Self-Similar Ultra-High Q Si3N4 Integrated Resonators for Brillouin Laser Linewidth Narrowing and Stabilization

We report an ultra-high Q Si<inf>3</inf>N<inf>4</inf> waveguide resonator Brillouin laser stabilized to an identical waveguide resonator to achieve a linewidth of 292 Hz and a record high stability of 6.5 × 10<sup>−13</sup> at 8 ms.

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