High gain erbium doped aluminium oxide waveguide amplifiers integrated with silicon nitride circuits in a multi-layer platform

Reactive sputtering provides a scalable and robust approach to fabricate erbium doped waveguide amplifiers and can be used to integrate devices with other waveguide platforms. In this work, we present recent results on high gain (>25 dB) in Al2O3:Er3+ amplifiers fabricated via reactive sputtering, which are vertically integrated with underlying LioniX TriPleX Si3N4 circuitry.