Patent ID: 8781265

Claim:
A sensor for measuring forces and moments on an object, comprising: at least one sensor element for the detection of an expansion of the object in at least one spatial direction, from which expansion of a force or a moment can be determined, wherein the sensor element comprises an optical fiber with a sensor region in which a fiber Bragg grating is provided, and said fiber Bragg grating is adapted to be irradiated with light for generating a reflected light having a peak wavelength, wherein the optical fiber is formed by a fiber core and at least one sheath of light-guiding material surrounding the fiber core, and the fiber Bragg grating is arranged in the fiber core, wherein the material of the sheath is doped with a fluorescent material and the fluorescent material is adapted to be irradiated with an excitation radiation to generate a fluorescent radiation having at least one main emission wavelength.