Two-wave mixing in thin nonlinear local-response media: a simple theoretical model
JOSA B, Vol. 9, Issue 12, pp. 2196-2205 (1992)
http://dx.doi.org/10.1364/JOSAB.9.002196
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Abstract
A systematic study of degenerate two-wave mixing in the stationary regime in thin nonlinear local-response media is presented. The model is based on the coherent interaction of four waves, the two incident beams, and the two main diffracted waves. Analytical results are obtained in all cases investigated under the assumption of weak-beam amplification. It is demonstrated that the energy transfer arises only from the forward degenerate four-wave mixing terms. In particular, the theoretical results show two new features: (1) the gain factor of the interaction is substantially reduced because of the phase change associated with the two-wave mixing terms and (2) a phase mismatch can compensate for this phase change, leading to an appreciable gain enhancement. Moreover, the general case is solved numerically. Particular attention is given to the influence of separate two-wave and forward degenerate four-wave mixing terms. Self-diffraction effects and the gain dependence versus the ratio of the pump-beam intensity to the signal-beam intensity are investigated.
© 1992 Optical Society of America
Citation
F. Sanchez, "Two-wave mixing in thin nonlinear local-response media: a simple theoretical model," J. Opt. Soc. Am. B 9, 2196-2205 (1992)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-9-12-2196
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