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Spectral characteristics of tapered LPG device as a sensing element for refractive index and temperature

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7 Author(s)
T. Allsop ; Photonics Res. Group, Aston Univ., Birmingham, UK ; F. Floreani ; K. P. Jedrzejewski ; P. V. S. Marques
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The fabrication and characterization of long-period gratings (LPGs) in fiber tapers is presented alongside supporting theory. The devices possess a high sensitivity to the index of aqueous solutions due to an observed spectral bifurcation effect, yielding a limiting index resolution of ±8.5×10-5 for solutions with an index in the range 1.330-1.335.

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Journal of Lightwave Technology  (Volume:24 ,  Issue: 2 )