论文部分内容阅读
利用自制的双芯光子晶体光纤(D-PCF)与单模光纤(SMF)熔接,并在熔接点塌陷空气孔,提出了一种新型的D-PCF马赫-曾德干涉仪(MZI)。利用图像提取法和有限元方法,分析并计算了实际拉制出的D-PCF支持的光纤模式。经过分析发现,这种新型光纤干涉仪的主要干涉模式是环芯模式,不同于传统光纤干涉仪的干涉模式。实验观测了D-PCF长度及第1个完全塌陷区长度对干涉仪周期、传输谱及空间频率谱的影响。并对D-PCF MZI的应力特性进行了实验研究。结果表明,干涉仪的波长位移与应力呈良好的线性关系,线性度为
A new type of D-PCF Mach-Zehnder Interferometer (MZI) was proposed by using self-made double-core photonic crystal fiber (D-PCF) and single mode fiber (SMF) to fuse and collapse air holes at the fusion point. Using the image extraction method and the finite element method, the fiber modes supported by the D-PCF actually drawn are analyzed and calculated. After analysis, it is found that the main interference mode of the new type of optical fiber interferometer is the ring core mode, which is different from the interference mode of the conventional optical fiber interferometer. The effects of D-PCF length and the length of the first fully collapsed zone on the period, transmission spectrum and spatial frequency spectrum of the interferometer were observed experimentally. The stress characteristics of D-PCF MZI were studied experimentally. The results show that the wavelength of the interferometer has a good linear relationship with the stress and the linearity is