Quantum correlation-enhanced dual-comb spectroscopy

Zhuoren Wan; Yuan Chen; Xiuxiu Zhang; Ming Yan; Heping Zeng

doi:10.1038/s41377-025-01891-1

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Quantum correlation-enhanced dual-comb spectroscopy

Original Articles

- Quantum correlation-enhanced dual-comb spectroscopy
- Quantum correlation-enhanced dual-comb spectroscopy
- LSA 2025年14卷第9期页码：2665-2673
- Affiliations：
  
  1.State Key Laboratory of Precision Spectroscopy, and Hainan Institute, East China Normal University, Shanghai, China
  2.Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, 401120 Chongqing, China
  3.Hainan Institute of East China Normal University, 572025 Sanya, China
  4.Jinan Institute of Quantum Technology, 250101 Jinan, Shandong, China
- Author bio：
  
  Ming Yan (myan@lps.ecnu.edu.cn)
  Heping Zeng (hpzeng@phy.ecnu.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-01891-1
  中图分类号：
- 收稿日期：2024-12-18，
  
  修回日期：2025-04-28，
  
  录用日期：2025-05-12，
  
  网络出版日期：2025-08-01，
  
  纸质出版日期：2025-09-30
- Accepted：
Scan QR Code
Quantum correlation-enhanced dual-comb spectroscopy[J]. LSA, 2025,14(9):2665-2673.

Wan, Z. R. et al. Quantum correlation-enhanced dual-comb spectroscopy. Light: Science & Applications, 14, 2665-2673 (2025).
Quantum correlation-enhanced dual-comb spectroscopy[J]. LSA, 2025,14(9):2665-2673. DOI： 10.1038/s41377-025-01891-1.

Wan, Z. R. et al. Quantum correlation-enhanced dual-comb spectroscopy. Light: Science & Applications, 14, 2665-2673 (2025). DOI： 10.1038/s41377-025-01891-1.

摘要

Abstract

Dual-comb spectroscopy (DCS) is a powerful technique for spectroscopic sensing

offering exceptional spectral bandwidth

resolution

precision

and speed. However

its performance is fundamentally limited by quantum noise inherent to coherent-state optical combs. Here

we overcome this barrier by introducing quantum correlation-enhanced DCS using correlated twin combs generated via seeded four-wave mixing. One comb acts as a local oscillator to decode molecular signals

while the twin suppresses shot noise through intensity-difference squeezing

achieving a 2 dB signal-to-noise ratio improvement beyond the shot-noise limit—equivalent to a 2.6× measurement speed enhancement. Notably

when coupled with up-conversion spectroscopy

our technique records comb-line-resolved

high-resolution (7.5 pm) spectra in the critical 3 μm region for molecular fingerprinting. These results bridge quantum optics and frequency comb spectroscopy

offering great potential for trace gas detection

precision metrology

and chemical analysis. Future developments in detector efficiency and nanophotonic integration could further enhance its scalability and impact.

关键词

Keywords

references

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