Low noise near-concentric optical cavity design

Florentin Adam; Wen Xin Chiew; Adrian Nugraha Utama; Christian Kurtsiefer

doi:10.1063/5.0191123

Low noise near-concentric optical cavity design

Rev Sci Instrum. 2024 Apr 1;95(4):043102. doi: 10.1063/5.0191123.

Authors

Florentin Adam¹, Wen Xin Chiew¹, Adrian Nugraha Utama¹, Christian Kurtsiefer^{1

2}

Affiliations

¹ Center for Quantum Technologies, 3 Science Drive 2, Singapore 117543.
² Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542.

PMID: 38602458
DOI: 10.1063/5.0191123

Abstract

Near-concentric cavities are excellent tools for enhancing an atom-light interaction as they combine a small mode volume with a large optical access for atom manipulation. However, they are sensitive to longitudinal and transverse misalignments. To address this sensitivity, we present a compact near-concentric optical cavity system with a residual cavity length variation δLC,rms = 0.36(2) Å. A key part of this system is a cage-like tensegrity mirror support structure that allows us to correct for longitudinal and transverse misalignments. The system is stable enough to allow the use of mirrors with a higher cavity finesse to enhance the atom-light coupling strength in cavity-QED applications.