Enhancement in electroabsorption waveguide modulator slope efficiency at high optical power
- 1 July 1998
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 10 (7), 961-963
- https://doi.org/10.1109/68.681284
Abstract
An increase in transfer curve slope efficiency for a Franz-Keldysh effect InGaAsP-InP electroabsorption waveguide modulator is observed as the incident optical power is increased from 5.8 to 17 dBm. However, high-frequency RF measurements agree with the gain predicted from the low-power transfer curve at all optical powers. We attribute the increase in dc slope efficiency to a temperature-induced bandgap shrinkage of the electroabsorption material.Keywords
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