GLASS Russian patent published in 2010 - IPC C03C3/15 

FIELD: chemistry.

SUBSTANCE: invention relates to optical materials which can be used as optical filters which suppress parasitic modes of monopulse neodymium lasers at λ≈1.06 and 1.34 mcm which propagate perpendicular the axis of the active element. This glass can also be used in protective spectacles which cut off laser radiation at the said wavelengths. Such glass enables to reduce thickness of the optical filter made and increase its cooling efficiency in a laser head, thus increasing the flash rate of the pumping lamp and repetition rate of generation monopulses of neodymium lasers while maintaining high efficiency. On the other hand, the glass enables nearly complete cut off of laser radiation when used in protective spectacles. The glass contains the following, in mol %: 15-29 B₂O₃, 1-5 Al₂O₃, 45-70 GeO₂, 10-25 Sm₂O₃.

EFFECT: making glass with linear coefficient of absorption of light of approximately 30 cm^-1 at λ≈1,06 and 1,34 mcm while maintaining high optical transmission in the region of the absorption band of Nd³⁺ ions.

1 tbl, 1 dwg