钕离子1.3μm波段放大特性和浓度猝灭研究

摘要

为了研究Nd~(3+)的摩尔分数对1.3μm处荧光的影响,采用常规的熔融方法制备了钕离子掺杂的0.70TeO_2-(0.30-x)WO_3-xNd_2O_3 (摩尔分数x为0.001,0.003,0.005,0.007,0.01)玻璃系统,得到了Nd~(3+) 1.3μm荧光光谱,同时还研究了荧光峰值波长的有效线宽和受激发射截面与Nd~(3+)摩尔分数的关系.根据Dexter能量转移理论计算了Nd~(3+)在碲酸盐玻璃中能量转移参量C_(d,d)(~4F_(3/2),~4I_(9/2)→~4I_(9/2),~4F_(3/2))和C_(d,a)(~4F_(3/2),~4I_(9/2)→~4I_(15/2),~4I_(15/2)和~4F_(3/2),~4I_(9/2)→~4I_(13/2),~4I_(15/2))值和相应发生浓度猝灭的临界距离R_(d,d)和R_(d,a).结果表明,随着Nd~(3+)的掺杂摩尔分数增加,荧光强度也逐渐增加,到0.005时达到最大:随后当Nd~(3+)的摩尔分数大于0.005时,荧光强度逐渐降低.