中文摘要：

为研究基于全固光子带隙光纤（AS-PBF）传感器的特性,使用熔接机在一根AS-PBF上间隔一段距离制作两个锥形光纤,制备出一种基于双锥型模式干涉的特种光纤传感器。与传统单模光纤或折射率传导的光子晶体相比,AS-PBF的纤芯有效折射率较低,而包层有效折射率较高。通过理论分析和实验验证,研究了这种光纤结构对温度和轴向应力的响应。实验结果表明：温度和轴向应力灵敏度分别约为0.063 nm/℃和-1.74 nm/N。与长周期光栅、布拉格光栅相比,基于全固带隙光纤的双锥型模式干涉传感器具有结构紧凑、制备简单等优势,在光纤传感领域具有广泛的应用前景。

英文摘要：

In order to investigate characteristics of sensors based on all-solid-state photonic bandgap fiber（AS-PBF）,a special optical fiber laser based on two-taper mode interference is prepared by fabricating two taper fibers in an AS-PBF on an interval with a splicer.Compared to the conventional single mode fibers or index-guiding photonic crystals,AS-PBP has a lower effective index in the core and a higher effective index in the cladding.According to the theoretical analysis and experimental verification,the temperature and axial stress response of the structure are investigated.Results show that the measured sensing sensitivities are about 0.063 nm/℃ for temperarure and-1.74 nm/N for the axial stress,respectively.Compared with the long-period grating and Bragg grating,a two-tapers modal interferometer based on all-solid photonic bandgap fiber has a much compact device size and a simple fabrication,and it has wide application prospects in the filed of optical fiber sensing.