Sapphire fiber Bragg gratings inscribed with a femtosecond laser line-by-line scanning technique
Sapphire fiber Bragg gratings inscribed with a femtosecond laser line-by-line scanning technique
复制标题
采用飞秒激光逐行扫描技术刻写的蓝宝石光纤布拉格光栅
DOI：
10.1364/ol.43.004562
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发表时间：
2018-10-01
期刊：
影响因子：
3.6
通讯作者：
Wang, Yiping
中科院分区：
文献类型：
--
作者：
Xu, Xizhen;He, Jun;Wang, Yiping
我们提出并演示了利用飞秒激光逐行扫描技术制作单晶蓝宝石光纤布拉格光栅（SFBG）。这种方法提供了一种用于生产具有可接受反射率的各种布拉格波长的SFBG的稳健方法。研究了不同光纤直径、不同轨道长度和不同光栅间距的SFBG的光谱特性。通过优化工艺参数，得到了反射率为6.3%的SFBG。此外，成功地构建了由五个不同波长的SFBG组成的串联阵列。对SFBG的高温响应进行了测试，实验结果表明SFBG可以承受1612 ℃的高温。此外，在高温区域实现了36.5 pm/℃的温度灵敏度。这种超导布拉格光栅有望成为航空发动机高温传感器. (C)2018美国光学学会
We propose and demonstrate the fabrication of single-crystal sapphire fiber Bragg gratings (SFBGs) using a femtosecond laser line-by-line scanning technique. This approach provides a robust method for producing SFBGs at various Bragg wavelengths with an acceptable reflectivity. The spectrum characteristics of the SFBGs with various fiber diameters, track lengths, and grating pitch quantities were investigated. An SFBG with a reflectivity of 6.3% was obtained via optimization of fabrication parameters. Additionally, a serial array consisting of five SFBGs at different wavelengths was successfully constructed. The high-temperature response of these SFBGs was tested and the experimental results showed the SFBGs could withstand a high temperature of 1612 degrees C. Moreover, a temperature sensitivity of 36.5 pm/degrees C was achieved in the high-temperature region. Such SFBGs could be developed for promising high- temperature sensors in aero engines. (C) 2018 Optical Society of America