摘要
在以中频感应提拉法生长Cr，Ca∶Y3Al5O12晶体的基础上，根据不同Ca／Cr掺杂浓度比的晶体于空气中退火前后的吸收光谱数据，建立了四配位四价Cr激光中心形成的缺陷反应方程，认为Cr3+到Cr4+的价态转变与晶体中带有两个而不是一个正电荷的氧离子空位有关。
In the light of annealing data about Cr,Ca:Y3Al5O12 crystals with various Ca/Cr content ratios, we established a set of solid-state defect reaction formulas describing the formation of the four-coordinated quadra-valence Cr4+ laser center in the crystal. The valence state of the Cr4+ laser center depends mainly on the divalent Ca2+ compensation ion in the crystal, which can introduce an oxygen vacancy into the crystal. The concentration of the Cr4+ laser center has also been estimated and indicated that its absorption cross-section at 1064 nm wavelength is most probably 5.7 ×10-18 cm2.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1999年第11期1036-1040,共5页
Chinese Journal of Lasers
基金
国家博士后基金
中国科学院基金
关键词
CR
Ca:Y3Al5O12
四配位
四价
晶体生长
Cr, Ca: Y_3Al_5O_(12) crystal, four- coordinated Cr^(4+) laser center, formation mechanism of Cr_(4+) laser center
