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| Judd-Ofelt Theory Analysis and Spectroscopic Properties of Nd3+-Doped Cadmium Aluminium Silicate Glasses |
| CHEN Yue-e1, SHAO Qiu-feng2, JIA Li-xiao1 |
1. Yanshan University, Qinhuangdao 066004, China
2. National University of Defense Technology, Changsha 410022, China |
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Abstract Photonic crystal fiber laser has been attached great attention by many researches, and preparation of photonic crystal fiber cores becomes the key problem in study of photonic crystal fibers. Nd3+ doped lithium- cadmium heavy- metal silicate glass samples have prepared with the method of high temperature melting, which 40SiO2-14Al2O3-(40-x)CdO-2Li2O-2K2O-2Na2O-xNd2O3 (x=0.07，0.14，0.21，0.35，0.42，0.56 mol) samples have been measured absorption and fluorescence spectra. Applying Judd- Ofelt theory, its intensity parameter Ωt(t=2, 4, 6), the oscillator strength and spontaneous radiation probability of the Nd3+ ion, fluorescence branching ratio, and the fluorescence lifetime were theoretically calculated. Using fluorescence spectrum, the stimulated emission cross section of the 4F3/2→4I11/2 transition and the full width at half maximum of the fluorescence band were also measured. The result demonstrates that the Nd3+ doped lithium-cadmium heavy-metal silicate glass sample When mixing Nd2O3 mole fraction of is 0.42 possesses a large stimulated emission cross section and a wide fluorescence band compared with the literature of neodymium ions doped glass. These parameters clearly indicate that this kind of silicate glass has a good laser excitation property and is expected to be applied in the study of the doped photonic crystal fibers.
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Received: 2016-08-11
Accepted: 2016-12-18
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