Near-infrared and upconversion properties of neodymium-doped RE0.8La0.2VO4 (RE = Y, Gd) single-crystal fibres grown by the laser-heated pedestal growth technique

被引:8
作者
de Camargo, ASS [1 ]
Nunes, LAO [1 ]
Andreeta, MRB [1 ]
Hernandes, AC [1 ]
机构
[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP, Brazil
关键词
D O I
10.1088/0953-8984/14/50/314
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Neodymium-doped Y0.8La0.2VO4 and Gd0.8La0.2VO4 single-crystal fibres were successfully grown by the laser-heated pedestal growth (LHPG) technique.. The fibres were completely transparent and no dark inclusions were observed by optical microscopy. In the characterization process, microprobe Raman, optical absorption, fluorescence, lifetime, and gain-excited state absorption spectra were investigated in addition to upconversion measurements. The fibres' structural and spectroscopic properties are very similar to those of YVO4 and GdVO4 bulk laser crystals, with the advantageous characteristic of broadened spectral linewidths that facilitate the pumping of the 1064 nm. emission by a diode laser. These fairly new crystal compositions, that can be grown in fast and economical processes, are potential candidates for use as compact laser-active media.
引用
收藏
页码:13889 / 13897
页数:9
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