Thulium-doped and holmium-doped lanthanum calcium lithium niobium garnet crystal and preparation method and application thereof

• Main Authors: CAI HUAQIANG, ZHANG YAN, JU JIA, YUAN HAO, YUAN HUALEI, DAI XIAOJUN, PAN ZHONGBEN
• Format: Patent
• Language: Chinese; English
• Published: 08.01.2019
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; CHEMISTRY; CRYSTAL GROWTH; METALLURGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

The invention discloses a thulium-doped and holmium-doped lanthanum calcium lithium niobium garnet crystal and a preparation method and application thereof. The thulium-doped and holmium-doped lanthanum calcium lithium niobium garnet adopts a chemical formula as follows: Ca2.4La0.6Li1.22Nb1.82Ga2.36O12.xTmyHo(3-y)Ga5O12, wherein x is 0.03-0.1, y is 2.5-3.0, the doping concentration of Tm<3+> is 3-10at.%, and the doping concentration of Ho<3+> is 0-1.67at.%. The invention further discloses the preparation method and application of the crystal. The crystal is prepared by preparing a polycrystalline material by a solid-phase synthesis method, and then growing a Tm,Ho:LCLNGG crystal by a pulling method. The crystal can generate 2-micron ultrashort pulse laser, adopts a disordered crystal structure, has an inhomogeneous broadened spectrum, and facilitates generation of the ultrashort pulse laser by a mode-locking technology more. 本发明公开了种铥、钬双掺杂的镧钙锂铌石榴石晶体、制备方法及其应用，铥、钬双掺杂的镧钙锂铌石榴石具有化学式CaLaLiNbGaO·xTmHoGaO，其中x＝0.03～0.1