光学
栅栏
折射率
材料科学
长周期光纤光栅
衰减
光纤布拉格光栅
超声波光栅
极化(电化学)
衍射光栅
闪耀光栅
光纤传感器
光纤
光电子学
渐变折射率纤维
物理
化学
物理化学
作者
Fangcheng Shen,Changle Wang,Zhongyuan Sun,Kaiming Zhou,Lin Zhang,Xuewen Shu
出处
期刊:Optics Letters
[The Optical Society]
日期:2017-01-05
卷期号:42 (2): 199-199
被引量:62
摘要
We UV inscribe and characterize a long-period fiber grating with a period of 25 μm. A series of polarization-dependent dual-peak pairs can be seen in the transmission spectrum, even though only the symmetrical refractive index modification is introduced. The fabricated grating exhibits a lower temperature sensitivity compared with standard long-period gratings and an enhanced refractive index sensitivity of ∼312.5 nm/RIU averaged from 1.315 to 1.395, which is more than four-fold higher than standard long-period gratings in this range. The full width at half-maximum of the fabricated grating is only about 0.6 nm, allowing for high-resolution sensing. Moreover, the grating period is so small that the attenuation dip corresponding to a high-order Bragg resonance can also be seen, which can act as a monitor of the unwanted perturbation to realize dual-parameter sensing.
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