuscript Accepted: November 15, 2011
Published: December 26, 2011

Citation
Nobuhisa Ishii, Shunsuke Adachi, Yutaka Nomura, Atsushi Kosuge, Yohei Kobayashi, Teruto Kanai, Jiro Itatani, and Shuntaro Watanabe, "Generation of soft x-ray and water window harmonics using a few-cycle, phase-locked, optical parametric chirped-pulse amplifier," Opt. Lett. 37, 97-99 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-1-97

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