| abstract |
A Bragg grating fiber sensor (100) includes a source (105) and a detection system (101) operating at a given study wavelength, and a fiber (1) for Bragg grating (6) connected to said source and said system, said fiber being a microstructured optical fiber whose sheath (5) comprises channels (3) adjacent to the core (2) of the fiber (1), able to receive a product to be analyzed, characterized in that the number of channels (3) adjacent to the core (2) is between 2 and 5, and in that the diameter of the core (2) of the fiber (1) is adapted so that an electromagnetic field of a wave guided by the fiber is not confined in the core (2) of the fiber (1), the electromagnetic field extending in the channels (3). |