{"title":"用扫描波长干涉法动态监测低模长周期光纤光栅。","authors":"Huihui Wang, Bingyi Zhao, Yuehui Ma, Miaomiao Tang, Xutao Wang, Zongcheng Zhang, Zhiqun Yang, Yaping Liu, Zhanhua Huang, Yunqi Liu, Lin Zhang","doi":"10.1364/OL.566246","DOIUrl":null,"url":null,"abstract":"<p><p>We present the dynamic monitoring of long-period fiber gratings (LPFGs) using swept-wavelength interferometry (SWI) for the first time, to our knowledge, including both grating fabrication and its environmental responses. One type of LPFGs designed for mode conversion is fabricated by applying pressure to a few-mode fiber. SWI tests provide mode-dependent losses (MDLs), insertion losses (ILs), and mode conversion efficiencies (MCEs) of the LPFG across the C-band. The LPFG exhibits a maximum MCE of 80.73% at 1550 nm, with an MDL of 0.08 dB and an IL of 0.62 dB. This approach enables the high-quality fabrication of LPFGs and is applicable to various fabrication techniques. Also, dynamic thermal responses of LPFGs are monitored using SWI, which reveals a highly linear relationship (R<sup>2</sup> = 0.99) between mode cross talk (XT) and temperature, providing a new approach for LPFG-based temperature sensing.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"3954-3957"},"PeriodicalIF":3.1000,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dynamic monitoring of few-mode long-period fiber gratings using swept-wavelength interferometry.\",\"authors\":\"Huihui Wang, Bingyi Zhao, Yuehui Ma, Miaomiao Tang, Xutao Wang, Zongcheng Zhang, Zhiqun Yang, Yaping Liu, Zhanhua Huang, Yunqi Liu, Lin Zhang\",\"doi\":\"10.1364/OL.566246\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>We present the dynamic monitoring of long-period fiber gratings (LPFGs) using swept-wavelength interferometry (SWI) for the first time, to our knowledge, including both grating fabrication and its environmental responses. One type of LPFGs designed for mode conversion is fabricated by applying pressure to a few-mode fiber. SWI tests provide mode-dependent losses (MDLs), insertion losses (ILs), and mode conversion efficiencies (MCEs) of the LPFG across the C-band. The LPFG exhibits a maximum MCE of 80.73% at 1550 nm, with an MDL of 0.08 dB and an IL of 0.62 dB. This approach enables the high-quality fabrication of LPFGs and is applicable to various fabrication techniques. Also, dynamic thermal responses of LPFGs are monitored using SWI, which reveals a highly linear relationship (R<sup>2</sup> = 0.99) between mode cross talk (XT) and temperature, providing a new approach for LPFG-based temperature sensing.</p>\",\"PeriodicalId\":19540,\"journal\":{\"name\":\"Optics letters\",\"volume\":\"50 12\",\"pages\":\"3954-3957\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2025-06-15\",\"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.566246\",\"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.566246","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}
Dynamic monitoring of few-mode long-period fiber gratings using swept-wavelength interferometry.
We present the dynamic monitoring of long-period fiber gratings (LPFGs) using swept-wavelength interferometry (SWI) for the first time, to our knowledge, including both grating fabrication and its environmental responses. One type of LPFGs designed for mode conversion is fabricated by applying pressure to a few-mode fiber. SWI tests provide mode-dependent losses (MDLs), insertion losses (ILs), and mode conversion efficiencies (MCEs) of the LPFG across the C-band. The LPFG exhibits a maximum MCE of 80.73% at 1550 nm, with an MDL of 0.08 dB and an IL of 0.62 dB. This approach enables the high-quality fabrication of LPFGs and is applicable to various fabrication techniques. Also, dynamic thermal responses of LPFGs are monitored using SWI, which reveals a highly linear relationship (R2 = 0.99) between mode cross talk (XT) and temperature, providing a new approach for LPFG-based temperature sensing.
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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