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)

BibTeX

@article{75f911c312a440a7a181f18a9166bd72,
title = "High-precision cavity spectroscopy using high-frequency squeezed light",
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.",
author = "Jonas Junker and Dennis Wilken and Elanor Huntington and Mich{\`e}le Heurs",
note = "Funding Information: Deutsche Forschungsgemeinschaft (Excellence PhoenixD (EXC 2122, Project ID 390833453), Excellence QuantumFrontiers (EXC 2123, Project ID 390837967)).",
year = "2021",
month = feb,
day = "10",
doi = "10.1364/OE.416713",
language = "English",
volume = "29",
pages = "6053--6068",
journal = "Optics express",
issn = "1094-4087",
publisher = "OSA - The Optical Society",
number = "4",
}