Radiation Effects on Fiber Bragg Grating Sensors Written in UV KrF Laser Process Condition

UV KrF 레이저 공정조건에 따른 FBG 센서의 방사선 영향

Kim, Jong-Yeol;Lee, Nam-Ho;Jung, Hyun-Kyu

  • Received : 2015.11.06
  • Accepted : 2015.12.14
  • Published : 2016.01.31


We studied the effect of $Co^{60}$ gamma-radiation on the FBGs by a variation of grating the fabrication parameters. The FBGs were fabricated in a different UV KrF laser intensity using the same boron co-doped photo-sensitive fiber and exposed to gamma-radiation up to a dose of 33.8 kGy. According to the experimental data and analysis results, We confirmed that the laser intensity for grating inscription has a highly effect on the radiation sensitivity of the FBGs and the radiation-induced Bragg wavelength shift by the change of laser process condition showed a difference more than about 30 %.


Fiber Bragg gratings;Gamma radiation;Optical fiber sensor;Radiation effect;Photo-sensitive fiber


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Supported by : Ministry of Science, ICT & Future Planning