Heating condition setting method, fiber Bragg grating manufacturing method, and fiber laser system manufacturing method

摘要

A heating condition setting method capable of suppressing a temperature rise of a fiber Bragg grating that may occur during actual use is realized. Based on the correspondence γ(Ed) between the temperature coefficient γ and the relaxation energy Ed in the fiber Bragg grating, a step of specifying the lower limit value Edmin of the relaxation energy Ed at which the temperature coefficient γ is equal to or lower than a desired upper limit value γmax (S11). ) And a step (S12) of setting a heating condition (T, t) when the fiber Bragg grating is thermally aged so that the relaxation energy Ed becomes equal to or more than the lower limit value Edmin.