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We present a diode laser heterogeneously integrated with tantalum pentoxide waveguides on a silicon substrate emitting 5 mW continuous-wave power per facet at 1020 nm wavelength with a 14 mA threshold and a 22 dB side-mode-suppression ratio.

Microring resonators in Ta2O5 platform are demonstrated at 780 nm with quality factors > 1.4 million. Devices are engineered with tunable on-chip reflections to create effective cavity lengths of ~ 300 mm, suitable for compact, narrow-linewidth lasers.

Second-harmonic generation is demonstrated with 38 W-1 conversion efficiency in a single-pass waveguide. A highly uniform wafer-scale process is used to fabricate these devices, which are suitable for frequency-comb stabilization.