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

Volume

26

Issue

14

fYear

2014

fDate

15-Jul-14

Firstpage

1418

Lastpage

1421

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2326558

Filename

6824791