Spectroscopic investigations and luminescence spectra of Nd3+ and Dy3+ doped different phosphate glasses

被引：39
|
作者：
Seshadri, M. [1 ]
Rao, K. Venkata [1 ]
Rao, J. Lakshmana [1 ]
Rao, K. S. R. Koteswara [1 ,2 ]
Ratnakaram, Y. C. [1 ]
机构：
[1] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India
[2] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India
来源：
JOURNAL OF LUMINESCENCE | 2010年 / 130卷 / 04期
关键词：
Rare-earth ions; Absorption spectrum; Transition probability; Lifetime; Emission cross-section; UP-CONVERSION; OPTICAL-ABSORPTION; INTENSITIES;
D O I：
10.1016/j.jlumin.2009.10.027
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Spectral properties of Nd3+ and Dy3+ ions in different phosphate glasses were studied and several spectroscopic parameters were reported. Covalency of rare-earth-oxygen bond was studied in these phosphate glass matrices with the variation of modifier in host glass matrix Using Judd-Ofelt intensity parameters (Omega(2), Omega(4) and Omega(6)), radiative transition probabilities (A) and radiative lifetimes (tau(R)) of certain excited states of Nd3+ and Dy3+ ions are estimated in these glass matrices. From the magnitudes of branching ratios (beta(R)) and integrated absorption cross-sections (Sigma), certain transitions of both the ions are identified for laser excitation. From the emission spectra, peak stimulated emission cross-sections (sigma(P)) are evaluated for the emission transitions observed in all these phosphate glass matrices for both Nd3+ and Dy3+ ions. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：536 / 543
页数：8
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