InP/InGaAsP photonic integrated broadly tunable receivers based on grating-assisted codirectional coupler optical filter

In this paper, we report a widely-tunable receiver which integrates a semiconductor optical amplifier (SOA), a tunable two-stage grating assisted codirectional coupler (GACC) optical filter, and a waveguide photodetector. The integrated device can be continuously tuned for a 45 nm wavelength range.