优质大尺寸金绿宝石(Cr^(3+):BeAl_2O_4)可调谐激光晶体的生长  

Growth of high quality and big size Cr^(3+):BeAl_2O_4 tunable laser crystal

作　　者：夏海平[1] 徐铁峰[1] 张新民[1] 张约品[1] 王金浩[1] 章践立[1] 

机构地区：[1]宁波大学光电子功能材料重点实验室,浙江宁波315211

出　　处：《激光杂志》2008年第5期24-25,共2页Laser Journal

基　　金：浙江省科技厅(2007C21121);宁波市科技局(2007B10053);宁波市重点实验室开放基金(2007A22010)项目资助

摘　　要：应用改进工艺的提拉(CZ)法技术,采用合适的化学组分配比和二次化料过程,选用约60℃的固液界面温度梯度与1mm/h生长速度等工艺参量,成功地生长出了Cr3+离子掺杂、无气泡、无云层和核心、长度与厚度约110×25mm的紫翠色Cr3+:BeAl2O4晶体。测定了晶体的吸收光谱,根据获得的吸收光谱与晶体分裂场理论,计算了Cr3+的八面体晶格场参数Dq=1764cm-1以及Racah参数B=608cm-1。晶体样品加工成6(60、80)mm的激光棒,并实现了激光的输出。The high quality Cr^3＋：BeAl2O4 crystals in the length and thickness of ～110×25mm without bubble,cloud and cores have been grown by Czochralski（CZ） technique under the improved technical conditions of choosing proper raw chemical compositions in molar ratio,taking twice melting processes of the raw materials and using ～60℃ temperature gradient of solid-liquid interface and 1 mm/h growth rate.The strength of the octahedral crystal field,Dq=1764 cm1,and the Racah parameter B=608 cm^-1 were calculated according to the crystal splitting theory and the absoption bands. The crystals were processeded to φ6{60, 80）mm laser rods and the output laser was realized based on the laser rods.

关 键 词：Cr^3+:BeAl2O4晶体 提拉法 晶格场参数 

分 类 号：TB381[一般工业技术—材料科学与工程]