High Sensitivity Vibration Sensor Based on Polarization Maintaining Micro Fiber
- Resource Type
- article
- Authors
- ZHU Xiaojun; LIU Wen; SUN Dan; WU Wanduo; ZHANG Guoan
- Source
- Nantong Daxue xuebao. Ziran kexue ban, Vol 20, Iss 3, Pp 88-94 (2021)
- Subject
- microfiber-assisted mach-zehnderinterferometer
polarizationmaintaining fiber
sensitivity
vibration sensor
Technology
- Language
- English
Chinese
- ISSN
- 1673-2340
A high sensitivity vibration sensor based on polarization-maintaining microfiber Mach-Zehnder interferometer(MMZI) is studied. By using the fused taper technology, the polarization-maintaining fiber is tapered into a polarization-maintaining-non-polarization-maintaining structure to form a MMZI with multi-channel comb filtering characteristics. The MMZI and fiber Bragg grating are used to form a sensing structure to measure the vibration signal.The experimental results show that the sensitivity of the sensor can reach 35.47 mV/Pa in the low frequency range, and the minimum detection pressure is 171.7 mPa·Hz~(-1/2). The sensor has good vibration detection ability and stability,which lays a good theoretical and experimental foundation for the detection of vibration signals and the preparation of high sensitivity vibration sensors.