油酸修饰的LaF_3:Er,Yb纳米颗粒的光学特性及有机-无机复合型光波导放大器

采用微乳液法制备了LaF3:Er,Yb纳米颗粒,在有机-无机杂化材料中有良好的溶解性,掺杂质量比可达到50%。通过TEM观察到纳米颗粒的粒径为6~10 nm;XRD的测试结果表明材料中形成了LaF3六方晶体结构;荧光发射谱的测试表明纳米颗粒的荧光半峰全宽为79 nm;通过时间相关单光子计数法测得铒离子4I13/2能级的寿命为100μs。结合半导体工艺,制备了嵌入条形结构的平面光波导放大器,在信号光(1 550nm)功率为0.2 mW,泵浦光(980 nm)功率为188 mW的条件下,在1.9 cm的样品上得到了3.2 dB的相对增益;同时分析了散射损耗随颗粒大小的变化关系。

Investigation of The Characteristics of Oleic Modified LaF3:Er, Yb Nanoparticle and Fabrication of Inorganic-organic Hybrid Waveguide Amplifier

In this paper, oleic modified LaF3:Er,Yb nanoparticle (NP) is prepared by micro-emulsion method. This NP has a excellent solubility in organic solvent and NPs doping concentration can reach as high as 50%. Observed by TEMs photograph, most of NPs diameter is about 6~10 nm; there is hexagonal LaF3 structure in the materials by X-ray diffraction pattern; NP shows potential high gain bandwidth because full width at half maximum (FWHM) is 79 nm which is bigger than inorganic matrix erbium doped waveguide amplifier (EDWA); 100 μs lifetime of the 4I13/2 energy level is also measured. At last, a planar waveguide is fabricated by semiconductor process, a relative gain of 3.2 dB can be got in a 1.9 cm length sample with 1 mW signal power. The relationship between gain and nanopaticle diameter is also analyzed.