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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 1 — Jan. 2, 2012
  • pp: 308–316

Operation of higher harmonic oscillations in free-electron lasers

N. Sei, H. Ogawa, and K. Yamada  »View Author Affiliations

Optics Express, Vol. 20, Issue 1, pp. 308-316 (2012)

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We report for the first time the experimental achievement of a seventh-harmonic free-electron laser (FEL) oscillation. The measured FEL gains and average FEL powers for higher harmonics were identical to those calculated by a one-dimensional FEL theory. The measured linewidths of the higher-harmonic FELs were narrower than that of the fundamental FEL owing to the narrower spectral widths of the spontaneous emissions. By applying the higher-harmonic FEL oscillation to a resonator-type FEL with an advanced accelerator, an x-ray FEL oscillator can be realized at lower electron-beam energy.

© 2011 OSA

OCIS Codes
(140.2600) Lasers and laser optics : Free-electron lasers (FELs)
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 17, 2011
Revised Manuscript: November 27, 2011
Manuscript Accepted: November 27, 2011
Published: December 20, 2011

N. Sei, H. Ogawa, and K. Yamada, "Operation of higher harmonic oscillations in free-electron lasers," Opt. Express 20, 308-316 (2012)

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