OPTICAL MEDIUM FOR CONVERTING MONOCHROMATIC LASER RADIATION AND METHOD OF MAKING SAID MEDIUM Russian patent published in 2010 - IPC H01S3/10 C30B29/32 

FIELD: physics.

SUBSTANCE: optical medium for converting monochromatic laser radiation with wavelength 975±5 nm to the 1483-1654 nm band is a complex calcium tetragermanate of erbium and yttrium of formula Er_xY_2-xCaGe₄O₁₂, where 0.1<x<0.3. The method of making the said optical medium involves preparation of two initial mixtures of components containing the following in wt %, respectively: calcium carbonate - 11.11; erbium oxide - 42.45; germanium oxide - 46.43 and calcium carbonate - 13.45; yttrium oxide - 30.34; germanium oxide - 56.21. Separate mixing of components of each mixture is carried out in the presence of an alcohol, as well as heating to 700-900°C and maintaining that temperature for 8-10 hours. Repeated heating is carried out to 1050-1100°C, while maintaining that temperature for 100-150 hours and reburdening every 20 hours. Both initial mixtures are then mixed in ratio of 1:4.6-15.3 in the presence of an alcohol and heating to 1050-1100°C and maintaining that temperature for 40-50 hours and reburdening every 10 hours.

EFFECT: possibility of converting monochromatic radiation into a band with simultaneous amplification during operation of the laser in continuous pumping mode.

2 cl, 3 dwg, 2 ex