1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China 2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China
Abstract：Er3+-doped tellurite glasses with four different concentrations were fabricated, and the oscillator strength of Er3+ in the tellurite glasses were calculated through the absorption spectra of the glasses. The Judd-Ofelt intensity parameter Ωi,spontaneous transition probability A,fluorescence branching ratio β,and radiative lifetime τrad of Er3+ were calculated on the basis of Judd-Ofelt theory，and the effect of the erbium ion concentration on the above optical parameters was also discussed. The fluorescence spectra of Er3+: 4I13/2→4I15/2 transition and the lifetime of Er3+: 4I13/2 level of the samples were measured. The stimulated emission cross-section of 4I13/2→4I15/2 transition of the samples was finally calculated by using McCumber theory. The results show that with the increase in the Er3+ concentration, the oscillator strength and spontaneous transition probability A of Er3+ increase, while the fluorescence branching ratio β of Er3+ shows little difference. The stimulated emission cross-section of Er3+: 4I13/2→4I15/2 transition of the samples changes slightly with the increase in the Er3+ concentration. All the fluorescence effective line widths for the four different Er3+ concentration samples are nearly 50 nm.
[1] Wang J S, Vogel E M, Snitzer E. Opt. Mater., 1994, 3: 187. [2] Mori A, Kobayashi K, Yamada M, et al. Electron. Lett., 1998, 34(9): 887. [3] YANG Jian-hu, DAI Shi-xun, DAI Neng-li, et al(杨建虎, 戴世勋, 戴能利, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2003, 23(6): 1065. [4] YANG Jian-hu, DAI Shi-xun, HU Li-li, et al(杨建虎, 戴世勋, 胡丽丽，等). Acta Optica Sinica(光学学报)，2003, 23(2): 210. [5] DAI Shi-xun, YANG Jian-hu, XU Shi-qing, et al(戴世勋, 杨建虎, 徐时清, 等). Optical Fiber & Electric Cable and Their Applications(光纤与电缆及其应用技术)，2003, 1: 7. [6] Le Neindre L, Jiang S, Hwang B C, et al. J. Non-cryst. Solids, 1999, 255: 97. [7] ZHANG Qing-li, HE Wei, SUN Dun-lu, et al(张庆礼，何 伟，孙敦陆，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2005，25(3)：329. [8] YAO Lian-zeng, ZHANG Hai-feng, ZHANG Shu-zhen, et al(姚连增, 张海峰, 张淑贞, 等). Chin. J. Lasers(中国激光)，1994, 21(6)：513. [9] Judd B R. Phys. Rev., 1962, 127: 750. [10] Ofelt G S. J. Chem. Phys., 1962, 37: 511. [11] Weber M J. Phys. Rev., 1967, 156(2): 231. [12] Setsuhisa Tanabe, Kiyoshi Tamai, Kazuyuki Hirao, et al. Phy. Rev. B, 1996, 53(13): 8358. [13] Tanabe S. J. Non-Cry. Solids, 1999, 259: 1. [14] YANG Jian-hu, DAI Shi-xun, DAI Neng-li, et al(杨建虎, 戴世勋, 戴能利, 等). J. Inorganic Materials(无机材料学报)，2003, 18(4)：751. [15] Feng X, Tanabe S, Hanada T. J. Am. Ceram. Soc. , 2001, 84(1): 165. [16] ZHANG Long, LIN Feng-ying, HU He-fang(张 龙, 林凤英, 胡和方). Acta Physica Sinica(物理学报), 2001, 50(7): 1378. [17] DAI Shi-xun, YANG Jian-hu, DAI Neng-li, et al(戴世勋, 杨建虎, 戴能利, 等). Acta Physica Sinica(物理学报), 2003, 52(6): 1533. [18] Feng X, Tanabe S, Hanada T. J. Appl. Phys., 2001, 89(7): 3560. [19] Biswal S, Nees J, Nishimura A, et al. Optics Communications, 1999, 160: 92. [20] McCumber D E. Phys. Rev., 1964, 134(2): 299. [21] Miniscalo W J, Quimby R S. Opt. Lett., 1991, 16: 258.
