ACTIVE ELEMENT FROM NEODYMIUM-DOPED YTTRIUM-ALUMINIUM GARNET, WITH PERIPHERAL ABSORBING LAYER Russian patent published in 2014 - IPC H01S3/06 

FIELD: chemistry.

SUBSTANCE: invention relates to solid-state lasers. Active element from neodymium-doped yttrium-aluminium garnet, (YAG:Nd³⁺), with peripheral absorbing layer is made in form of rod. Element consists of central part from YAG:Nd³⁺ and peripheral layer, transparent in area of waves length of YAG:Nd³⁺ excitation, which ensures absorption on wave length 1064 nm and which has temperature coefficient of linear extension and index of refraction, close to temperature coefficient of linear extension and index of reflection of YAG:Nd³⁺. Peripheral layer is made from fusible glass, which includes in its composition lead oxide PbO, boron oxide B₂O₃, silicon oxide SiO₂, aluminium oxide Al₂O₃, zinc oxide ZnO, samarium oxide Sm₂O₃, with the following component ratio, wt %: PbO 52.3-59.8; B₂O₃ 14.7-16.8; SiO₂ 5.4-6.2; Al₂O₃ 5.1-5.8; ZnO 4.4-5.0; Sm₂O₃ 6.4-18.1.

EFFECT: increasing efficiency of output irradiation generation due to absorption of spontaneous luminescence radiation in peripheral layer and prevention of generation of parasitic modes and development of superluminescence effect.

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