Title :
A High-Frequency Accelerometer Based on Distributed Bragg Reflector Fiber Laser
Author :
Kuanglu Yu ; Chun-Cheung Lai ; Chongqing Wu ; Yao Zhao ; Chao Lu ; Hwa-Yaw Tam
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Hong Kong, China
Abstract :
We propose an optical accelerometer based on distributed Bragg reflector (DBR) fiber laser sensor. The transducer´s vibration reduces the birefringence of the preloaded fiber laser and consequently changes the beat frequency of the two orthogonally polarized lasing modes, thus the frequency can be used to retrieve the acceleration information. The DBR probe is a segment of bare erbium fiber, which has a very high natural frequency of vibration. Experimental results show that sensitivity of 4.810 MHz/g with a dynamic range of 0.01g-5g (where g = 9.8 m/s2 is the gravity of the earth) and natural frequency of ~1.3 kHz can be obtained with this sensing system.
Keywords :
accelerometers; birefringence; distributed Bragg reflector lasers; erbium; fibre lasers; fibre optic sensors; laser modes; measurement by laser beam; vibration measurement; DBR probe; acceleration information; bare erbium fiber; beat frequency; distributed Bragg reflector fiber laser sensor; high-frequency accelerometer; natural frequency; optical accelerometer; orthogonally polarized lasing modes; preloaded fiber laser birefringence; sensing system; sensor sensitivity; transducer vibration; Accelerometers; Distributed Bragg reflectors; Erbium-doped fiber lasers; Frequency measurement; Optical fiber polarization; Optical fiber sensors; DBR laser; Fiber optics sensors; accelerometer; vibration measurements;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2326558
