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Highly sensitive curvature sensor based on a multicladding fiber sandwiched dual no-core fibers structure

机译:基于多包层纤维夹层双无芯纤维结构的高灵敏度曲率传感器

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摘要

In this paper, we present a simple, compact, and highly sensitive optical fiber curvature sensor. It consists of dual no-core fibers for coupling energy from the lead-in single-mode fiber (SMF), and recoupling the energy into the lead-out SMF. The sensing section is constituted by multicladding fiber with a length of 5 cm. In the experiment, the spectrum shows a blueshift, and the energy corresponding to the resonant wavelength shows a cosine series with a bending of the sensing segment. The curvature sensitivity around the wavelength of 1550 nm shows -39.02 nm/m~(-1) within the curvature range from 0.3 to 2.14 m~(-1). The temperature sensitivity is 78.2 pm/℃ in the temperature range of 10℃-60℃. It implies the possibility of temperature measurement.
机译:在本文中,我们提出了一种简单,紧凑且高度灵敏的光纤曲率传感器。它由双无芯光纤组成,用于耦合来自引入单模光纤(SMF)的能量,并将能量重新耦合到引入SMF中。感测部分由长度为5 cm的多层光纤组成。在实验中,光谱显示出蓝移,与共振波长相对应的能量显示出具有感测段弯曲的余弦序列。在0.350〜2.14 m〜(-1)的曲率范围内,波长为1550 nm附近的曲率灵敏度为-39.02 nm / m〜(-1)。在10℃-60℃的温度范围内,温度灵敏度为78.2 pm /℃。这暗示了进行温度测量的可能性。

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