Integrated MQW Optical Amplifier/Noise-Filter/Photodetector

A monolithically integrated photonic circuit with an InGaAs / InGaAsP multiple-quantum-well (MQW) traveling- wave optical amplifier, a Brag reflection grating-folded noise filter, and an MQW photodetector has been demonstrated. This photonic circuit offers potential as a preamplfiied lightwave receiver.