Role of two-photon absorption in ultrafast semiconductor optical switching devices
- 2 April 1990
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 56 (14) , 1305-1307
- https://doi.org/10.1063/1.102502
Abstract
We report measurements of the two-photon absorption coefficient of GaAs optical waveguide structures at 1.06 μm. We show that for pulse lengths longer than ∼1 ps, light-induced index changes sufficient to induce all-optical switching will be predominantly due to carriers generated by two-photon absorption. These results allow us to predict limitations for ultrafast all-optical GaAs devices.Keywords
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