Abstract: The invention involves a sensor (100) with a Bragg network fiber including a source (105) and detection system (101), operating at a wavelength of a given study, in addition to a Bragg (6) network fiber (1) linked to said source and said system, with said fiber being a microstructured optic fiber whose sheath (5) includes channels (3) adjacent to the heart (2) of the fiber (1), capable of receiving a product to be analyzed, characterized in that the number of channels (3) adjacent to the heart (2) is between 2 and 5, and that the size of the heart (2) of the fiber (1) is adapted so that an electromagnetic field of a wave guided by the fiber is not confined in the heart (2) of the fiber (1), and the electromagnetic field extends into the channels (3).

Abstract: The invention concerns a light transforming material, in particular for greenhouse walls, comprising as additive a barium and magnesium silicate of formula Ba3(1-x)Eu3xMg1-yMnySi2O8, wherein 0<x?0.3 and 0<y?0.3and 0<y=0.3. The material is capable of transforming solar energy of UV range into a red light. The material can also be used in paints and cosmetics.

Abstract: The invention concerns a light transforming material, in particular for greenhouse walls, comprising as additive a barium and magnesium silicate of formula Ba; 3(1-x)Eu; 3xMg; 1-yMn; ySi; 2O; (1), wherein 0<x=0.3 and 0<y=0.3. Said material is capable of transforming solar energy of UV range into a red light. Said material can also be used in paints and cosmetics.