Optical frequency combs based on femtosecond lasers, as developed by T. Haensch and J. Hall, have revolutionised frequency metrology and enabled numerous advances in time measurement, spectroscopy and sensing. Since their discovery in 2007, such frequency combs can also be generated by parametric frequency conversion in a chip-based resonator (microresonator-based frequency combs). The second revolution is underway: microcombs offer not only a compact form factor, wafer-scale fabrication, integration with other optical or electrical functionality on chip. They have been demonstrated for use in world-record petabit-per-second communications, neuromorphic computing and optical clocks. Due to their compact footprint, such microcombs have shown potential as part of a Light Distance Ranging device for the automotive industry. However, microcombs are limited to those who can afford the complex experimental setups required to successfully operate soliton microcombs.
The overall goal of the RaMSoM project is to transition photonic integrated circuit-based microcombs to a turnkey, system-level demonstrator that can be used in the field. We have advanced microcomb technology by offering heterogeneously integrated piezoelectric MEMS actuators based on AlN/PZT. Such a self-contained, frequency-agile, automated soliton microcomb system has lowered the barrier to adoption of microcomb technology and democratised access to it. In addition to maturing the technology, the aim is to develop the basis for commercialisation through competitor analysis, market research, trade fair participation, feasibility studies with industrial partners and the creation of a spin-off company.
