CAJ | 학술논문

提出一种具有温度自校准功能的光纤折射率（RI）传感器，传感头结构由2段很短的多模光纤（MMF）之间夹熔一段对折射率不敏感的光纤布拉格光栅（FBG）构成，传感头总长度为14mm，FBG可以为折射率测量提供良好的温度校准功能。实验结果证明，该传感器的折射率灵敏度为126nm。其干涉光谱共振波长的温度灵敏度为35．09pm／℃，用于温度校准的FBG的温度灵敏度为11．14pm／℃。相比于普通的折射率传感器，这种具有温度自校准功能的折射率传感器具有良好的实用前景。
제출일충구유온도자교준공능적광섬절사솔（RI）전감기，전감두결구유2단흔단적다모광섬（MMF）지간협용일단대절사솔불민감적광섬포랍격광책（FBG）구성，전감두총장도위14mm，FBG가이위절사솔측량제공량호적온도교준공능。실험결과증명，해전감기적절사솔령민도위126nm。기간섭광보공진파장적온도령민도위35．09pm／℃，용우온도교준적FBG적온도령민도위11．14pm／℃。상비우보통적절사솔전감기，저충구유온도자교준공능적절사솔전감기구유량호적실용전경。
We proposed a type of optical fiber refractive index(RI) sensor with the temperature calibration ability .The sensing head consisted of two very short lengths of multimode fiber (MMF) and a length of refractivity‐insensitive fiber Bragg grating (FBG) fused between them , which had a total length of 14 mm .Here the FBG was used as the temperature calibration component for refractivity measurement .The experimental results show that the RI sensitivity of this sen‐sor is about 126 nm ,the temperature sensitivity of the resonance wavelength is 35 .09 pm/℃ , and the temperature sensitivity of the FBG is 11 .14 pm/℃ .Compared with the general refrac‐tive index sensors ,this sensor with a good temperature calibration ability has better application prospect .