We show that the evolution of the average intensity of cw beams in a quasi-phase-matched quadratic (or chi((2))) medium is strongly influenced by induced Kerr effects, such as self- and cross-phase modulation. We prove the existence of rapidly oscillating solitary waves (a spatial analog of the guided-center soliton) supported by the quadratic and induced cubic nonlinearities.
Bibliographical noteCopyright (1997) by the American Physical Society.
- GUIDING-CENTER SOLITON
- 2ND-HARMONIC GENERATION