Spectroscopic properties of Nd-doped phosphate glass with a high emission cross section

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: Nd3+ ions phosphate glass emission cross section fluorescence line narrowing
• 年，卷（期）: 2002,（6）
• 页码范围: 613-618
• 页数: 6页
• 分类号: O4
• 语种: 英文

摘要

Neodymium doped phosphate glasses have been prepared by the semi-continuous melting technique. Their ab-sorption and emission spectra have been recorded at room temperature. The Judd-Ofelt theory has been applied to ewluate the stimulated emission cross sections of 4F3/2→4I11/2 transition for Nd3+. The higher stimulated emission cross section, 4.0×10-20cm2, is obtained. The fluorescence decays of the 4F3/2→411/2 transition of Nd3+ are mea-sured for the samples doped (0.7-10) wt% of Nd2O3 at room temperature. The concentration quenching of Nd-doped phosphate glass is mainly attributed to cross-relaxation and energy migration. The site-dependent properties of fluores-cence spectra and the fluorescence lifetime of the Nd3+-doped phosphate glass (with 2.2wt% Nd2O3) are studied using laser-induced fluorescence line narrowing techniques, and the site-to-site variations of optical properties are observed at low temperature.