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Passive Temperature-Compensating Technique for Microstructured Fiber Bragg Gratings

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7 Author(s)
Huy, M.C.P. ; Centre d''Etude de Saclay, Commissariat a l''Energie Atomique, Gif-sur-Yvette ; Laffonta, G. ; Dewynter, V. ; Ferdinand, P.
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The thermal drift of the characteristic wavelength of fiber Bragg gratings (FBGs) photowritten in the core of microstructured fibers (MOFs) is significantly reduced by inserting a liquid of suitable refractive index into their holes. For instance, the spectral range of variations is divided by a factor of 4 over a temperature range larger than 20degC in a six-hole MOF, and the maximum sensitivity is reduced. Such passive FBG temperature compensation technique is of great interest for applications involving accurate sensing free of thermal effects.

Published in:

Sensors Journal, IEEE  (Volume:8 ,  Issue: 7 )