Temperature and refractive index sensing characteristics of an MZI-based multimode fiber-dispersion compensation fiber-multimode fiber structure

详细信息    查看全文

• 作者：Hao Sun ; Shen Yang ; Jing Zhang ; Qiangzhou Rong ; Lei Liang ; Qinfang Xu ; Guanghua Xiang ; Dingyi Feng ; Yanying Du ; Zhongyao Feng ; Xueguang Qiao ; Manli Hu ; ^{huml@nwu.edu.cn}
• 关键词：Optical fiber sensor ; Temperature ; Refractive index ; Dispersion compensation fiber
• 刊名：Optical Fiber Technology
• 出版年：2012
• 出版时间：December, 2012
• 年：2012
• 卷：18
• 期：6
• 页码：425-429
• 全文大小：469 K

文摘

We proposed an optical fiber sensor with simple multimode fiber (MMF)-dispersion compensation fiber (DCF)-multimode fiber structure based on Mach-Zehnder Interferometer (MZI) and researched its temperature and refractive index (RI) sensing characteristics. The sensing principle is based on the interference between core and cladding modes of DCF due to the large core diameter mismatch. Spectral analyses demonstrate that the transmission spectrum is mainly formed by the interference between the dominant excited cladding mode and core modes. The experimental results show that the proposed sensor has high temperature sensitivity of 0.118 nm/¡ãC in the range of 20-250 ¡ãC and RI sensitivity of 66.32 nm/RIU within the linear sensing range of 1.33-1.39 RIU. Therefore, the characteristics of compact size, low cost, easy fabrication, high sensitivities, and good anti-interference ability make this sensor have extensive application prospects.