Refractive index and temperature sensors based on no-core fiber cascaded with long period fiber grating

被引：23

作者：

Zhang, Jianming ^{[1
]}

Pu, Shengli ^{[1
,2
]}

Rao, Jie ^{[1
]}

Yao, Tianjun ^{[1
]}

机构：

[1] Univ Shanghai Sci & Technol, Coll Sci, Shanghai, Peoples R China

[2] Univ Shanghai Sci & Technol, Shanghai Key Lab Modern Opt Syst, Shanghai, Peoples R China

来源：

JOURNAL OF MODERN OPTICS | 2018年 / 65卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Fibre-optic sensing; long-period fibre grating; no-core fibre; refractive index sensor; temperature sensor; MAGNETIC FLUID; SENSITIVITY; RESOLUTION; RESONANCE; COMPACT; LASER; TAPER;

D O I：

10.1080/09500340.2018.1424360

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

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 -580.269dB/RIU in the range of 1.436-1.454 and the temperature sensitivity reaches 27.2pm/degrees C.

引用

页码：1098 / 1103

页数：6

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