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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 22 — Nov. 15, 2012
  • pp: 4618–4620

Optimization and phase matching of fiber-laser-driven high-order harmonic generation at high repetition rate

Amélie Cabasse, Guillaume Machinet, Antoine Dubrouil, Eric Cormier, and Eric Constant  »View Author Affiliations


Optics Letters, Vol. 37, Issue 22, pp. 4618-4620 (2012)
http://dx.doi.org/10.1364/OL.37.004618


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Abstract

High-repetition-rate sources are very attractive for high-order harmonic generation (HHG). However, due to their pulse characteristics (low energy, long duration), those systems require a tight focusing geometry to achieve the necessary intensity to generate harmonics. In this Letter, we investigate theoretically and experimentally the optimization of HHG in this geometry, to maximize the extreme UV (XUV) photon flux and improve the conversion efficiency. We analyze the influence of atomic gas media (Ar, Kr, or Xe), gas pressure, and interaction geometries (a gas jet and a finite and a semi-infinite gas cell). Numerical simulations allow us to define optimal conditions for HHG in this tight focusing regime and to observe the signature of on-axis phase matching. These conditions are implemented experimentally using a high-repetition-rate Yb-doped fiber laser system. We achieve optimization of emission with a recorded XUV photon flux of 4.5×1012photons/s generated in Xe at 100 kHz repetition rate.

© 2012 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: August 3, 2012
Revised Manuscript: September 25, 2012
Manuscript Accepted: October 4, 2012
Published: November 6, 2012

Citation
Amélie Cabasse, Guillaume Machinet, Antoine Dubrouil, Eric Cormier, and Eric Constant, "Optimization and phase matching of fiber-laser-driven high-order harmonic generation at high repetition rate," Opt. Lett. 37, 4618-4620 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-22-4618


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