WDM receiver chip with high responsivity

Abstract

A semiconductor optical amplifier, a grating demultiplexer and a photodiode array were integrated in InGaAsP/InP to form a WDM receiver chip. 10 wavelength channels (TE or TM polarisation) in the 1.54 µm wavelength region with a channel spacing of 2 nm were detected with a crosstalk of less than –20 dB and a responsivity of up to 8 A/W.