We present two different approaches for the generation of millimeter wave carrier signals for wireless data links based on photonic integrated circuits using the optical heterodyne technique. One approach, based on dedicated fabrication run, integrates all the required components on a single chip. A second approach is based on a multi-project wafer run on a generic integration platform. We demonstrate their application to wireless data transmission at 1 Gbps data rate without the requirement for phase stabilization schemes of the two wavelengths.
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