Application of acoustooptic tunable filter to strain- Or vibration-sensing system

Shinji Tanaka, Kiyokazu Yamada, Hideaki Kobayashii, Michio Kadota

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Various optical spectrum analyzers have been used as strain-sensing equipment in fiber-optic sensing system based on fiber Bragg gratings (FBGs), which has been expected and investigated to monitor the safety of buildings, bridges, road slopes and other structures. An acoustooptic tunable filter (AOTF) with surface acoustic waves (SAWs) on LiNbO3 has been applied to a wavelength monitor as a simple spectrum analyzer in the system, because it has the characteristics of a small size, a simple configuration, fast response, and low cost. It has not been experimentally varified whether the wavelength monitor consisting of an AOTF device can be used as the strain-sensing system. To check the performance, the fabricated wavelength monitor with the AOTF device has been tested in the fiber-optic strain-sensing system using FBGs. As a result, the shift in the Bragg reflection wavelength corresponding to the change in strain at the fiber sensor has been detected for the first time by an AOTF device. The accuracy of the measured wavelength was approximately 0.9 pm at room temperature

Original languageEnglish
Pages (from-to)4633-4635
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number7 B
Publication statusPublished - 2007 Jul 26
Externally publishedYes


  • Acoustooptic tunable filter
  • LiNbO
  • Strain-sensing
  • Surface acoustic wave
  • Wavelength monitor

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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