Abstract
Absorption spectroscopy is a widely used technique that permits the detection and characterization of gas species at low concentrations. We propose a sensing strategy combining the advantages of frequency modulation spectroscopy with the reduced noise properties accessible by squeezing the probe state. A homodyne detection scheme allows the simultaneous measurement of the absorption at multiple frequencies and is robust against dispersion across the absorption profile. We predict a significant enhancement of the signal-to-noise ratio that scales exponentially with the squeezing factor. An order of magnitude improvement beyond the standard quantum limit is possible with state-of-the-art squeezing levels facilitating high precision gas sensing.
Original language | English |
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Article number | 133602 |
Number of pages | 6 |
Journal | Physical Review Letters |
Volume | 130 |
Issue number | 13 |
DOIs | |
Publication status | Published - 28 Mar 2023 |
Bibliographical note
Funding Information:A. B. acknowledges support from the European Research Council starting Grant ERC-2018-STG 803665 and the Engineering and Physical Sciences Research Council Grant EP/S023607/1. All the data needed to evaluate the conclusions of this Letter are present in the main text and in the Supplemental Material.
Publisher Copyright:
© 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Keywords
- Quantum Metrology
- Quantum Optics
- Quantum Sensing
- Photonics
- Integrated Optics
- Squeezed Light
- Optical spectroscopy
- Spectroscopy
- Quantum Information
- Parameter Estimation