New electroabsorption modulator with triode structure for optical gating

An electroabsorption (EA) modulator is an attractive device for optical gating. Using EA modulators operated by sinusoidal modulations gives us a simple method for optical demultiplexing. We propose a triode type EA (Tr-EA) modulator as the optical gate switch to achieve full gating operation with a O to 100% time slot window corresponding to the demultiplexed bit-rate. An InGaAsP bulk absorber and a high-mesa ridge waveguide buried with polyimide is used.