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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 15, Iss. 5 — May. 1, 1998
  • pp: 1488–1496

Bright and dark solitary waves in the presence of third-harmonic generation

Rowland A. Sammut, Alexander V. Buryak, and Yuri S. Kivshar  »View Author Affiliations

JOSA B, Vol. 15, Issue 5, pp. 1488-1496 (1998)

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We analyze the effect of phase-matched third-harmonic generation on the existence and stability of (1+1)-dimensional bright and dark spatial solitary waves in optical media with a cubic (or Kerr) nonlinear response. We demonstrate that parametric coupling of the fundamental beam with the third harmonic leads to the existence of two-color solitary waves resembling those in a χ(2) medium and that it can modify drastically the properties of solitary waves due to effective non-Kerr nonlinearities. In particular, we find a power threshold for the existence of two-frequency parametric bright solitons and also reveal the soliton multistability in a Kerr medium that becomes possible owing to a higher-order nonlinear phase shift caused by cascaded third-order processes. We also analyze dark solitary waves and their stabilities. We show that, in a certain parameter domain, parametric χ(3) dark solitons may become unstable owing to the modulational instability of the supporting background or to other instability mechanisms caused by the parametric coupling between the harmonics.

© 1998 Optical Society of America

OCIS Codes
(190.3270) Nonlinear optics : Kerr effect
(190.4160) Nonlinear optics : Multiharmonic generation
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons

Rowland A. Sammut, Alexander V. Buryak, and Yuri S. Kivshar, "Bright and dark solitary waves in the presence of third-harmonic generation," J. Opt. Soc. Am. B 15, 1488-1496 (1998)

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