METHOD OF LOCAL CRYSTALLIZATION OF GLASSES Russian patent published in 2018 - IPC C03B32/02 C03C10/02 C03C3/15 

FIELD: chemistry.

SUBSTANCE: local crystallization of glasses lanthanum-boron-germanate system, doped with neodymium, is carried out with a pulsed femtosecond laser moving relative to the glass at a speed of 10-50 mm/s at a depth of 100 mcm. The frequency of the femtosecond pulses is set at 25-100 kHz, and the average power is within the range of 0.1-1.2 W. The glass of the following composition is used, moll. %: La₂O₃ 14.9-26, B₂O₃ 23-26, GeO₂ 49-52, Nd₂O₃ 0.1-10.

EFFECT: obtaining homogeneous crystal lines with neodymium ions embedded in the crystal lattice in the glass volume.

5 dwg, 3 ex