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Photonic-Based Microwave Signal Generation using and Hybrid Integrated Optical Heterodyne Source

Abstract:

The generation of microwave signals is dominated by photonics-based systems pushing the development of ultra-broadband wireless communication links. Different photonic integrated circuits or hybrid integration devices have been proposed to implement different photonic signal generation techniques offering different semiconductor laser structures. Here, we present a hybrid integrated optical heterodyne source based on the InPSi3N4 integration platform. The module integrates two laser structures followed by different optical components to tune the generated wavelength. Each laser structure has a tuning range over >100 nm. We demonstrate the generation of a free-running beat-note from 70 to 110 GHz with a linewidth less than 108 kHz.