Quantum correlation-enhanced dual-comb spectroscopy
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 barr...
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| Format: | Article |
| Language: | English |
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Nature Publishing Group
2025-08-01
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| Series: | Light: Science & Applications |
| Online Access: | https://doi.org/10.1038/s41377-025-01891-1 |
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| author | Zhuoren Wan Yuan Chen Xiuxiu Zhang Ming Yan Heping Zeng |
| author_facet | Zhuoren Wan Yuan Chen Xiuxiu Zhang Ming Yan Heping Zeng |
| author_sort | Zhuoren Wan |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-ce0c52059b0848ae983ffcf504499b29 |
| institution | Kabale University |
| issn | 2047-7538 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Light: Science & Applications |
| spelling | doaj-art-ce0c52059b0848ae983ffcf504499b292025-08-20T03:43:34ZengNature Publishing GroupLight: Science & Applications2047-75382025-08-011411910.1038/s41377-025-01891-1Quantum correlation-enhanced dual-comb spectroscopyZhuoren Wan0Yuan Chen1Xiuxiu Zhang2Ming Yan3Heping Zeng4State Key Laboratory of Precision Spectroscopy, and Hainan Institute, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, and Hainan Institute, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, and Hainan Institute, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, and Hainan Institute, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, and Hainan Institute, East China Normal UniversityAbstract 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.https://doi.org/10.1038/s41377-025-01891-1 |
| spellingShingle | Zhuoren Wan Yuan Chen Xiuxiu Zhang Ming Yan Heping Zeng Quantum correlation-enhanced dual-comb spectroscopy Light: Science & Applications |
| title | Quantum correlation-enhanced dual-comb spectroscopy |
| title_full | Quantum correlation-enhanced dual-comb spectroscopy |
| title_fullStr | Quantum correlation-enhanced dual-comb spectroscopy |
| title_full_unstemmed | Quantum correlation-enhanced dual-comb spectroscopy |
| title_short | Quantum correlation-enhanced dual-comb spectroscopy |
| title_sort | quantum correlation enhanced dual comb spectroscopy |
| url | https://doi.org/10.1038/s41377-025-01891-1 |
| work_keys_str_mv | AT zhuorenwan quantumcorrelationenhanceddualcombspectroscopy AT yuanchen quantumcorrelationenhanceddualcombspectroscopy AT xiuxiuzhang quantumcorrelationenhanceddualcombspectroscopy AT mingyan quantumcorrelationenhanceddualcombspectroscopy AT hepingzeng quantumcorrelationenhanceddualcombspectroscopy |