Fig. 1. Laser frequency noise.

Sub-Hertz Fundamental Linewidth Infra-red SBS Lasers

Demonstrate an integrated 1550 nm Brillouin laser with 10.4 mW threshold and 0.72 Hz fundamental linewidth.
Stabilized SBS laser

On-chip Laser Stabilization Reaching the Thermorefractive Noise Limit

Achieving a 330 Hz integral linewidth and 2.7 Hz fundamental linewidth and Allan deviation of 6.5×10-13 at 8 ms.
Sr atomic clock

Visible Integrated Brillouin Laser

Demonstrate a 674 nm Brillouin laser with 14.7 mW threshold and 269 Hz fundamental linewidth.