紫外胶固态纤芯PbSe量子点光纤制备及光谱测量

Preparation and Spectrum Measurement of PbSe Quantum-Dot Doped Fiber with a Solid Fiber Core of UV Gel

采用粒直径为4．4nm的PbSe量子点及紫外（UV）固化胶，制备了掺杂质量浓度为0．1～6．0mg／mL、不同长度的固态纤芯量子点光纤。通过测量量子点光纤吸收谱，确定了量子点光纤980nm波长随掺杂浓度和光纤长度变化的吸收截面。测量了量子点光纤的光致荧光（PL）谱，其峰值光强随掺杂浓度和光纤长度变化，存在一个与最大峰值强度对应的掺杂浓度和光纤长度。实验结果有助于对PbSe量子点光纤放大器和激光器的进一步研究。

PbSe quantum dot （QD, in 4.4-nm diameter） doped fibers are prepared with a solid fiber core of UV gel, in doping concentration from 0.1 mg/mL to 6.0 mg/mL, and with different fiber lengths. By measuring the absorption spectra of QD doped fibers, the absorption cross-section of 980 nm varying with the doping concentration and the fiber length is determined. Measuring photoluminescence （PL） spectra of the doped fibers show that the PL-peak intensity varies with both the doping concentration and fiber length. Thus, there is an advisable doping concentration and fiber length corresponding to the maximum PL intensity. The results presented in this paper provide a support for development of PbSe-QD doped fiber amplifiers and lasers in the future.