材料科学
电场
光学
折射率
光纤布拉格光栅
栅栏
包层(金属加工)
光电子学
长周期光纤光栅
液晶
光子晶体光纤
光纤传感器
光纤
渐变折射率纤维
物理
量子力学
冶金
波长
作者
Hongkun Yang,Chao Wang,Guangyong Jin,Shiliang Yang,Chao Xin,Hongjie Chen,Zijun Liang
出处
期刊:Applied Optics
[The Optical Society]
日期:2024-06-11
卷期号:63 (19): 5125-5125
摘要
A temperature-insensitive electric field sensor utilizing HF-etched tilted gratings in a high refractive index solution (E 7 liquid crystal) is proposed. The electric field causes a change in the original arrangement of molecules, thereby altering the refractive index of liquid crystals. This study demonstrates that a combination of liquid crystal and HF-etched tilted gratings effectively excites the cladding leakage mode of the tilted grating. Compared to a non-etched tilted fiber Bragg grating, the proposed sensor exhibits higher sensitivity to electric fields. The experimental results show that the electric field sensitivity of a tilted grating with a diameter of 17.7 µm is 0.024 dB/(kV/cm). The influence of external temperature on the electric field sensor of this design is relatively small, only showing a sensitivity of 0.003 dB/°C. This characteristic is very attractive in practical applications such as industry and healthcare.
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