Hybrid Mach-Zehnder interferometric sensor based on two core-offset attenuators and an abrupt taper

• 作 者: 徐乐 韩伟娜 王鹏 王素梅
• 机 构: Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering,Beijing Institute of Techn
• 出 处: Chinese Optics Letters
• 发表日期: 2014年07期
• 关键词: offset abrupt attenuation refractive cladding tunable fitting interferometer Wav

This study proposes a new hybrid Mach-Zehnder interferometric(MZI) sensor based on two core-offset attenuators and an abrupt taper in a single-mode fiber fabricated by a fiber-taper machine and electric arc discharge. When the distance between the two core-offset attenuators is stretched to 4500 μm, significant interference signals are detected with a prominent attenuation peak of ～28 dB. The proposed MZI can be used to measure temperature due to its low refractive index(RI) and strain cross-sensitivity. The temperature sensitivity is 34.95±0.04 and 106.70±0.04 pm/℃ in the temperature ranges of 14-250 and250-1000 ℃, respectively.

This study proposes a new hybrid Mach-Zehnder interferometric (MZI) sensor based on two core-offset attenuators and an abrupt taper in a single-mode fiber fabricated by a fiber-taper machine and electric arc discharge. When the distance between the two core The proposed MZI can be used to measure temperature due to its low refractive index (RI) and strain cross-sensitivity. The temperature at which the interferometer is stretched to 4500 μm, the significant interference signals are detected with a prominent attenuation peak of ~ 28 dB. sensitivity is 34.95 ± 0.04 and 106.70 ± 0.04 pm / ° C in the temperature ranges of 14-250 and 250-1000 ° C, respectively.