Method and Device for Producing at Least One Fiber Bragg Grating

Method for producing at least one fiber Bragg grating in a waveguide, wherein the waveguide has at least one core having a first refractive index (n1) and the fiber Bragg grating contains a plurality of spatial regions, each of which occupies a partial volume of the core and has a second refractive index (n2), wherein each of the spatial regions is produced by the exposure of a partial volume of the core to laser radiation, wherein the laser radiation comprises a plurality of pulse trains, each of which comprises a plurality of individual pulses, wherein the time interval between successive individual pulses is shorter than the time interval between successive pulse trains and the time interval between successive individual pulses is chosen to be between 10 ns and 100 ps or the pulse train has a duration of 50 fs to 50 ps.

Method for producing at least one fiber Bragg grating in a waveguide, wherein the waveguide has at least one core having a first refractive index (n1) and the fiber Bragg grating contains a plurality of spatial regions, each of which occupies a partial volume of the core and has a second refractive index (n2), wherein each of the spatial regions is produced by the exposure of a partial volume of the core to laser radiation, wherein the laser radiation comprises a plurality of pulse trains, each of which comprises a plurality of individual pulses, wherein the time interval between successive individual pulses is shorter than the time interval between successive pulse trains and the time interval between successive individual pulses is chosen to be between 10 ns and 100 ps or the pulse train has a duration of 50 fs to 50 ps, wherein the time interval between successive individual pulses is chosen in such a way that individual pulses are absorbed in the material when the latter is still in a phononically or electronically excited state on account of the absorption of a preceding individual pulse.

Device for producing at least one fiber Bragg grating in a waveguide having at least one core by irradiating a plurality of spatial regions of the core using laser radiation, containing

• at least one laser light source which is adapted to produce laser radiation which comprises a plurality of pulse trains, each of which comprises a plurality of individual pulses, wherein the time interval between successive individual pulses is shorter than the time interval between successive pulse trains and the time interval between successive individual pulses can be chosen to be between 10 ns and 100 ps or the pulse train has a duration of 50 fs to 50 ps,
• at least one support apparatus in which the waveguide can be attached and which is adapted to enable a relative movement between waveguide and laser light source.