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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 29, Iss. 1 — Jan. 1, 2004
  • pp: 86–88

Enhancement of high-order harmonic generation at tuned wavelengths through adaptive control

David H. Reitze, Sophie Kazamias, Frederick Weihe, Genevive Mullot, Denis Douillet, Frederika Aug, Olivier Albert, Vidya Ramanathan, Jean Paul Chambaret, Danile Hulin, and Philippe Balcou  »View Author Affiliations


Optics Letters, Vol. 29, Issue 1, pp. 86-88 (2004)
http://dx.doi.org/10.1364/OL.29.000086


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Abstract

An adaptive learning loop enhances the efficiency and tuning of high-order harmonic generation. In comparison with simple chirp tuning, we observe a broader tuning range and a twofold to threefold enhancement in integrated photon flux in the cutoff region. The driving pulse temporal phase varies significantly for different tunings and is more complicated than a simple chirp. We compare our experimental results with a one-dimensional, time-dependent model that incorporates the intrinsic atomic response, the experimental pulse temporal phase, ionization effects, and transverse coherence of the spatial mode of the laser. The model agrees with our experimental results and indicates that a specific quantum path coupled with ionization effects determines the optimized harmonic spectrum.

© 2004 Optical Society of America

OCIS Codes
(190.4160) Nonlinear optics : Multiharmonic generation
(270.6620) Quantum optics : Strong-field processes
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

Citation
David H. Reitze, Sophie Kazamias, Frederick Weihe, Genevive Mullot, Denis Douillet, Frederika Aug, Olivier Albert, Vidya Ramanathan, Jean Paul Chambaret, Danile Hulin, and Philippe Balcou, "Enhancement of high-order harmonic generation at tuned wavelengths through adaptive control," Opt. Lett. 29, 86-88 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-1-86


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