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Photonic Sensors

, Volume 4, Issue 2, pp 102–107 | Cite as

Fiber optic 3-component seismometer

  • Jing Han
  • Wentao Zhang
  • Dongshan Jiang
  • Zhaogang Wang
  • Fang Li
Open Access
Article

Abstract

An all-metal 3-component optical fiber seismometer was proposed and experimentally demonstrated. The theoretical analysis was given based on the electro-mechanical theory. Calibration results showed that the axis sensitivity was about 41 dB (re: 0 dB=1 rad/g) with a fluctuation ±2 dB in the frequency bandwidth of 5 Hz–400 Hz. A transverse sensitivity of about −40 dB was achieved. The fluctuation of the acceleration sensitivity for the three accelerometers in the seismometer was within ±2.5 dB. The minimum phase demodulation detection accuracy of the phase-generated carrier (PGC) was 10−5 rad/√Hz, and the minimum detectable acceleration was calculated to be 90 ng/√Hz.

Keywords

Fiber optic seismometer transverse sensitivity accelerometer 

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Copyright information

© The Author(s) 2014

This article is published under license to BioMed Central Ltd. Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • Jing Han
    • 1
  • Wentao Zhang
    • 1
  • Dongshan Jiang
    • 1
  • Zhaogang Wang
    • 1
  • Fang Li
    • 1
  1. 1.Optoelectronic System Laboratory, Institute of SemiconductorsChinese Academy of SciencesHai dian District BeijingChina

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