Xiao Han, Liang Shang, Sujuan Feng, Guangqiang Liu
{"title":"不同光谱响应的d型长周期光纤光栅及其在增强扭转传感中的应用","authors":"Xiao Han, Liang Shang, Sujuan Feng, Guangqiang Liu","doi":"10.1016/j.yofte.2025.104372","DOIUrl":null,"url":null,"abstract":"<div><div>We demonstrate two arc-induced long period fiber gratings (LPFGs) fabricated on the D-shaped fibers with the same structural parameter, which have a single dip and two resonance dips, respectively. By virtue of the modal analysis for the D-shaped fiber, the resonant coupling characteristics in both LPFGs are compared to reveal the reason for their different spectral responses, which are essentially attributed to the introduced twist effect in the fabrication. Due to the high asymmetry from the structure and fabrication, both D-shaped LPFGs have the polarization dependent performances in torsion and temperature measurements. In the D-shaped LPFG with a single dip, the high torsion sensitivities in the clockwise and counterclockwise directions can be up to 0.248 nm/(rad/m) and 0.223 nm/(rad/m), respectively. In particular, the different shifting directions for resonance wavelength indicate this LPFG with the capability of discriminating twist direction. By contrast, in the D-shaped LPFG with two dips, both resonance wavelengths vary sinusoidally with the twist rate. Because the temperature sensitivities of the two dips are almost equal, the temperature cross-sensitivity can be eliminated by using the wavelength difference between both dips as the characteristic parameter. According to this strategy, the linear relation between the wavelength and twist rate can be achieved with a very high torsion sensitivity of 0.352 nm/(rad/m). The demonstration of two D-shaped LPFGs is beneficial to the development of LPFG-based torsion sensors with a high performance.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"94 ","pages":"Article 104372"},"PeriodicalIF":2.7000,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"D-shaped long period fiber gratings with different spectral responses and their applications in enhanced torsion sensing\",\"authors\":\"Xiao Han, Liang Shang, Sujuan Feng, Guangqiang Liu\",\"doi\":\"10.1016/j.yofte.2025.104372\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>We demonstrate two arc-induced long period fiber gratings (LPFGs) fabricated on the D-shaped fibers with the same structural parameter, which have a single dip and two resonance dips, respectively. By virtue of the modal analysis for the D-shaped fiber, the resonant coupling characteristics in both LPFGs are compared to reveal the reason for their different spectral responses, which are essentially attributed to the introduced twist effect in the fabrication. Due to the high asymmetry from the structure and fabrication, both D-shaped LPFGs have the polarization dependent performances in torsion and temperature measurements. In the D-shaped LPFG with a single dip, the high torsion sensitivities in the clockwise and counterclockwise directions can be up to 0.248 nm/(rad/m) and 0.223 nm/(rad/m), respectively. In particular, the different shifting directions for resonance wavelength indicate this LPFG with the capability of discriminating twist direction. By contrast, in the D-shaped LPFG with two dips, both resonance wavelengths vary sinusoidally with the twist rate. Because the temperature sensitivities of the two dips are almost equal, the temperature cross-sensitivity can be eliminated by using the wavelength difference between both dips as the characteristic parameter. According to this strategy, the linear relation between the wavelength and twist rate can be achieved with a very high torsion sensitivity of 0.352 nm/(rad/m). The demonstration of two D-shaped LPFGs is beneficial to the development of LPFG-based torsion sensors with a high performance.</div></div>\",\"PeriodicalId\":19663,\"journal\":{\"name\":\"Optical Fiber Technology\",\"volume\":\"94 \",\"pages\":\"Article 104372\"},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2025-08-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Optical Fiber Technology\",\"FirstCategoryId\":\"94\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1068520025002470\",\"RegionNum\":3,\"RegionCategory\":\"计算机科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical Fiber Technology","FirstCategoryId":"94","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1068520025002470","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
D-shaped long period fiber gratings with different spectral responses and their applications in enhanced torsion sensing
We demonstrate two arc-induced long period fiber gratings (LPFGs) fabricated on the D-shaped fibers with the same structural parameter, which have a single dip and two resonance dips, respectively. By virtue of the modal analysis for the D-shaped fiber, the resonant coupling characteristics in both LPFGs are compared to reveal the reason for their different spectral responses, which are essentially attributed to the introduced twist effect in the fabrication. Due to the high asymmetry from the structure and fabrication, both D-shaped LPFGs have the polarization dependent performances in torsion and temperature measurements. In the D-shaped LPFG with a single dip, the high torsion sensitivities in the clockwise and counterclockwise directions can be up to 0.248 nm/(rad/m) and 0.223 nm/(rad/m), respectively. In particular, the different shifting directions for resonance wavelength indicate this LPFG with the capability of discriminating twist direction. By contrast, in the D-shaped LPFG with two dips, both resonance wavelengths vary sinusoidally with the twist rate. Because the temperature sensitivities of the two dips are almost equal, the temperature cross-sensitivity can be eliminated by using the wavelength difference between both dips as the characteristic parameter. According to this strategy, the linear relation between the wavelength and twist rate can be achieved with a very high torsion sensitivity of 0.352 nm/(rad/m). The demonstration of two D-shaped LPFGs is beneficial to the development of LPFG-based torsion sensors with a high performance.
期刊介绍:
Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.