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Growth and spectral characterization of Er3+-doped (Sr0.7Ca0.3)3Y(BO3)3 crystal

LEI WU1,2, ZHOUBIN LIN1, LIZHEN ZHANG1, YISHENG HUANG1, GUOFU WANG1,*

Affiliation

  1. Key Laboratory of Optoelectronics Material Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
  2. Graduate School of Chinese Academy of Science, Beijing 100037, China

Abstract

Er3+:(Sr0.7Ca0.3)3Y(BO3)3 crystal with dimensions of  2134 mm3 has been grown by the Czochralski method. The polarized spectral properties were investigated. Based on the Judd-Ofelt theory, the oscillator strength parameters, transition probability, fluorescence branching ratio and radiative lifetime were estimated. The stimulated emission cross-sections of Er3+:(Sr0.7Ca0.3)3Y(BO3)3 crystal were calculated to be 21.010-21cm2 at 1541nm for the π-polarization and 2.2510-20cm2 at 1536nm for the σ-polarization. The quantum efficiency ηc, Er3+:(Sr0.7Ca0.3)3Y(BO3)3 crystal is 40.3%. In comparison with Er3+:Sr3Y(BO3)3 crystal, the spectral properties of Er3+:(Sr0.7Ca0.3)3Y(BO3)3 crystal are better than that of Sr3Y(BO3)3 crystal. The investigated results showed that after the Ca2+ ion partly substitute for Sr2+ ion in Sr3Y(BO3)3 crystal to form the (Sr0.7Ca0.3)3Y(BO3)3 solid solution, it can greatly improve the quantum efficiency  of Er3+:(Sr0.7Ca0.3)3Y(BO3)3 crystal. Therefore, Er3+:(Sr0.7Ca0.3)3Y(BO3)3 crystal may be become a 1.55 m laser crystal materials..

Keywords

Laser crystal, Crystal growth, Spectral properties, Er3+:(Sr0.7Ca0.3)3Y(BO3)3 crystal.

Citation

LEI WU, ZHOUBIN LIN, LIZHEN ZHANG, YISHENG HUANG, GUOFU WANG, Growth and spectral characterization of Er3+-doped (Sr0.7Ca0.3)3Y(BO3)3 crystal, Optoelectronics and Advanced Materials - Rapid Communications, 6, 7-8, July-August 2012, pp.687-692 (2012).

Submitted at: April 29, 2012

Accepted at: July 19, 2012