{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T01:46:19Z","timestamp":1779327979816,"version":"3.51.4"},"reference-count":48,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2021,1,29]],"date-time":"2021-01-29T00:00:00Z","timestamp":1611878400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Shenzhen Fundamental Research Funding","award":["JCYJ20200109143008165"],"award-info":[{"award-number":["JCYJ20200109143008165"]}]},{"name":"Shenzhen Fundamental Research Funding","award":["JCYJ20170412171535171"],"award-info":[{"award-number":["JCYJ20170412171535171"]}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51835007"],"award-info":[{"award-number":["51835007"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Tsinghua Shenzhen International Graduate School cross-research and innovation funding","award":["JC20170003"],"award-info":[{"award-number":["JC20170003"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Dual-comb spectroscopy has been an infusive spectroscopic tool for gas detection due to its high resolution, high sensitivity, and fast acquisition speed over a broad spectral range without any mechanical scanning components. However, the complexity and cost of high-performance dual-comb spectroscopy are still high for field-deployed applications. To solve this problem, we propose a simple frequency domain post-processing method by extracting the accurate position of a specific absorption line frame by frame. After aligning real-time spectra and averaging for one second, the absorbance spectrum of H13C14N gas in the near-infrared is obtained over 1.1 THz spectral range. By using this method, the standard deviation of residual error is only ~0.002, showing great agreement with the conventional correction method. In addition, the spectral resolution is improved from 13.4 GHz to 4.3 GHz compared to direct spectrum averaging. Our method does not require a specially designed common-mode suppression comb, rigorous frequency control system, or complicated computational algorithm, providing a cost-effective scheme for field-deployed Doppler-limited spectroscopy applications.<\/jats:p>","DOI":"10.3390\/s21030903","type":"journal-article","created":{"date-parts":[[2021,1,29]],"date-time":"2021-01-29T09:25:22Z","timestamp":1611912322000},"page":"903","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Improving Resolution of Dual-Comb Gas Detection Using Periodic Spectrum Alignment Method"],"prefix":"10.3390","volume":"21","author":[{"given":"Haoyang","family":"Yu","sequence":"first","affiliation":[{"name":"Division of Advanced Manufacturing, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qian","family":"Zhou","sequence":"additional","affiliation":[{"name":"Division of Advanced Manufacturing, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xinghui","family":"Li","sequence":"additional","affiliation":[{"name":"Division of Advanced Manufacturing, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaohao","family":"Wang","sequence":"additional","affiliation":[{"name":"Division of Advanced Manufacturing, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5285-365X","authenticated-orcid":false,"given":"Xilin","family":"Wang","sequence":"additional","affiliation":[{"name":"Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8763-0061","authenticated-orcid":false,"given":"Kai","family":"Ni","sequence":"additional","affiliation":[{"name":"Division of Advanced Manufacturing, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,1,29]]},"reference":[{"key":"ref_1","first-page":"233","article-title":"Optical frequency metrology","volume":"416","author":"Udem","year":"2002","journal-title":"Nat. Cell Biol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"325","DOI":"10.1103\/RevModPhys.75.325","article-title":"Colloquium: Femtosecond optical frequency combs","volume":"75","author":"Cundiff","year":"2003","journal-title":"Rev. Mod. Phys."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1038\/s42005-019-0249-y","article-title":"20 years of developments in optical frequency comb technology and applications","volume":"2","author":"Fortier","year":"2019","journal-title":"Commun. Phys."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"082402","DOI":"10.7567\/APEX.8.082402","article-title":"Ultra-broadband dual-comb spectroscopy across 1.0\u20131.9 \u00b5m","volume":"8","author":"Sho","year":"2015","journal-title":"Appl. Phys. Express"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"440","DOI":"10.1038\/nphoton.2012.142","article-title":"Mid-infrared frequency combs","volume":"6","author":"Schliesser","year":"2012","journal-title":"Nat. Photonics"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"462","DOI":"10.1038\/nphoton.2014.85","article-title":"Terahertz laser frequency combs","volume":"8","author":"Burghoff","year":"2014","journal-title":"Nat. Photon"},{"key":"ref_7","first-page":"68","article-title":"Direct frequency comb spectroscopy in the extreme ultraviolet","volume":"482","author":"Yost","year":"2012","journal-title":"Nat. Cell Biol."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1038\/s41566-018-0347-5","article-title":"Frequency comb spectroscopy","volume":"13","year":"2019","journal-title":"Nat. Photon"},{"key":"ref_9","first-page":"627","article-title":"Molecular fingerprinting with the resolved modes of a femtosecond laser frequency comb","volume":"445","author":"Diddams","year":"2007","journal-title":"Nat. Cell Biol."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"21861","DOI":"10.1364\/OE.18.021861","article-title":"Mid-infrared Fourier transform spectroscopy with a broadband frequency comb","volume":"18","author":"Adler","year":"2010","journal-title":"Opt. Express"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"414","DOI":"10.1364\/OPTICA.3.000414","article-title":"Dual-comb spectroscopy","volume":"3","author":"Coddington","year":"2016","journal-title":"Optica"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1542","DOI":"10.1364\/OL.29.001542","article-title":"Time-domain mid-infrared frequency-comb spectrometer","volume":"29","author":"Keilmann","year":"2004","journal-title":"Opt. Lett."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"013902","DOI":"10.1103\/PhysRevLett.100.013902","article-title":"Coherent Multiheterodyne Spectroscopy Using Stabilized Optical Frequency Combs","volume":"100","author":"Coddington","year":"2008","journal-title":"Phys. Rev. Lett."},{"key":"ref_14","first-page":"355","article-title":"Coherent Raman spectro-imaging with laser frequency combs","volume":"502","author":"Ideguchi","year":"2013","journal-title":"Nat. Cell Biol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1389","DOI":"10.1126\/science.aao1090","article-title":"Frequency combs enable rapid and high-resolution multidimensional coherent spectroscopy","volume":"357","author":"Lomsadze","year":"2017","journal-title":"Science"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"041301","DOI":"10.1063\/1.4976730","article-title":"Development of ultrafast time-resolved dual-comb spectroscopy","volume":"2","author":"Asahara","year":"2017","journal-title":"APL Photon"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1038\/s41467-017-00709-y","article-title":"Dual-comb spectroscopic ellipsometry","volume":"8","author":"Minamikawa","year":"2017","journal-title":"Nat. Commun."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"11141","DOI":"10.1364\/OE.21.011141","article-title":"Static FBG strain sensor with high resolution and large dynamic range by dual-comb spectroscopy","volume":"21","author":"Kuse","year":"2013","journal-title":"Opt. Express"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"199","DOI":"10.1364\/OPTICA.382887","article-title":"Direct hyperspectral dual-comb imaging","volume":"7","author":"Khan","year":"2020","journal-title":"Optica"},{"key":"ref_20","first-page":"772","article-title":"Dual-Comb Ranging","volume":"4","author":"Zhu","year":"2018","journal-title":"Engeneering"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"4058","DOI":"10.1364\/OE.382943","article-title":"Multi-pulse sampling dual-comb ranging method","volume":"28","author":"Zhou","year":"2020","journal-title":"Opt. Express"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"6996","DOI":"10.1364\/OE.22.006996","article-title":"Operation of an optically coherent frequency comb outside the metrology lab","volume":"22","author":"Sinclair","year":"2014","journal-title":"Opt. Express"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"465","DOI":"10.1364\/AOP.8.000465","article-title":"Ultralow-noise mode-locked fiber lasers and frequency combs: Principles, status, and applications","volume":"8","author":"Kim","year":"2016","journal-title":"Adv. Opt. Photon"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1016\/j.jms.2019.01.001","article-title":"Real-time liquid-phase organic reaction monitoring with mid-infrared attenuated total reflectance dual frequency comb spectroscopy","volume":"356","author":"Herman","year":"2019","journal-title":"J. Mol. Spectrosc."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"320","DOI":"10.1364\/OPTICA.5.000320","article-title":"Regional trace-gas source attribution using a field-deployed dual frequency comb spectrometer","volume":"5","author":"Coburn","year":"2018","journal-title":"Optica"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"4177","DOI":"10.5194\/acp-19-4177-2019","article-title":"Estimating vehicle carbon dioxide emissions from Boulder, Colorado, using horizontal path-integrated column measurements","volume":"19","author":"Waxman","year":"2019","journal-title":"Atmos. Chem. Phys. Discuss."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"121116","DOI":"10.1063\/1.4799282","article-title":"Real-time dual frequency comb spectroscopy in the near infrared","volume":"102","author":"Zhu","year":"2013","journal-title":"Appl. Phys. Lett."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"5041","DOI":"10.1364\/OE.18.005041","article-title":"Timing jitter and phase noiseof mode-locked fiber lasers","volume":"18","year":"2010","journal-title":"Opt. Express"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"043817","DOI":"10.1103\/PhysRevA.82.043817","article-title":"Coherent dual-comb spectroscopy at high signal-to-noise ratio","volume":"82","author":"Coddington","year":"2010","journal-title":"Phys. Rev. A"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"21833","DOI":"10.1364\/OE.24.021833","article-title":"Picometer-resolution dual-comb spectroscopy with a free-running fiber laser","volume":"24","author":"Zhao","year":"2016","journal-title":"Opt. Express"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"116102","DOI":"10.1063\/1.5117847","article-title":"Computational Doppler-limited dual-comb spectroscopy with a free-running all-fiber laser","volume":"4","author":"Sterczewski","year":"2019","journal-title":"APL Photon"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1007\/s00340-020-7382-x","article-title":"Multipass-assisted dual-comb gas sensor for multi-species de-tection using a free-running fiber laser","volume":"126","author":"Xu","year":"2020","journal-title":"Appl. Phys. B"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"112402","DOI":"10.1143\/APEX.5.112402","article-title":"Comb-Resolved Dual-Comb Spectroscopy Stabilized by Free-Running Continuous-Wave Lasers","volume":"5","author":"Kuse","year":"2012","journal-title":"Appl. Phys. Express"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"3375","DOI":"10.1038\/ncomms4375","article-title":"Adaptive real-time dual-comb spectroscopy","volume":"5","author":"Ideguchi","year":"2014","journal-title":"Nat. Commun."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"883","DOI":"10.1364\/PRJ.7.000883","article-title":"Adaptive cavity-enhanced dual-comb spectroscopy","volume":"7","author":"Zhang","year":"2019","journal-title":"Photon Res."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"21932","DOI":"10.1364\/OE.20.021932","article-title":"Continuous real-time correction and averaging for frequency comb interferometry","volume":"20","author":"Roy","year":"2012","journal-title":"Opt. Express"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"8168","DOI":"10.1364\/OE.25.008168","article-title":"Self-corrected chip-based dual-comb spectrometer","volume":"25","author":"Genest","year":"2017","journal-title":"Opt. Express"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"29425","DOI":"10.1364\/OE.27.029425","article-title":"Digital error correction of dual-comb interferometer without external optical referencing information","volume":"27","author":"Yu","year":"2019","journal-title":"Opt. Express"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1109\/JQE.2019.2918935","article-title":"Self-Correction Limits in Dual-Comb Interferometry","volume":"55","author":"Hebert","year":"2019","journal-title":"IEEE J. Quantum Electron."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"23875","DOI":"10.1364\/OE.27.023875","article-title":"Computational coherent averaging for free-running dual-comb spectroscopy","volume":"27","author":"Sterczewski","year":"2019","journal-title":"Opt. Express"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"9029","DOI":"10.1364\/OPEX.13.009029","article-title":"Frequency-comb infrared spectrometer for rapid, remote chemical sensing","volume":"13","author":"Schliesser","year":"2005","journal-title":"Opt. Express"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"5192","DOI":"10.1038\/ncomms6192","article-title":"Dual-comb spectroscopy based on quantum-cascade-laser frequency combs","volume":"5","author":"Villares","year":"2014","journal-title":"Nat. Commun."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"16072","DOI":"10.1364\/OE.25.016072","article-title":"Dual-comb mid-infrared spectroscopy with free-running oscillators and absolute optical calibration from a radio-frequency reference","volume":"25","author":"Kara","year":"2017","journal-title":"Opt. Express"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"16813","DOI":"10.1364\/OE.26.016813","article-title":"Digital correction method for realizing a phase-stable dual-comb interferometer","volume":"26","author":"Zhu","year":"2018","journal-title":"Opt. Express"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1016\/j.jqsrt.2012.11.024","article-title":"Broad-band frequency references in the near-infrared: Accurate dual comb spectroscopy of methane and acetylene","volume":"118","author":"Zolot","year":"2013","journal-title":"J. Quant. Spectrosc. Radiat. Transf."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"638","DOI":"10.1364\/OL.37.000638","article-title":"Direct-comb molecular spectroscopy with accurate, resolved comb teeth over 43 THz","volume":"37","author":"Zolot","year":"2012","journal-title":"Opt. Lett."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"600","DOI":"10.1126\/science.aah6516","article-title":"Microresonator soliton dual-comb spectroscopy","volume":"354","author":"Suh","year":"2016","journal-title":"Science"},{"key":"ref_48","first-page":"1","article-title":"Silicon-chip-based mid-infrared dual-comb spectroscopy","volume":"9","author":"Yu","year":"2018","journal-title":"Nat. Commun."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/3\/903\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:17:03Z","timestamp":1760159823000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/3\/903"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,1,29]]},"references-count":48,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2021,2]]}},"alternative-id":["s21030903"],"URL":"https:\/\/doi.org\/10.3390\/s21030903","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,1,29]]}}}