Cooling of an integrated Brillouin laser below the thermal limit.

  title={Cooling of an integrated Brillouin laser below the thermal limit.},
  author={William Loh and Dave Kharas and Ryan T. Maxson and Gavin N. West and Alexander Medeiros and Danielle A. Braje and Paul W. Juodawlkis and Robert McConnell},
  journal={Optics express},
  volume={30 13},
Photonically integrated resonators are promising as a platform for enabling ultranarrow linewidth lasers in a compact form factor. Owing to their small size, these integrated resonators suffer from thermal noise that limits the frequency stability of the optical mode to ∼100 kHz. Here, we demonstrate an integrated stimulated Brillouin scattering (SBS) laser based on a large mode-volume annulus resonator that realizes an ultranarrow thermal-noise-limited linewidth of 270 Hz. In practice, yet… 

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