Title :
Fiber-Optic Michelson Accelerometer Based on Frequency Modulation
Author :
Tongxin Zhang ; Yuefeng Zhao ; Dongmei Wei ; Jie Pan
Author_Institution :
Shandong Provincial Key Lab. of Opt. & Photonic Device, Shandong Normal Univ., Jinan, China
Abstract :
A high-accuracy fiber-optic Michelson accelerometer based on frequency modulation is demonstrated and a new type of sensing elements is designed in this letter. The interference optical waves are modulated and demodulated. In theory, the sensitivity of the accelerometer goes up with the increase of frequency. The experimental results demonstrate that when the modulation frequency increases from 200 to 800 Hz, the sensitivity increases from 0.188 to 0.751 rad/g and the average error of acceleration measurement is ~1 %.
Keywords :
Michelson interferometers; acceleration measurement; accelerometers; fibre optic sensors; frequency modulation; light interference; optical design techniques; optical fibre testing; optical modulation; acceleration measurement; frequency 200 Hz to 800 Hz; frequency modulation; high-accuracy fiber-optic Michelson accelerometer; interference optical wave demodulation; interference optical wave modulation; optical design; Accelerometers; Force; Frequency modulation; Optical fiber amplifiers; Optical interferometry; Sensitivity; Fiber sensors; fiber Michelson interferometer; fiber testing and measurement;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2355256
