Frequency Upconversion Fluorescence Emission of Er3+-Doped Oxychloride Germanate Glass
SUN Hong-Tao1,2, ZHANG Li-Yan1, ZHANG Jun-Jie1, DAI Shi-Xun1, YU Chun-Lei1,2, HU Li-Li1, JIANG Zhong-Hong1
1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2Graduate School of the Chinese Academy of Sciences, Beijing 100049
Frequency Upconversion Fluorescence Emission of Er3+-Doped Oxychloride Germanate Glass
SUN Hong-Tao1,2;ZHANG Li-Yan1;ZHANG Jun-Jie1;DAI Shi-Xun1;YU Chun-Lei1,2;HU Li-Li1;JIANG Zhong-Hong1
1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2Graduate School of the Chinese Academy of Sciences, Beijing 100049
Abstract： Frequency upconversion fluorescence property of Er3+-doped oxychloride germanate glass is investigated. Intense green and red emissions centred at 525, 546, and 657nm, corresponding to the transitions 2H11/2 → 4I15/2, 4S3/2→ 4I15/2, and 4F9/2→ 4I15/2, respectively, were simultaneously observed at room temperature. The quadratic dependence of the 525, 546, and 657nm emissions on excitation power indicates that a two-photon absorption process occurs under 975nm laser diode (LD) excitation. The Raman spectrum investigation indicates that oxychloride germanate glass has the maximum phonon energy at ～805cm°C. The thermal stability of this oxychloride germanate glass is evaluated by differential scanning calorimetry, and thermal stability factor ΔT(ΔT = Tx-Tg) is 187°C. Intense upconversion luminescence and good thermal stability indicate that Er3+-doped oxychloride germanate glass is a promising upconversion laser material.
2005, Vol. 22 
