折射率
光学
熔接
光纤传感器
材料科学
多模光纤
温度测量
萨格纳克效应
渐变折射率纤维
光纤陀螺
光纤
物理
量子力学
作者
Hanglin Lu,Yaoli Yue,Jing Du,Laipeng Shao,Tianyin Wu,Jiao Pan,Junhui Hu
出处
期刊:Optics Express
[The Optical Society]
日期:2018-07-10
卷期号:26 (15): 18920-18920
被引量:47
摘要
A cost-efficient P-D fiber structure-based Sagnac loop sensor is proposed and experimentally demonstrated for measuring temperature and liquid refractive index (RI). The P-D structure is fabricated by fusion splicing a section of polarization-maintaining fiber (PMF) to a piece of multimode D-shaped optical fiber (MMDF). Then the P-D structure is built into a Sagnac loop using a 3dB coupler. The temperature and RI characteristics of the sensor are investigated experimentally. The results show that two resonant dips have different spectral responses of temperature and RI, which indicate that the sensor can realize simultaneous temperature and RI measurement. The high sensitivities of -1.804nm/°C and -131.49nm/RIU are achieved. The obtained resolutions of temperature and RI of the proposed sensor can reach 0.01°C and 2.46 × 10-4RIU, respectively. The proposed sensor has the potential application in biological and chemical fields.
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