| Autor: |
Phan Huy, Minh Châu, Laffont, Guillaume, Dewynter, Véronique, Ferdinand, Pierre, Roy, Philippe, Auguste, Jean-Louis, Pagnoux, Dominique, Blanc, Wilfried, Dussardier, Bernard |
| Zdroj: |
Optics Letters; August 2007, Vol. 32 Issue: 16 p2390-2392, 3p |
| Abstrakt: |
We present a photosensitive three-hole microstructured optical fiber specifically designed to improve the refractive index sensitivity of a standard fiber Bragg grating (FBG) sensor photowritten in the suspended Ge-doped silica core. We describe the specific photowriting procedure used to realize gratings in such a fiber. We then determine their spectral sensitivity to the refractive index changes of material filling the holes surrounding the core. The sensitivity is compared with that of standard FBGs photowritten in a six-hole fiber with a larger core diameter. We demonstrate an improvement in the sensitivity by two orders of magnitude and reach a resolution of 3×10^−5 and 6×10^−6 around mean refractive index values of 1.33 and 1.40, respectively. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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