Sapphire-Derived Fiber Bragg Gratings for High Temperature Sensing
In this paper, a sapphire-derived fiber (SDF) with a core diameter of 10 μm and a cladding diameter of 125 μm is fabricated by the melt-in-tube method, and fiber Bragg gratings (FBGs) with reflectivity over 80% are prepared by the femtosecond laser point-by-point direct writing method. By analyzing...
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MDPI AG
2021-08-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/11/8/946 |
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| author | Qi Guo Zhixu Jia Xuepeng Pan Shanren Liu Zhennan Tian Zhongming Zheng Chao Chen Guanshi Qin Yongsen Yu |
| author_facet | Qi Guo Zhixu Jia Xuepeng Pan Shanren Liu Zhennan Tian Zhongming Zheng Chao Chen Guanshi Qin Yongsen Yu |
| author_sort | Qi Guo |
| collection | DOAJ |
| description | In this paper, a sapphire-derived fiber (SDF) with a core diameter of 10 μm and a cladding diameter of 125 μm is fabricated by the melt-in-tube method, and fiber Bragg gratings (FBGs) with reflectivity over 80% are prepared by the femtosecond laser point-by-point direct writing method. By analyzing the refractive index distribution and reflection spectral characteristics of the SDF, it can be seen that the SDF is a graded refractive index few-mode fiber. In order to study the element composition of the SDF core, the end-face element distribution of the SDF is analyzed, which indicates that element diffusion occurred between the core and the cladding materials. The temperature and stress of the SDF gratings are measured and the highest temperature is tested to 1000 °C. The temperature and strain sensitivities are 15.64 pm/°C and 1.33 pm/με, respectively, which are higher than the temperature sensitivity of the quartz single-mode fiber. As a kind of special fiber, the SDF expands the application range of sapphire fiber, and has important applications in the fields of high-temperature sensing and high-power lasers. |
| first_indexed | 2024-03-10T08:54:06Z |
| format | Article |
| id | doaj.art-ef827c3438e2486eb3cd12aff6cab8ee |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T08:54:06Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-ef827c3438e2486eb3cd12aff6cab8ee2023-11-22T07:17:14ZengMDPI AGCrystals2073-43522021-08-0111894610.3390/cryst11080946Sapphire-Derived Fiber Bragg Gratings for High Temperature SensingQi Guo0Zhixu Jia1Xuepeng Pan2Shanren Liu3Zhennan Tian4Zhongming Zheng5Chao Chen6Guanshi Qin7Yongsen Yu8State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, ChinaState Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, ChinaState Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, ChinaState Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, ChinaState Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaState Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, ChinaState Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, ChinaIn this paper, a sapphire-derived fiber (SDF) with a core diameter of 10 μm and a cladding diameter of 125 μm is fabricated by the melt-in-tube method, and fiber Bragg gratings (FBGs) with reflectivity over 80% are prepared by the femtosecond laser point-by-point direct writing method. By analyzing the refractive index distribution and reflection spectral characteristics of the SDF, it can be seen that the SDF is a graded refractive index few-mode fiber. In order to study the element composition of the SDF core, the end-face element distribution of the SDF is analyzed, which indicates that element diffusion occurred between the core and the cladding materials. The temperature and stress of the SDF gratings are measured and the highest temperature is tested to 1000 °C. The temperature and strain sensitivities are 15.64 pm/°C and 1.33 pm/με, respectively, which are higher than the temperature sensitivity of the quartz single-mode fiber. As a kind of special fiber, the SDF expands the application range of sapphire fiber, and has important applications in the fields of high-temperature sensing and high-power lasers.https://www.mdpi.com/2073-4352/11/8/946sapphire-derived fiber (SDF)melt-in-tube methodfiber Bragg gratings (FBGs)femtosecond laser |
| spellingShingle | Qi Guo Zhixu Jia Xuepeng Pan Shanren Liu Zhennan Tian Zhongming Zheng Chao Chen Guanshi Qin Yongsen Yu Sapphire-Derived Fiber Bragg Gratings for High Temperature Sensing Crystals sapphire-derived fiber (SDF) melt-in-tube method fiber Bragg gratings (FBGs) femtosecond laser |
| title | Sapphire-Derived Fiber Bragg Gratings for High Temperature Sensing |
| title_full | Sapphire-Derived Fiber Bragg Gratings for High Temperature Sensing |
| title_fullStr | Sapphire-Derived Fiber Bragg Gratings for High Temperature Sensing |
| title_full_unstemmed | Sapphire-Derived Fiber Bragg Gratings for High Temperature Sensing |
| title_short | Sapphire-Derived Fiber Bragg Gratings for High Temperature Sensing |
| title_sort | sapphire derived fiber bragg gratings for high temperature sensing |
| topic | sapphire-derived fiber (SDF) melt-in-tube method fiber Bragg gratings (FBGs) femtosecond laser |
| url | https://www.mdpi.com/2073-4352/11/8/946 |
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