COMPRESSIVE-STRAINED MULTI-QUANTUM-WELL WAVE-GUIDE PHOTODETECTORS FORCOHERENT RECEIVERS

Waveguide photodetectors (1.5 mu m) for polarization diversity coheren t receivers have been fabricated on InP and characterized. They make u se of the properties of multiquantum wells (MQW) to detect separately the TE and the TM polarized light. Diversity detection is achieved wit hout the use of a polarization splitter or polarization controllers. T he structure is compatible with the fabrication of DBR lasers and guid ed devices, so it is well suited for integration with other devices in the same chip.