Optical fiber having at least one Bragg grating obtained by writing directly through the coating covering the cladding

摘要

An optical fiber ( 1 ') having at least one Bragg grating ( 11 ), the fiber comprising a core ( 2 ) surrounded successively by cladding ( 3 ) and by a coating ( 4 ), the grating being obtained by being written directly in the core and/or the cladding of the fiber through the coating which is made of a material that is substantially transparent to ultraviolet type radiation used for writing the grating, and wherein the material of the coating contains a first polymer network interpenetrated by a second polymer.