镱、钠共掺的氟化钙晶体在1050nm的可饱和吸收作用  

Saturable absorption of Yb^(3+)/Na^+ codoped CaF_2 crystals at 1050 nm

作　　者：柴路[1] 颜石[1] 薛迎红[1] 刘庆文[1] 葛文琦[1] 王清月[1] 苏良碧[2] 徐晓东[2] 赵广军[2] 徐军[2] 

机构地区：[1]天津大学精密仪器与光电子工程学院,光电信息技术科学教育部重点实验室,天津300072 [2]中国科学院上海光学精密机械研究所,上海201800

出　　处：《物理学报》2008年第5期2966-2970,共5页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2003CB314904,2006CB806002);国家863计划(批准号:2007AA03Z447);国家杰出青年基金(批准号:60425516);国家自然科学基金(批准号:60578024);高等学校博士学科点专项科研基金(批准号:20070056083,20070056073)资助的课题~~

摘　　要：通过在稳定连续波运转的Yb:YAG激光器中插入不同掺杂浓度的新型钠、镱共掺的氟化钙晶体的对比性实验,证明了镱、钠共掺的氟化钙晶体在1050nm具有明显的可饱和吸收作用,从而解释了该晶体作为增益介质在该波段总是趋于自调Q运转的原因.Yb3+离子是该晶体可饱和吸收作用的主要因素,但是共掺入适当的Na离子可以明显改善晶体的调Q效果.优化共掺镱、钠离子的浓度和比例后的氟化钙晶体能够作为1050nm波段激光器的被动Q开关.The saturable absorption of Yb^3＋/Na^＋ codoped CaF2 crystals at 1050nm has been demonstrated by comparative experiments by inserting the novel Yb^3＋, Na^＋： CaF2 crystal with different doping concentrations into a Yb：YAG laser in stable continuous wave operation, which is the cause for the crystals working as the gain material to tend to self-Q-switching at 1050 nm. The results show that the dominative element is Yb^3＋ rather than Na^＋ for saturable absorption action of the crystals. However, the effect of Q-switching by codoping Na^＋ into the CaF2 crystals can be greatly improved so that the Yb^3＋,Na^＋： CaF2 crystals with optimum concentration and doping ratio can be used as a Q-switching element at 1050 nm.

关 键 词：镱、钠共掺氟化钙 可饱和吸收体 调Q 

分 类 号：O436[机械工程—光学工程]