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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 21, Iss. 3 — Mar. 1, 2004
  • pp: 591–598

Second-harmonic generation with focused beams under conditions of large group-velocity mismatch

Solomon M. Saltiel, Kaloian Koynov, Ben Agate, and Wilson Sibbett  »View Author Affiliations


JOSA B, Vol. 21, Issue 3, pp. 591-598 (2004)
http://dx.doi.org/10.1364/JOSAB.21.000591


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Abstract

We present a theoretical model that describes the focusing conditions for second-harmonic generation (SHG) of focused femtosecond pulses as a function of group-velocity mismatch (GVM), with direct application to efficient SHG using a “thick” nonlinear crystal. We observe a direct dependence of the optimal focusing ratio, L/b, on the strength of group-velocity mismatch. Our model also describes the temporal duration of the second-harmonic pulses under these conditions as well as the change in optimal phase mismatch. The theoretical results are compared with an experiment for SHG with focused femtosecond pulses in a “thick” crystal of KNbO3.

© 2004 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.0320) Ultrafast optics : Ultrafast optics
(320.7080) Ultrafast optics : Ultrafast devices
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

Citation
Solomon M. Saltiel, Kaloian Koynov, Ben Agate, and Wilson Sibbett, "Second-harmonic generation with focused beams under conditions of large group-velocity mismatch," J. Opt. Soc. Am. B 21, 591-598 (2004)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-21-3-591

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