制备了一种新的Ni2+掺杂La2O3-Ga2O3-Al2O3-SiO2(LGAS)透明微晶玻璃.研究了Ni2+掺杂微晶玻璃的光谱特性,发现Ni2+掺杂LGAS掺杂微晶玻璃具有较长的荧光寿命和较宽的荧光光谱,荧光中心位于1260 nm,荧光半高宽为320nm,荧光寿命和受激发射截面的乘积为6.87×10-24cm2·s.分析认为,Ni2+掺杂LGAS微晶玻璃的超宽带荧光来源于高场态纳米晶中Ni2+的3T2(3F)→3A2(3F).研究认为,Ni2+掺杂LGAS微晶玻璃可用作超宽带光纤放大器潜在的增益介质材料.
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