Er:GSGG晶体的光谱性质分析及激光特性模拟研究

测试和分析了Er:GSGG的吸收光谱和荧光光谱。应用Judd-Ofelt理论计算了Er3+的强度参数、自发辐射跃迁几率、能级寿命、荧光分支比和吸收截面。结果表明, Er3+在4I13/2和4I11/2能级有较长的能级寿命,在966 nm和790 nm处有较大的吸收截面,在2.79 μm处有较大的积分发射截面值,数值模拟了在966 nm泵浦下激光输出特性, 在泵浦速率达到一定值时,有较高的量子效率。结果表明Er:GSGG有望成为2.79 μm波段的理想激光晶体。

Abstract

Absorption and fluorescence spectra of Er:GSGG crystal were measured and investigated. The oscillator strength, spontaneous emission probability, energy level lifetime, emission branching ratio and absorption cross-section of Er3+ transitions were calculated according to the Judd-Ofelt theory. It is found that the crystal has long lifetime at 4I13/2 and 4I11/2, large absorption cross-section at 965 nm and 790 nm, large stimulated emission cross-section at 2.79 μm. Laser output characteristics were simulated numerically with 965 nm pumping, where it has a large quantum efficiency when the pump rate reaches certain value. The results show that the crystal may be a suitable laser material at 2.79 μm wave band.

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黄荔, 郭强, 罗建乔, 王首长, 周健, 吴朝辉. Er:GSGG晶体的光谱性质分析及激光特性模拟研究[J]. 量子电子学报, 2012, 29(1): 45. HUANG Li, GUO Qiang, LUO Jian-qiao, WANG Shou-zhang, ZHOU Jian, WU Zhao-hui. Spectroscopic properties analysis and laser characteristic simulation of Er:GSGG crystal[J]. Chinese Journal of Quantum Electronics, 2012, 29(1): 45.

Er:GSGG晶体的光谱性质分析及激光特性模拟研究

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