High-precision cavity spectroscopy using high-frequency squeezed light

authored by
Jonas Junker, Dennis Wilken, Elanor Huntington, Michèle Heurs
Abstract

In this article, we present a novel spectroscopy technique that improves the signal-to-shot-noise ratio without the need to increase the laser power. Detrimental effects by technical noise sources are avoided by frequency-modulation techniques (frequency up-shifting). Superimposing the signal on non-classical states of light leads to a reduced quantum noise floor. Our method reveals in a proof-of-concept experiment small signals at Hz to kHz frequencies even below the shot noise limit. Our theoretical calculations fully support our experimental findings. The proposed technique is interesting for applications such as high-precision cavity spectroscopy, e.g., for explosive trace gas detection where the specific gas might set an upper limit for the laser power employed.

Organisation(s)
Institute of Gravitation Physics
QuantumFrontiers
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
External Organisation(s)
Australian National University
Max Planck Institute for Gravitational Physics (Albert Einstein Institute)
Type
Article
Journal
Optics express
Volume
29
Pages
6053-6068
No. of pages
16
ISSN
1094-4087
Publication date
10.02.2021
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Atomic and Molecular Physics, and Optics
Electronic version(s)
https://doi.org/10.1364/OE.416713 (Access: Open)
https://doi.org/10.15488/11389 (Access: Open)