Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Frontiers in Optics

Spectral Superresolution via Heterodyne Sensing

Wiktor Kraśnicki, Mateusz Mazelanik, Michał Lipka, Wojciech Wasilewski, Marcin Jarzyna, Konrad Banaszek, Michal P. Parniak

Published Jan 1, 2023• 0 citations
Publisher

Abstract

We demonstrate a practical setup for achieving superresolution in the spectral domain using heterodyne sensing and a spatial analysis technique. The technique has been verified for both coherent and thermal states for various signal-to-noise ratios.
DOI
10.1364/fio.2023.fw5d.5

Related papers

Unlocking Sub-Diffraction Spectral Resolution with Quantum-Enhanced Heterodyne Detection

Wiktor Krokosz, Mateusz Mazelanik, Michał Lipka +4 more

Quantum-inspired superresolution techniques surpass conventional diffraction limits. By utilizing homodyne detection and tailored data analysis, our experimental study demonstrates enhanced spectroscopic resolution for various light sources, corroborated by theoretical predictions.

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)•Aug 4, 2024•0 citations

Beating the spectroscopic Rayleigh limit via post-processed heterodyne detection

Wiktor Krokosz, Mateusz Mazelanik, Michał Lipka +4 more

Quantum-inspired superresolution methods surpass the Rayleigh limit in imaging, or the analogous Fourier limit in spectroscopy. This is achieved by carefully extracting the information carried in the emitted optical field by engineered measurements. An alternative to complex experimental setups is to use simple homodyne detection and customized data analysis. We experimentally investigate this method in the time-frequency domain and demonstrate the spectroscopic superresolution for two distinct types of light sources: thermal and phase-averaged coherent states. The experimental results are backed by theoretical predictions based on estimation theory.

arXiv:2311.10574•Optics Letters•Jan 17, 2024•6 citations

Enhanced sensitivity in Rydberg-atom-based dual-channel heterodyne receivers via cross-spectral analysis

Jianfei Tian, Wenguang Yang, Hao Zhang +5 more

Cross-spectral analysis is widely used for weak-signal extraction due to its ability to suppress uncorrelated noise. The common frequency-correlated noise of the probe laser in different detection channels restricts the cross-spectral noise suppression and degrades sensitivity. We propose and experimentally demonstrate a dual-channel Rydberg heterodyne scheme based on asymmetric optical detuning. This method with cross-spectral density (CSD) processing reduces the interchannel probe-frequency noise correlation while preserving the common microwave-induced atomic response essential for signal coherence. Experimental results confirm that asymmetric detuning selectively suppresses laser-noise-induced coherence without degrading signal correlation and thus improves the signal-to-noise ratio (SNR). Compared with single-channel power spectral density (PSD) analysis, this method reduces the noise floor and improves the SNR by 12 dB for the resonant case and by 3.7 dB for the detuned case. These results provide a practical and readily implementable strategy for suppressing correlated technical noise in Rydberg heterodyne receivers, advancing the development of high-sensitivity electric-field metrology.

Photonics Research•Aug 26, 2026•0 citations

Balanced-heterodyne detection of sub-shot-noise optical signals

Sheng Feng, Lu, Zehuan, Jie Zhang +1 more

As part of the effort to make use of squeezed states of light for detection of sub-shot-noise optical signals, we study the balanced heterodyne scheme, for which the corresponding spectral density of the photocurrent fluctuations produced at the output of the detector is calculated as the Fourier transform of their autocorrelation function. Our analysis shows that, for maximal signal-to-noise ratio enhancement by use of squeezed states of light, an optical signal to be measured must be carried in the squeezed quadrature of the carrier field. We discuss how "the additional heterodyne noise" can be eliminated in this scheme and its potential application to gravitational-wave searching. To demonstrate the practical feasibility, we propose and study a phase-locking technique for this scheme.

arXiv:1112.3155•Dec 14, 2011•1 citation

Superresolution at the quantum limit with coherent light and a homodyne-based parity detection scheme

Kaushik Parasuram Seshadreesan, Petr M. Anisimov, Hwang Lee +1 more

APS•Jun 1, 2012•0 citations

Sensing subhertz optical signals at the quantum noise limit with heterodyne detectors

Boya Xie, Dechao He, Peng Yang +1 more

Sensors and Actuators A Physical•Apr 16, 2022•6 citations
Quantum-inspired superresolution methods surpass the Rayleigh limit in imaging, or the analogous Fourier limit in spectroscopy. This is achieved by carefully extracting the information carried in the emitted optical field by engineered measurements. An alternative to complex experimental setups is to use simple homodyne detection and customized data analysis. We experimentally investigate this method in the time-frequency domain and demonstrate the spectroscopic superresolution for two distinct types of light sources: thermal and phase-averaged coherent states. The experimental results are backed by theoretical predictions based on estimation theory.
Cross-spectral analysis is widely used for weak-signal extraction due to its ability to suppress uncorrelated noise. The common frequency-correlated noise of the probe laser in different detection channels restricts the cross-spectral noise suppression and degrades sensitivity. We propose and experimentally demonstrate a dual-channel Rydberg heterodyne scheme based on asymmetric optical detuning. This method with cross-spectral density (CSD) processing reduces the interchannel probe-frequency noise correlation while preserving the common microwave-induced atomic response essential for signal coherence. Experimental results confirm that asymmetric detuning selectively suppresses laser-noise-induced coherence without degrading signal correlation and thus improves the signal-to-noise ratio (SNR). Compared with single-channel power spectral density (PSD) analysis, this method reduces the noise floor and improves the SNR by 12 dB for the resonant case and by 3.7 dB for the detuned case. These results provide a practical and readily implementable strategy for suppressing correlated technical noise in Rydberg heterodyne receivers, advancing the development of high-sensitivity electric-field metrology.
As part of the effort to make use of squeezed states of light for detection of sub-shot-noise optical signals, we study the balanced heterodyne scheme, for which the corresponding spectral density of the photocurrent fluctuations produced at the output of the detector is calculated as the Fourier transform of their autocorrelation function. Our analysis shows that, for maximal signal-to-noise ratio enhancement by use of squeezed states of light, an optical signal to be measured must be carried in the squeezed quadrature of the carrier field. We discuss how "the additional heterodyne noise" can be eliminated in this scheme and its potential application to gravitational-wave searching. To demonstrate the practical feasibility, we propose and study a phase-locking technique for this scheme.