包层模式
长周期光纤光栅
材料科学
光学
包层(金属加工)
折射率
光纤
芯(光纤)
栅栏
光纤传感器
光电子学
渐变折射率纤维
保偏光纤
物理
冶金
作者
Jianming Zhang,Shengli Pu,Jie Rao,Tianyu Yao
标识
DOI:10.1080/09500340.2018.1424360
摘要
A kind of compact fibre-optic sensor based on no-core fibre (NCF) cascaded with a strong coupling long-period fibre grating (LPFG) is proposed and experimentally demonstrated. The sensing mechanism is based on the Mach–Zehnder-like interference between the core fundamental mode and cladding mode of the fibre structure. The NCF and LPFG are used as the mode exciter and combiner, respectively. Due to the particular properties of the strong coupling LPFG, the measurements of refractive index (RI) and temperature with high sensitivity are realized by monitoring the transmission spectrum with intensity and wavelength interrogation techniques, respectively. The achieved RI sensitivity reaches −580.269 dB/RIU in the range of 1.436–1.454 and the temperature sensitivity reaches 27.2 pm/°C.
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