材料科学
光学
光纤布拉格光栅
飞秒
磷
蓝宝石
激光器
栅栏
光子晶体光纤
光电子学
波长
制作
纤维
光纤传感器
色散位移光纤
物理
病理
复合材料
替代医学
医学
作者
Xizhen Xu,Jun He,Changrui Liao,Kaiming Yang,Kuikui Guo,Chi Li,Yunfang Zhang,Zhengbiao Ouyang,Yiping Wang
出处
期刊:Optics Letters
[The Optical Society]
日期:2018-09-17
卷期号:43 (19): 4562-4562
被引量:53
摘要
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°C. Moreover, a temperature sensitivity of 36.5 pm/°C was achieved in the high-temperature region. Such SFBGs could be developed for promising high-temperature sensors in aero engines.
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