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10-GHz All-Optical Gate Based on a III–V/SOI Microdisk

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10 Author(s)
Kumar, R. ; INTEC Dept., Ghent Univ., Ghent, Belgium ; Liu Liu ; Roelkens, G. ; Geluk, E.-J.
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We demonstrate an ultrafast and low-power all-optical gate in pump-probe configuration based on free-carrier- induced refractive index modulation in a 5-μm radius InP-InGaAsP microdisk heterogeneously integrated onto a silicon-on-insulator waveguide circuit. High-speed gating is obtained by extracting the carriers from the microdisk active layer by applying a reverse bias. Measured transient responses show that this gate is capable of working up to 20 GHz.

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Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 13 )