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Proceedings Paper

Critical Coupling Strength For Enhanced Four-Wave Mixing By Use Of Moving Interference Gratings In Diffusion Dominated Photorefractive Crystals
Author(s): Cornelia Denz; Joachim Goltz; Theo Tschudi
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Paper Abstract

In nearly degenerated four-wave mixing the application of running gratings in the crystal produces an enhancement of the four-wave mixing efficiency compared to the case of degenerated four-wave mixing with stationary gratings'. In diffusion dominated photorefractive crystals that enhancement is obtained only if the coupling strength rises above a critical value. In our analytical study we examine that critical coupling strength for weak input signals as a function of the pump beam intensity ratio. Moreover, we discuss the dependence of the reflectivity on the (temporal) grating frequency.

Paper Details

Date Published: 8 February 1988
PDF: 5 pages
Proc. SPIE 0963, Optical Computing '88, (8 February 1988); doi: 10.1117/12.947879
Show Author Affiliations
Cornelia Denz, Technische Hochschule Darmstadt (FRG)
Joachim Goltz, Technische Hochschule Darmstadt (FRG)
Theo Tschudi, Technische Hochschule Darmstadt (FRG)

Published in SPIE Proceedings Vol. 0963:
Optical Computing '88
Pierre H. Chavel; Joseph W. Goodman; Gerard Roblin, Editor(s)

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