Femtosecond Laser Inscribed Sapphire Fiber Bragg Grating for High Temperature and Strain Sensing
| Autor: | Yang Zhao, Xin-Yu Ming, Zhong-Ming Zheng, Yong-Sen Yu, Qi-Dai Chen, Han Yang, Peng-Long Wang, Zhen-Nan Tian, Qi Guo, Hong-Bo Sun, Chao Chen |
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| Rok vydání: | 2019 |
| Předmět: |
Temperature sensitivity
Materials science Strain (chemistry) business.industry 02 engineering and technology Grating 021001 nanoscience & nanotechnology Laser Computer Science Applications law.invention Fiber Bragg grating law Femtosecond Optoelectronics Fiber Electrical and Electronic Engineering 0210 nano-technology business Sapphire fiber |
| Zdroj: | IEEE Transactions on Nanotechnology. 18:208-211 |
| ISSN: | 1941-0085 1536-125X |
| Popis: | In this letter, a sapphire fiber Bragg grating (SFBG) is fabricated by a femtosecond laser line-by-line scanning method. A third-order fiber Bragg grating is obtained in a single crystal sapphire fiber with a diameter of 60 μ m. Compared to the SFBG written by a point-by-point method, the SFBG written by the line-by-line method has a higher reflectivity and grating with about 15% reflectivity is achieved when the track length is about 40 μ m. The temperature sensing characteristics of this SFBG from a room temperature to 1600 °C are studied, and the temperature sensitivity of SFBG is 34.96 pm/°C from 1000 °C to 1600 °C. The strain characteristics are also tested at the temperature of 26 °C, 500 °C, 1000 °C, and 1600 °C, and the strain sensitivities are 1.42, 1.42, 1.44, and 1.45 pm/μϵ, respectively. These characteristics show that this SFBG has potential applications in a harsh environment structural health monitoring. |
| Databáze: | OpenAIRE |
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