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Final PhD Seminar

Hybrid integration towards single-chip Brillouin devices

Mr Choon Kong Lai
Laser Physics Centre, ANU

On-chip RF signal processing and generation via the stimulated Brillouin scattering (SBS) process have become significant research topics in the past few years due to their unmatched capabilities. Having access to gigahertz repetition rates can enable applications such as RF filters, true time delay (TTD), optoelectronic oscillator (OEO), and optical frequency comb (OFC). Chalcogenide glass, and in particularly Arsenic Trisulfide, has becoming a popular optical material due to its high optical nonlinearity, near ideal acoustic properties for SBS applications. However, monolithic integration cannot be realised using chalcogenide glass due to its high propagation loss, fibre-to-chip coupling loss, and facet reflection. In this presentation, a hybrid waveguide solution will be proposed. This includes the fabrication of a low loss material platform which can allow some on-chip linear functionalities such as Bragg gratings and tolerant couplers to realise the fully integrated SBS device.


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