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

Shinji Tanaka, Kiyokazu Yamada, Hideaki Kobayashii, Michio Kadota

研究成果: Article

11 引用 (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

ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
発行部数7 B
出版物ステータスPublished - 2007 7 26

ASJC Scopus subject areas

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

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