钕离子1.3μm波段放大特性和浓度猝灭研究  

1.3μm emission and concentration quenching in Nd^(3+) -doped glass

作　　者：厉旭杰[1,2] 李虎雄[1] 

机构地区：[1]温州大学物理与电子信息工程学院,温州325035 [2]宁波大学信息科学与工程学院,宁波315211

出　　处：《激光技术》2010年第1期48-52,共5页Laser Technology

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。In order to study the effect of Nd3＋ concentration on the fluorescence property at 1. 3μm, Nd2 O3 -doped 0.70TeO2 - （ 30 - x） WO3 -xNd2 O3 （ mole fraction x is 0. 001,0.003,0. 005,0.007,0. 010） tellurite glass was prepared by means of the conventional melt-quenching method. The fluorescence spectra were obtained. The dependence of the effective bandwidth and the stimulated emission cross-sections of 4F3/2→4I13/2 transition on Nd3＋ concentration was studied. Based on the electric dipole-dipole interaction theory, the interaction parameters, Cd,d, for the energy migration rate 4 F3/2,4 I9/2 → I9/2 , 4 F3/2 and Cd,a, for cross relaxation rate 4F3/2 ,419/2^-~4115/2,4Ii5/2 ,and/or 4F3/2 ,4I9/2→4 I13/2,4I15/2 in tellurite glass are about 10.6× 10 -40 cm6/s and 2.80 × 10-40 cm6/s, respectively. The result shows that the fluorescence intensity drastically increases and has a maximum around 0. 005 （ mole fraction） Nd2 O3 and decreases with increase of the Nd2 O3 concentration.

关 键 词：光电子学 荧光强度 能量转移 浓度猝灭 

分 类 号：O614.335[理学—无机化学]