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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 4 — Feb. 15, 2012
  • pp: 503–505

Vacuum ultraviolet frequency combs generated by a femtosecond enhancement cavity in the visible

Birgitta Bernhardt, Akira Ozawa, Andreas Vernaleken, Ioachim Pupeza, Jan Kaster, Yohei Kobayashi, Ronald Holzwarth, Ernst Fill, Ferenc Krausz, Theodor W. Hänsch, and Thomas Udem  »View Author Affiliations


Optics Letters, Vol. 37, Issue 4, pp. 503-505 (2012)
http://dx.doi.org/10.1364/OL.37.000503


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Abstract

We present the first (to our best knowledge) femtosecond enhancement cavity in the visible wavelength range for ultraviolet frequency comb generation. The cavity is seeded at 518 nm by a frequency-doubled Yb fiber laser and operates at a peak intensity of 1.2×1013W/cm2. High harmonics of up to the ninth order (57nm) are generated in an intracavity xenon gas jet. Intracavity high harmonic powers of several milliwatts for the third harmonic order and microwatts for the fifth harmonic order prove the potential of the “green cavity” as an efficient ultraviolet frequency comb source for future spectroscopic experiments. A limiting degradation effect of the cavity mirrors is avoided by operating at a constant oxygen background pressure.

© 2012 Optical Society of America

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers
(190.4160) Nonlinear optics : Multiharmonic generation

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: November 16, 2011
Manuscript Accepted: December 7, 2011
Published: February 6, 2012

Citation
Birgitta Bernhardt, Akira Ozawa, Andreas Vernaleken, Ioachim Pupeza, Jan Kaster, Yohei Kobayashi, Ronald Holzwarth, Ernst Fill, Ferenc Krausz, Theodor W. Hänsch, and Thomas Udem, "Vacuum ultraviolet frequency combs generated by a femtosecond enhancement cavity in the visible," Opt. Lett. 37, 503-505 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-4-503

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