基于钠铝硼硅酸盐玻璃的近红外宽带PbSe量子点光纤的光传输特性  

Optical Propagation Characteristics of Near-Infrared Broadband PbSe Quantum-Dot-Doped Fiber Based on Sodium-Aluminum-Borosilicate Silicate Glass

作　　者：程成[1] 吴宜强 Cheng Cheng;Wu Yiqiang(Institute of Intelligent Optoelectronic Technology,Zhejiang University of Technology Hangzhou,Zhejiang 310023,China)

机构地区：[1]浙江工业大学光电子智能化技术研究所,浙江杭州310023

出　　处：《光学学报》2018年第11期42-48,共7页Acta Optica Sinica

基　　金：国家自然科学基金(61274124;61474100)

摘　　要：用高温熔融二次热处理法,制备了钠铝硼硅酸盐PbSe量子点玻璃及量子点光纤。光纤中量子点的尺寸为4.73 nm±0.25 nm,吸收和辐射峰分别位于1450 nm和1500 nm。测量了量子点光纤的吸收谱、光致荧光(PL)光谱、PL峰值光强随抽运功率的变化,以及980 nm抽运功率在光纤中的衰减系数、PL峰值光强和PL峰值波长随光纤长度的变化。确定了量子点光纤随波长变化的衰减系数、抽运激励阈值功率和饱和功率。从能级跃迁、表面效应等方面解释了实验现象。The sodium-aluminium borosilicate glass and quantum-dot （QD）-doped fiber are fabricated by the twostep high temperature annealing method. The QDs within the fiber have a size of 4.73 nm±0.25 nm and their absorption and emission peaks are at 1450 nm and 1500 nm, respectively. The absorption spectra, photoluminescenee （PL） spectra and PL peak intensity versus pumping power are measured. The attenuation coefficient within the fiber at 980 nm pumping power and PL peak intensity and peak wavelength versus fiber length are also measured. The wavelength-dependent attenuation coefficient, pumping excitation threshold and saturation power in the QD- doped fiber are determined. The experimental phenomena is explained from the aspects of energy-level transition, surface effects, and so on.

关 键 词：光纤光学 PbSe量子点玻璃 量子点玻璃光纤 光致荧光 光纤衰减系数 能级跃迁 

分 类 号：O433.4[机械工程—光学工程]