Optical heterodyne micro-vibration detection based on all-fiber acousto-optic superlattice modulation

Wending Zhang, Zhen Chen, Biqiang Jiang, Ligang Huang, Dong Mao, Feng Gao, Ting Mei, Dexing Yang, Lin Zhang, Jianlin Zhao

Research output: Contribution to journalArticle

Abstract

We propose a configuration of optical heterodyne micro-vibration detection based on an all-fiber acousto-optic superlattic modulation structure that acts as both frequency shifter and reflector, simultaneously. The vibration information within the frequency range between 1 Hz to 150 kHz of a piezoelectric mirror (PZM) has been experimentally measured by using this all-fiber optical heterodyne detection configuration. The minimal measurable vibration amplitude and the resolution are around 0.013 nm and 10 pm in the region of tens to hundreds of kilohertz, respectively. The configuration not only has advantages of compact size, easy alignment and non-contact measurement, but also gains high accuracy, which provides a promising alternative and could be applied in the compact and portable instruments based on optical heterodyne detection.

Original languageEnglish
JournalJournal of Lightwave Technology
Volumein press
Early online date22 Jun 2017
DOIs
Publication statusE-pub ahead of print - 22 Jun 2017

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Keywords

  • acousto-optic frequency shifter
  • acousto-optic superlattice modulation
  • fiber gratings
  • micro-vibration
  • optical heterodyne detection
  • optical mixing
  • optical reflection
  • optical superlattices
  • optical variables measurement
  • vibrations

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