Abstract
Second-harmonic generation (SHG) by means of radiation modes (the Čerenkov-type radiation scheme) in an anisotropic optical waveguide by off-axis propagation has been studied theoretically. If the second-harmonic wave is a leaky wave of the waveguide, the Čerenkov-type SHG efficiency may be comparable with the efficiency of the guided-mode–guided-mode SHG without critical control of the wave-vector-matching condition. The model presented predicts a strong modification of the radiation field by a change of the interaction length. A numerical simulation of the proposed type of SHG in a graded-index waveguide on the X-cut surface of LiNbO3 is made.
© 1997 Optical Society of America
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