Nonlinear optics

Generation of the third harmonic in isotropic media under self-interaction conditions

I. A. Kulagin, T. B. Usmanov


Abstract: An analysis is made of frequency addition in isotropic media under self-interaction conditions. An analytic solution is obtained for strong focusing conditions. The optimal position of a constriction of a Gaussian beam is shown to be governed by the ratio of linear and nonlinear contributions to the phase mismatch and by a phase shift resulting from focusing. A study is made of a change in the distribution of the intensity of the output radiation under the influence of Kerr nonlinearities.

UDC: 621.373.826

PACS: 42.65.Ky, 42.65.Hw, 42.65.An, 51.70.+f

Received: 01.12.1987

 English version: Soviet Journal of Quantum Electronics, 1989, 19:3, 376–379

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