Highly sensitive strain sensor based on PCF-based fiber-inline Mach–Zehnder interferometer
Highly sensitive strain sensor based on PCF-based fiber-inline Mach–Zehnder interferometer
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DOI：
10.35848/1347-4065/ac8a30
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发表时间：
2022-08
影响因子：
1.5
通讯作者：
Ling Li;Xinran Dong;K. Liao;Li Zeng;Xiao-yan Sun
中科院分区：
文献类型：
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作者：
Ling Li;Xinran Dong;K. Liao;Li Zeng;Xiao-yan Sun
提出了一种基于光子晶体光纤(PCF)马赫-曾德尔干涉仪(MZI)的高灵敏度应变传感器。MZI是由两段无芯光纤(NCF)与一块PCF在两根单模光纤之间拼接而成的。该传感器在空气中具有高达22分贝的条纹可见度，在0με−2973∼范围内具有2.09 PMμε1的高应变灵敏度。研究了不同长度光子晶体光纤传感器的应变特性。测得其波长滞后小于0.2 nm，温度灵敏度为11.2 8 pm°C−1。此外，该传感器还具有制作简单、应变测量量大、消光比高、分辨率高等优点，在应变测量领域显示出巨大的潜力。
A highly sensitive strain sensor based on a photonic crystal fiber (PCF) Mach–Zehnder interferometer (MZI) was proposed. The MZI was formed by splicing two sections of no-core fibers (NCFs) with a piece of PCF between two single-mode fibers. The sensor has exhibited high fringe visibility of up to 22 dB in air and high strain sensitivity of 2.09 pm μ ε −1 in the range of 0 ∼ 2973 μ ε. The strain characteristics of the sensor with different lengths of PCF were also investigated. Moreover, a wavelength hysteresis of less than 0.2 nm and temperature sensitivity of 11.28 pm °C−1 were measured. Additionally, the sensor has the advantages of easy fabrication, larger strain measurement, high extinction ratio, and high resolution, which shows great potential in the field of strain measurement.