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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Cascaded-cavity Fabry–Perot interferometer for simultaneous measurement of temperature and strain with cross-sensitivity compensation
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Cascaded-cavity Fabry–Perot interferometer for simultaneous measurement of temperature and strain with cross-sensitivity compensation

机译：级联腔法布里 - 珀罗干涉仪，用于同时测量温度和应变，交叉敏感性补偿

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摘要

AbstractWe propose and demonstrate a fiber sensor for simultaneous temperature and strain measurements. The proposed sensor is implemented by a cascaded-cavity Fabry–Perot (FP) fiber interferometer. The two cascaded FP cavities comprise a micro-air-cavity in a hollow-core tube fiber and a micro-silica-cavity in a standard single-mode fiber. To separate the interference spectrum of each FP cavity, the total spectrum is filtered in the frequency domain through band-pass filters, whose central frequencies were predesigned based on the relationship between the spatial frequency and free spectral range of each FP cavity. The different cross-sectional areas and thermal-optic coefficients of the two FP cavities confer different sensitivities to temperature and strain. Both parameters were measured simultaneously by tracking the wavelength shifts in the filtered interference spectra of the FP cavities. Moreover, the temperature–strain cross-sensitivity was compensated by solving a sensitivity-coefficient matrix equation for the two cavities, using the calibrated temperatures and strains. Other advantages of the proposed sensor are simple fabrication and an all-fiber structure. Owing to these properties, the proposed sensor is potentially applicable to real sensing applications.]]>
机译：<！[cdata [ Abstract 我们提出并演示了一种用于同时温度和应变测量的光纤传感器。所提出的传感器由级联 - 腔法布里 - 珀罗（FP）光纤干涉仪实现。两个级联FP腔包括在空心芯管纤维中的微空气腔和标准单模纤维中的微二氧化硅腔。为了分离每个FP腔的干扰谱，通过带通滤波器在频域中过滤总光谱，其基于每个FP腔的空间频率和自由谱范围之间的关系来预测其中心频率。两个FP腔的不同横截面积和热光学系数赋予温度和菌株不同的敏感性。通过跟踪FP腔的滤波干扰光谱中的波长偏移同时测量两个参数。此外，使用校准的温度和菌株来通过求解两个腔的灵敏度系数矩阵方程来补偿温度 - 应变交叉敏感性。所提出的传感器的其他优点是简单的制造和全纤维结构。由于这些属性，所提出的传感器可能适用于真正的传感应用。 ]]>

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