METHOD AND DEVICE FOR PRODUCING AT LEAST ONE FIBRE BRAGG GRATING

摘要

The invention relates to a method and a device for producing at least one fibre Bragg grating (1) in a waveguide (2), wherein the waveguide (2) has at least one core (21) having a first refractive index (n1) and the fibre Bragg grating (1) contains a plurality of spatial regions (10) which each occupy a partial volume of the core (21) and have a second refractive index (n2), wherein the spatial regions (10) are each produced by the action of laser radiation on a partial volume of the core (21), wherein the laser radiation contains a plurality of pulse trains (5) each containing a plurality of individual pulses (51), wherein the time interval between successive individual pulses (51) is smaller than the time interval between successive pulse trains (5) and the time interval between successive individual pulses (51) is chosen between 10 ns and 100 ps or the pulse train has a duration of 50 fs to 50 ps.