| Title |
Study on Fiber Polarimetric Vibration Sensor Based on Polarization-Maintaining Photonic Crystal Fiber |
| Authors |
Young-Suk Kim ; Kyongsoo Park ; Yong Wook Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2015.29.5.013 |
| Keywords |
Photonic Crystal Fiber ; Vibration Sensor ; Sagnac Interferometer ; Birefringence |
| Abstract |
In this paper, we implemented a polarimetric vibration sensor using a Sagnac birefringence interferometer composed of polarization-maintaining photonic crystal fiber(PM-PCF). By changing the amplitude and frequency of vibration applied to PM-PCF employed as the sensor head of the proposed sensor, sensor responses to various types of vibration were investigated. First, the vibration characteristic of the sensor was explored for a single frequency in a frequency range from 1 to 3000Hz with a cylindrical piezoelectric transducer, and then the sensor response to naturally damped vibration was examined by utilizing a metal cantilever. It was experimentally observed that the sensor output signal was deteriorated by more than 3dB at ∼1900Hz in the single frequency vibration measurement with a minimum detectable strain perturbation of ∼1.34nε/Hz1/2 at 1500Hz and the peak value of the sensor output signal was proportional to the strength of initially applied stress in the naturally damped vibration measurement. |