Influence of Er3+ ion concentration on optical and photoluminescence properties of Er3+-doped gadolinium-calcium silica borate glasses

被引:104
作者
Kesavulu, C. R. [1 ]
Kim, H. J. [1 ]
Lee, S. W. [1 ]
Kaewkhao, J. [2 ]
Wantana, N. [2 ]
Kothan, S. [3 ]
Kaewjaeng, S. [3 ]
机构
[1] Kyungpook Natl Univ, Dept Phys, Daegu 702701, South Korea
[2] Nakhon Pathom Rajabhat Univ, Ctr Excellence Glass Technol & Mat Sci CEGM, Nakhon Pathom 73000, Thailand
[3] Chiang Mai Univ, Fac Associated Med Sci, Dept Radiol Technol, Chiang Mai 50200, Thailand
关键词
Er3+ glasses; Optical properties; NIR luminescence; Decay time; Optical amplifiers; RARE-EARTH IONS; MU-M EMISSION; SPECTROSCOPIC PROPERTIES; UP-CONVERSION; TELLURITE GLASSES; THERMAL-STABILITY; OXIDE GLASSES; ABSORPTION INTENSITIES; BOROSILICATE GLASSES; SPECTRAL PROPERTIES;
D O I
10.1016/j.jallcom.2016.04.314
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The Er3+-doped gadolinium calcium silica borate glasses of composition (55-x) B2O3 - 10 SiO2 - 25 Gd2O3 - 10 CaO - x Er2O3, where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol %, have been prepared by conventional melt quenching technique and are characterized through optical absorption, visible and near-infrared (NIR) emission spectra and decay time measurements. Judd-Ofelt (JO) intensity parameters (Omega(lambda), lambda = 2, 4 and 6) have been derived from the absorption spectrum of 0.5 mol % Er2O3 doped glass and in turn are used to calculate radiative properties for the important luminescent levels of Er3+ ions. The studied glasses show intense and broad green (550 nm) and red (591 nm) visible emissions under at 379 nm excitation. Upon excitation at 980 nm laser diode, an intense 1.53 mm NIR emission has been observed with the maximum full width at half maximum (FWHM) and its value is found to be 106 nm for 2.5 mol % Er3+-doped gadolinium calcium silica borate glasses. This broad luminescence locates in the region of 1420-1635 nm and covers the S, C and L bands. The decay curves of the I-4(13/2) level exhibit exponential nature for all the concentrations. The lifetime of the I-4(13/2) level has found to be decrease from 1.46 to 1.35 ms with increase of Er3+ ion concentration. Hence, these results clearly indicate that present glasses are suitable for efficient short and conventional-length optical amplifiers and tunable lasers. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:590 / 598
页数:9
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