High-Order Harmonic Generation and Quasiphase Matching in Xenon Using Self-Guided Femtosecond Pulses

H. R. Lange; A. Chiron; J.-F. Ripoche; A. Mysyrowicz; P. Breger; P. Agostini

doi:10.1103/PhysRevLett.81.1611

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High-Order Harmonic Generation and Quasiphase Matching in Xenon Using Self-Guided Femtosecond Pulses

H. R. Lange¹, A. Chiron², J.-F. Ripoche¹, A. Mysyrowicz¹, P. Breger³, and P. Agostini³

¹Laboratoire d'Optique Appliquée, CNRS UMR 7639, École Nationale Supérieure de Techniques Avancées-École Polytechnique, F-91761 Palaiseau, France
²Dipartimento di Fisica, Universita di Pisa, Piazza Torricelli 2, I-56100 Pisa, Italy
³Service des Photons, Atomes et Molecules, Centre d'Etudes de Saclay, F-91191 Gif sur Yvette, France

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Phys. Rev. Lett. 81, 1611 – Published 24 August, 1998

DOI: https://doi.org/10.1103/PhysRevLett.81.1611

Abstract

Ultrashort self-guided laser pulses are employed to generate high-order harmonics in noble gases. Interference fringes between fundamental and harmonic waves over several cm reveal a long range longitudinal coherence of the generated harmonics. Quasiphase matching is demonstrated for the third harmonic wave.

References (9)

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Ch. Spielmann et al., Science 278, 661 (1997); Z. Chang et al., Phys. Rev. Lett. 79, 2967 (1997).
$L_{d}$ has become known in the literature as the coherence length, a misnomer since it actually expresses the distance over which the relative phase between the fundamental and harmonic waves is shifted by $π$ , not the distance $L_{coh}$ over which coherence of either the fundamental or harmonic is lost.
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[c1] A. l'Huillier, L.-A. Lompré, G. Mainfray, and C. Manus, in Atoms in Intense Laser Fields, Mihai Gavrila (Academic, New York,1992), p. 187.

[c2] Ch. Spielmann et al., Science 278, 661 (1997); Z. Chang et al., Phys. Rev. Lett. 79, 2967 (1997).

[c3] $L_{d}$ has become known in the literature as the coherence length, a misnomer since it actually expresses the distance over which the relative phase between the fundamental and harmonic waves is shifted by $π$ , not the distance $L_{coh}$ over which coherence of either the fundamental or harmonic is lost.

[c4] Ph. Balcou, P. Salières, A. L'Huillier, and M. Lewenstein, Phys. Rev. A 55, 3204 (1997).

[c5] A. Braun et al., Opt. Lett. 20, 73 (1995); E. T. J. Nibbering et al., 21, 62 (1996); A. Brodeur et al., 22, 304 (1997).

[c6] H. R. Lange et al., Opt. Lett. 23, 120 (1998).

[c7] A. Chiron et al., “Numerical Simulations of the Nonlinear Propagation of fs Optical Pulses in Gases” (to be published).

[c8] P. G. Kazansky et al., Opt. Lett. 20, 843 (1995); Y. Y. Zhu et al., Appl. Phys. Lett. 70, 1793 (1997).

[c9] D. I. Metchkov, V. M. Mitev, L. I. Pavlov, and K. V. Stamenov, Opt. Commun. 21, 391 (1977); C. G. Durfee III et al., postdeadline paper to the IQEC Conference, San Francisco, 1998.

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High-Order Harmonic Generation and Quasiphase Matching in Xenon Using Self-Guided Femtosecond Pulses

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