Proceedings of the Korean Society For Composite Materials Conference (한국복합재료학회:학술대회논문집)

The Korean Society for Composite Materials (한국복합재료학회)
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Signal Characteristics of Fiber Bragg Grating Sensor with Gage Length

광섬유 브래그 격자 센서의 게이지 길이에 따른 신호 특성

  • 강동훈 (한국과학기술원 항공우주공학전공) ;
  • 김대현 (한국과학기술원 항공우주공학전) ;
  • 방형준 (한국과학기술원 항공우주공학전) ;
  • 홍창선 (한국과학기술원 항공우주공학전) ;
  • 김천곤 (한국과학기술원 항공우주공학전공)
  • Published : 2002.10.01
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Abstract

A new fabrication method of FBG sensor with gage length shorter than 10 mm is introduced using the reflection prism with special coating on the surface. It is verified that the bandwidth of FBG sensor increases exponentially as the gage length of it decreases. The transverse stress and strain gradient induced by local stress concentration which occurs during curing has an influence on the FBG sensor with gage length of 2 mm less than that of 10 mm.

Keywords