摘要
研究了Er掺杂和Er/Yb双掺杂的锆钛酸铅(PLZT)光电陶瓷的上转换发光特性,观测到Er掺杂的PLZT样品在540,566nm附近的绿色发光峰,且随着掺杂浓度的增大而增强;Er/Yb双掺杂的PLZT样品除540,566nm附近处的绿色发光峰外,还有一个较弱的668nm的红色发光峰。另外,上转换发光强度与激发强度的对数关系曲线表明样品的绿光发射和红光发射皆为双光子过程,并且利用喇曼光谱进一步分析讨论了其上转换发光的机制。实验和理论分析表明该材料有望制成电光调Q的双功能上转换激光器件。
In the past few years, ceramic laser materials have emerged with many advantages, such as lower cost fabrication, high melting temperature and large size samples more easily to be manufactured, as compared to crystals and glasses. There has been remarkable interest in rare-earth-doped ferroelectric ceramics which are suitable material for novel integrated-optic devices formed by a combination of lasers/amplifier with electrooptic （EO） and nonlinear-optic waveguide components： Recently, a new highly transparent, electro-optic ceramic material, Er^3＋ and Er^3 ＋/Yb^3＋ ions doped Pb1-xLaxZryTi1-yO3 （PLZT）, have been fabricated, which have exceptionally high electro-optic （EO） effect.
The up-conversion luminescence of Er^3＋ and Er^3 ＋/Yb^3＋ ions doped PLZT for active electro-optical applications has been investigated. The green light of 540 nm and 566 nm can be observed in Er^3＋ doped PLZT. Moreover, their intensity gets stronger along with concentration of Er^3＋ .In Er^3 ＋/Yb^3＋ co-doped PLZT, besides the green light of 540 nm and 566 rim, a relatively weak red light of 668 nm can also be observed.
To all sample, the nonlinear curves fitting to the relationship between up-conversion intensity and excitation intensity were made, which were concluded that both red emission and green emission were the absorption process of double-photon. And again the character of up-conversion luminescence was discussed using the Raman spectra of PLZT. The theory and experimentation both show Er^3＋ and Er^3＋/Yb^3＋ ions doped PLZT, based on its large electro-optical effect, have a prospect to be applied for electro-optic Q-switched doublefunction up-conversion laser device.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2007年第1期62-66,共5页
Chinese Journal of Luminescence
基金
国家自然科学基金资助项目(90201013)
关键词
上转换发光
光电陶瓷PLZT
Er离子和Yb离子
up-conversion luminescence
electro-optic ceramic PLZT
rare earth ions of Er^3 ＋ and Yb^3＋
