High-speed dual-wavelength demultiplexing and detection in a monolithic superlattice p-i-n waveguide detector array

Abstract

We demonstrate high‐speed (1 Gbit/s) dual‐wavelength demultiplexing and detection in a monolithic linear array of superlattice p‐i‐n photodetectors in a waveguide configuration. A crosstalk attenuation of 28 dB was achieved between two digital transmission channels with an interchannel wavelength spacing of 30 nm. The device performance is a result of an enhanced electroabsorption due to the quantum‐confined Stark effect in the superlattice p‐i‐n diodes.