摘要
测定了Ｃｅ３＋，Ｅｒ３＋∶ＹＡＧ中Ｃｅ３＋离子的吸收截面．用从能级跃迁速率方程和激光传输方程推出的表达式计算了１６μｍ波长激光的阈值能量（功率）和斜率效率．表明在Ｃｅ３＋，Ｅｒ３＋∶ＹＡＧ中，Ｃｅ３＋对Ｅｒ３＋离子的激光性能影响与激活离子Ｅｒ３＋的浓度、晶棒大小有关．短晶棒或浓度低的晶体加入Ｃｅ３＋可降低Ｅｒ３＋的激光阈值，增加斜率效率．而长晶棒、或Ｅｒ３＋浓度高的晶体加入Ｃｅ３＋反而增加激光阈值，减小斜率效率．
Abstract The absorption cross section of Ce 3+ ions in the Ce 3+ ,Er 3+ ∶YAG crystal has been measured.The laser threshold energy (or power) and laser slope efficiency are calculated using a formula deduced from rate equations on the transitions of energy levels.It is shown that the effect of Ce 3+ ions in Ce 3+ ,Er 3+ ∶YAG on properties of the laser at ～1 6μm wavelength depends upon the active ion concentration and the length of the crystal rod.The effect of Ce 3+ ion is to reduce the laser threshold energy and increase the slope efficiency,when the crystal rod is shorter or the concentration of Er 3+ ion is lower.But when the crystal rod is longer or the concentration of Er 3+ ion is higher,the effect of Ce 3+ ions is on the contrary.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第1期65-68,共4页
Acta Physica Sinica
基金
浙江省自然科学基金
