Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Length Effects of Hetero-Core Optical Biosensor based on Evanescent Field Absorption

  • Shim, Joon-Hwon (Division of Computer, Control and Electronic Communications Engineering, Korea Maritime University) ;
  • Chan, Joo-Kwong (Division of Computer, Control and Electronic Communications Engineering, Korea Maritime University) ;
  • Sohn, Kyung-Rak (Division of Computer, Control and Electronic Communications Engineering, Korea Maritime University)
  • Published : 2008.12.31
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Abstract

Sensing performances of evanescent field absorption (EFA) hetero-core fiber sensor has been presented based on EFA by changing the length and the core diameter of the single mode fiber. Experimental results have demonstrated a good feature in their relationship between the length and the core diameter of the single mode fiber. The sensor consists of 2 fiber optics which have the same cladding diameter of $125{\mu}m$ However one fiber optic used is single mode and has varying core diameter ranging from 3.3 to $5.6{\mu}m$. The other fiber is multimode type and has a thicker fixed core diameter of $62.5{\mu}m$. The 2 fiber optics are thermally spliced together. Experiments conducted to measure the resonance wavelength were carried out over a range of refractive index, to find the optimum sensing length Experiments show that core diameter of the single mode fiber and sensing length offects the linearity and sensitivity.

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References

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