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.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
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~~
