Thermal-noise-limited, compact optical reference cavity operated without a vacuum enclosure

TL;DR

This paper introduces a compact, in-vacuum optical reference cavity that operates without a vacuum enclosure, achieving thermal noise-limited stability and very low phase noise suitable for precision laser stabilization.

Contribution

The work presents a novel in-vacuum bonded cavity design that eliminates the need for a vacuum enclosure while maintaining ultrastable performance.

Findings

Achieved thermal noise-limited phase noise.

Demonstrated 5x10^{-14} Allan deviation at 1 second.

Developed a compact 9.7 mL-volume cavity.

Abstract

We present an in-vacuum bonded, 9.7 mL-volume Fabry-P\'erot ultrastable optical reference cavity that operates without a vacuum enclosure. A laser stabilized to the cavity demonstrates low, thermal noise-limited phase noise and 5x10^{-14} Allan deviation at 1 second.