A robust cantilever-based push-pull 3-component （3-C） optical fiber accelerometer is proposed and experi- mentally demonstrated. Sensitivity and resonance frequency can be enhanced simultaneously by increasing the n...A robust cantilever-based push-pull 3-component （3-C） optical fiber accelerometer is proposed and experi- mentally demonstrated. Sensitivity and resonance frequency can be enhanced simultaneously by increasing the number of turns of an optical fiber without increasing the accelerometer size at the mass of a certain value. The calibration results show that axis sensitivity is 45 dB （re： 0 dB - 1 rad/g）, with a fluctuation less than 0.9 dB in a frequency bandwidth of 10-450 Hz. The cross sensitivity is approximately 15 dB, with a fluctuation less than 1.2 dB in a frequency bandwidth of 10-450 Hz. The erosstalk reaches up to 30 dB. Fluctuation of the responses of the acceleration sensitivity of different components is less than 0.7 dB over a frequency bandwidth of 10 450 Hz, which proves the good consistency of the 3-C optical fiber aeeelerometer. By usingan all-metal structure is expected to improve the reliability of the designed aceelerometer for long-term use in harsh environments. These desirable features show that the proposed 3-C optical fiber accelerometer is satisfactory for seismic wave monitoringin oil and gas exploration.展开更多
基金supported by the National Natural Science Foundation of China(Nos.41074128and61077059)the Beijing Science and Technology New Star Program(No.2010B055)
文摘A robust cantilever-based push-pull 3-component （3-C） optical fiber accelerometer is proposed and experi- mentally demonstrated. Sensitivity and resonance frequency can be enhanced simultaneously by increasing the number of turns of an optical fiber without increasing the accelerometer size at the mass of a certain value. The calibration results show that axis sensitivity is 45 dB （re： 0 dB - 1 rad/g）, with a fluctuation less than 0.9 dB in a frequency bandwidth of 10-450 Hz. The cross sensitivity is approximately 15 dB, with a fluctuation less than 1.2 dB in a frequency bandwidth of 10-450 Hz. The erosstalk reaches up to 30 dB. Fluctuation of the responses of the acceleration sensitivity of different components is less than 0.7 dB over a frequency bandwidth of 10 450 Hz, which proves the good consistency of the 3-C optical fiber aeeelerometer. By usingan all-metal structure is expected to improve the reliability of the designed aceelerometer for long-term use in harsh environments. These desirable features show that the proposed 3-C optical fiber accelerometer is satisfactory for seismic wave monitoringin oil and gas exploration.
