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

作者：Xu, Le; Han, Weina; Wang, Peng; Wang, Sumei^*

来源：Chinese Optics Letters, 2014, 12(7): 070602.

DOI：10.3788/COL201412.070602

• REFRACTIVE-INDEX SENSOR
• FABRY-PEROT-INTERFEROMETER
• PHOTONIC CRYSTAL FIBER
• MICHELSON INTERFEROMETER
• TEMPERATURE
• GRATINGS
• SENSITIVITY

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 mu m, significant interference signals are detected with a prominent attenuation peak of similar to 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/degrees C in the temperature ranges of 14-250 and 250-1000 degrees C, respectively.

• 出版日期2014-7-10
• 单位北京理工大学