All-fiber asymmetrical interferometric sensor for simultaneous dual-parameter measurements

Benye Li, Sumei Wang*, Peng Wang, Shufeng Ni, Kai Gao, Wenhua Li

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

2 引用 (Scopus)

摘要

An inline fiber sensor is proposed for simultaneously measure refractive index (RI) and axial strain or temperature and axial strain. The proposed sensor consists of a microcavity and a fiber core-offset attenuator. The microcavity with the diameter of 6μm and the depth of 2.5 μm is embedded in the fiber core fabricated by a femtosecond laser. High quality interference spectra with a fringe visibility around 20 dB are observed. For attenuation peak wavelengths at 1496.68 nm and 1533.18 nm, the RI sensitivities are -29.91 nm/RIU and -16.72 nm/RIU, the strain sensitivities are -1.55 pm/με and -0.31 pm/με, respectively. The experimental results demonstrate that the sensor is able to achieve simultaneous measurements of refractive index and axial-strain or temperature by sensitivity matrix.

源语言英语
页(从-至)1-6
页数6
期刊Guangxue Jishu/Optical Technique
40
1
出版状态已出版 - 1月 2014

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