All fiber M-Z interferometer for high temperature sensing based on a hetero-structured cladding solid-core photonic bandgap fiber

作者：Hu, Xiongwei; Shen, Xiang; Wu, Jianjun; Peng, Jinggang; Yang, Lvyun; Li, Jinyan; Li, Haiqin; Dai, Nengli^*

来源：Optics Express, 2016, 24(19): 21693-21699.

DOI：10.1364/OE.24.021693

• MACH-ZEHNDER INTERFEROMETER
• FABRY-PEROT-INTERFEROMETER
• OPTICAL-FIBER
• CRYSTAL FIBER
• HIGH-SENSITIVITY
• LATERAL-OFFSET
• SENSOR
• GRATINGS
• INTERFERENCE
• RESONANCES

We proposed and experimentally demonstrated a high temperature fiber sensor using a hetero-structured cladding solid-core photonic bandgap fiber (HCSC-PBGF) for the first time to our knowledge. A hetero-structured cladding solid-core photonic bandgap fiber is designed and fabricated that supports vibrant core mode and cladding mode transmission. Then, an all fiber M-Z interference sensor is constructed by splicing single mode fiber at both ends of HCSC-PBGF without any other micromachining. The transmission characteristics of HCSC-PBGF are analyzed with a full-vector beam propagation method and a full-vector finite element method, and the simulation results are consistent with experiment results. The sensitivity of this fiber sensor is as high as 0.09 nm/degrees C when operating from room temperature to 1000 degrees C, and the fringe contrast keeps stable and clear. It is obvious that this all fiber sensor will have great application prospects in fiber sensing with the advantages of a compact structure, high sensitivity, and cost-effectiveness.

• 出版日期2016-9-19
• 单位华中科技大学