Liao Changrui, Wang Qiao, Xu Lei, Liu Shen, He Jun, Zhao Jing, Li Zhengyong, Wang Yiping
Appl Opt. 2016 Mar 1;55(7):1525-9. doi: 10.1364/AO.55.001525.
The fabrication of fiber Bragg gratings was here demonstrated using ultrashort pulse laser point-by-point inscription. This is a very convenient means of creating fiber Bragg gratings with different grating periods and works by changing the translation speed of the fiber. The laser energy was first optimized in order to improve the spectral properties of the fiber gratings. Then, fiber Bragg gratings were formed into D-shaped fibers for use as refractive index sensors. A nonlinear relationship was observed between the Bragg wavelength and liquid refractive index, and a sensitivity of ∼30 nm/RIU was observed at 1.450. This shows that D-shaped fiber Bragg gratings might be used to develop promising biochemical sensors.
本文展示了利用超短脉冲激光逐点写入法制造光纤布拉格光栅。这是一种制造具有不同光栅周期的光纤布拉格光栅的非常便捷的方法，其工作原理是改变光纤的平移速度。首先对激光能量进行了优化，以改善光纤光栅的光谱特性。然后，将光纤布拉格光栅制作成D形光纤用作折射率传感器。观察到布拉格波长与液体折射率之间存在非线性关系，在1.450时灵敏度约为30 nm/RIU。这表明D形光纤布拉格光栅可用于开发有前景的生化传感器。
