钕激活钙铌镓石榴石激光晶体的生长和性能研究  

Growth and Properties of Nd-activated Calcium Niobium Gallium Garnet Laser Crystals

作　　者：徐观峰[1] 张辉荣[1] 李斌[1] 罗秀英[1] 周蓉[1] 

机构地区：[1]西南技术物理研究所,成都610041

出　　处：《人工晶体学报》2000年第S1期99-,共1页Journal of Synthetic Crystals

摘　　要：钕激活的钙铌镓石榴石 (Nd :CNGG)是一种新型激光晶体 ,该晶体熔点低 ( 1 470℃ ) ,具有无序结构 ,在 80 0nm激光二极管发射波长区有宽吸收带 ,因此该晶体很适合激光二极管泵浦 ,可做成全固态激光二极管泵浦的激光器。本文报导用熔体提拉法在空气中已生长出〈1 1 1〉方向的直径 2 5mm ,长度 80mm以上的钕激活钙铌镓石榴石单晶 ,研究了该晶体的结构和光谱性能 ,同时用 80 0nm激光二极管端面泵浦4mm× 4mm× 2mm的Nd :CNGG片子 ,波长为 1 0 6 2nm的连续激光输出已超过 1 0 0mW ,斜效率超过 2 0 % ,进一步的研究在继续进行之中。With the development of the diode laser pump sources,the Yb 3+ doped crystals have brought much attention which is not suitable for flash light pump source since they are not match in spectrum region.Comparing with Nd 3+ doped crystals,Yb 3+ doped crystals have many advantages,for example, (1)Yb 3+ doped crystals have very low thermal load,(only about 1/3 of that of Nd 3+ doped crystals) therefore,the systems can obtain lasers with higher optical quality and higher average power. (2)The energy stored up ability of Yb 3+ doped crystals is about 5 times as much as that of Nd 3+ doped crystals. (3)The position of main absorption peak of Yb 3+ matches to the pumping InGaAs diode emission,which is more durable than the AlGaAs diode used to pump the Nd 3+ . (4)The full width at half maximum of Yb 3+ doped crystals is 10 times as much as that of Nd 3+ doped crystals,so,the temperature control requirement of laser diode is relatively moderate. (5)From the point of view of energy transfer,because of the inherently small quantum defect of the Yb 3+ ,the theoredtical quantum efficiency can get up to 91%.

关 键 词：掺钕钙铌镓石榴石晶体 激光晶体 引上法晶体生长 

分 类 号：O78[理学—晶体学]