Effects of three-photon absorption on nonlinear directional coupling
- 15 May 1992
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 17 (10), 710-712
- https://doi.org/10.1364/ol.17.000710
Abstract
The effects of three-photon absorption on nonlinear directional coupling in semiconductors below half the gap are studied for both cw and sech2 pulse signals. The figure of merit associated with three-photon absorption includes not only material properties but also device design parameters. Numerical results show that at high powers, three-photon absorption significantly degrades nonlinear coupling, reduces throughput, and distorts output pulses. Good agreement is found between the theoretical model and experimental data.Keywords
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