METHOD FOR TENSIONING BRAGG FIBER GRATING TO GIVEN VALUE OF RELATIVE ELONGATION Russian patent published in 2021 - IPC G01D5/353 G02B6/34 G01L1/24 

FIELD: measuring technology.

SUBSTANCE: invention relates to measuring technology, namely to the study and creation of sensitive elements of spectral sensors and transducers of physical quantities. On the elastic element in the form of a beam, made of a material with a positive value of the temperature coefficient of expansion, an additional structural element is fixed - a temperature-sensitive element made of a material with a negative value of the temperature coefficient of expansion. The assembly is heated to a predetermined temperature. The Bragg fiber grating is fixed to a thermosensitive element made of a material with a negative temperature coefficient of expansion using an anchoring material. The assembly is cooled. By means of temperature elongation of the temperature sensitive element during its cooling, the Bragg fiber grating is stretched to a predetermined value of the relative elongation.

EFFECT: expanding the arsenal of methods for tensioning the Bragg fiber grating to a given value of the relative elongation.

1 cl, 1 dwg