Optimization of the negative prechirping Franz-Keldys InGaAsP bulk electroabsorption modulator

摘要

We perform structural optimization of negative prechirping Franz-Keldydh InGaAsP bulk electroabsorption (EA) modulator in terms of transmission change and waveguide length. For the optimization, we calculate the chirp parameter (α↓(C)) of EA modulator from the slope of n versus k curve. In the optimization process, for a givenα↓(C) and modulation voltage change we calculate contrast ratio, propagation loss, optimal waveguide length, optimal transmission change varying intrinsic region thickness and bandgap wavelength. Detailed results on optimized structures are presented.