Integrated 1 GHz 4-channel InP phasar based WDM-receiver with Si bipolar frontend array

An integrated 4-channel WDM-receiver frontend with 1 GHz channel bandwidth is described. The receiver consists of an integrated wavelength demultiplexer with photodiodes in InP technology connected through bond wires with a 4 channel Si bipolar transimpedance amplifier mounted on an epoxy board. The response is wavelength flattened to within 1.0 nm. The overall crosstalk is at least 25 dB down electrically