{"title":"打破分辨率-距离权衡：在拉曼分布式光纤传感器中使用相关解调，超过14公里的50厘米空间分辨率。","authors":"Xinyue Zhang, Jian Li, Bowen Fan, Zijia Cheng, Xin Huang, Xiaohui Xue, Mingjiang Zhang","doi":"10.1364/OL.560755","DOIUrl":null,"url":null,"abstract":"<p><p>The spatial resolution and sensing distance of Raman distributed optical fiber sensors are constrained by the pulse width and the inherently weak Raman scattering signals. Consequently, the spatial resolution for kilometer-level detection distances is typically limited to the order of meters. To address this principle limitation, this study proposes a Raman distributed optical fiber sensing scheme based on amplified spontaneous emission (ASE) correlation detection. By performing a cross correlation operation between the ASE detection signal and the reconstructed Raman anti-Stokes signal, the system effectively captures the weaker intensity information of Raman anti-Stokes light, thereby enhancing spatial resolution. Experimental results demonstrate a spatial resolution of 50 cm over a distributed temperature-sensing distance exceeding 14.0 km.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 9","pages":"3014-3017"},"PeriodicalIF":3.1000,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Breaking the resolution-distance trade-off: 50-cm spatial resolution over 14 km using correlation demodulation in Raman distributed fiber sensors.\",\"authors\":\"Xinyue Zhang, Jian Li, Bowen Fan, Zijia Cheng, Xin Huang, Xiaohui Xue, Mingjiang Zhang\",\"doi\":\"10.1364/OL.560755\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The spatial resolution and sensing distance of Raman distributed optical fiber sensors are constrained by the pulse width and the inherently weak Raman scattering signals. Consequently, the spatial resolution for kilometer-level detection distances is typically limited to the order of meters. To address this principle limitation, this study proposes a Raman distributed optical fiber sensing scheme based on amplified spontaneous emission (ASE) correlation detection. By performing a cross correlation operation between the ASE detection signal and the reconstructed Raman anti-Stokes signal, the system effectively captures the weaker intensity information of Raman anti-Stokes light, thereby enhancing spatial resolution. Experimental results demonstrate a spatial resolution of 50 cm over a distributed temperature-sensing distance exceeding 14.0 km.</p>\",\"PeriodicalId\":19540,\"journal\":{\"name\":\"Optics letters\",\"volume\":\"50 9\",\"pages\":\"3014-3017\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2025-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Optics letters\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1364/OL.560755\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"OPTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.560755","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
Breaking the resolution-distance trade-off: 50-cm spatial resolution over 14 km using correlation demodulation in Raman distributed fiber sensors.
The spatial resolution and sensing distance of Raman distributed optical fiber sensors are constrained by the pulse width and the inherently weak Raman scattering signals. Consequently, the spatial resolution for kilometer-level detection distances is typically limited to the order of meters. To address this principle limitation, this study proposes a Raman distributed optical fiber sensing scheme based on amplified spontaneous emission (ASE) correlation detection. By performing a cross correlation operation between the ASE detection signal and the reconstructed Raman anti-Stokes signal, the system effectively captures the weaker intensity information of Raman anti-Stokes light, thereby enhancing spatial resolution. Experimental results demonstrate a spatial resolution of 50 cm over a distributed temperature-sensing distance exceeding 14.0 km.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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