高效中红外激光晶体Cr,Er,Re:YSGG（Re＝Eu3+, Tb3+）的生长及性能研究

项目名称： 高效中红外激光晶体Cr,Er,Re:YSGG（Re＝Eu3+, Tb3+）的生长及性能研究

项目编号： No.61205173

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 罗建乔

作者单位： 中国科学院合肥物质科学研究院

项目金额： 25万元

中文摘要： 2.7～3微米中红外激光在医疗、生物技术、红外激光雷达和国防安全等领域有着广阔的应用前景，是目前最缺乏和急需的光源波段之一。Er3+离子是产生该波段激光的重要稀土离子，但其激光下能级4I13/2的寿命通常比激光上能级4I11/2长，不利于粒子数反转，因此其连续、高效的中红外激光发射受到了影响。本项目提出在Cr,Er:YSGG中掺入Eu3+、Tb3+等离子，利用Er3+与Eu3+、Tb3+离子之间共振能量传递，加快激光下能级4I13/2的粒子抽空速率，减小其寿命，从而实现2.7～3微米波段高效的中红外激光输出，促进其晶体及激光元件在激光医疗和国防安全等领域中的应用。因此，本项目的研究具有重要的科学意义和实际应用价值。

中文关键词： 退激活；晶体生长；光谱性能；热学性能；激光性能

英文摘要： 2.7-3 μm mid-infrared laser has broad application prospects in the fields of medicine, biotechnology, infrared laser radar and defense security, is one of most scarce and urgent need laser sources. Er3+ ions are important rare earth ions in realizing this waveband laser. However, its lifetime of laser low level 4I13/2 is usually longer than that of the laser upper level 4I11/2, which is unfavorable for the population inversion, so the continuous and efficient mid-infrared laser output has been influenced. In this project, We propose that the Eu3+ or Tb3+ ions are doped into Cr,Er:YSGG crystal, to use the resonance energy transfer between Er3+ and Eu3+ or Tb3+ ions, to speed up the particle evacuating rate of laser lower level 4I13/2 and reduce its lifetime in order to achieve 2.7-3μm laser with high efficiency, to promote the application of the crystal and laser components in laser medicine and defense security. Therefore, this project has important scientific significance and practical value.

英文关键词： Deactivation；Crystal growth；Spectra property；Thermal properties；Laser performance