Study of an Unsaturated PbSe QD-Doped Fiber Laser by Numerical Simulation and Experiment
Study of an Unsaturated PbSe QD-Doped Fiber Laser by Numerical Simulation and Experiment
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DOI：
10.1109/jqe.2014.2357052
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发表时间：
2014-09
影响因子：
2.5
通讯作者：
Cheng Cheng-Cheng;Fang Yuan;Xiaoyu Cheng
中科院分区：
文献类型：
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作者：
Cheng Cheng-Cheng;Fang Yuan;Xiaoyu Cheng
针对已实现的胶体PbSe量子点光纤激光器，建立了非饱和增益-损耗模型。基于对激光器的实验观察，对模型的数值模拟表明，存在一个依赖于量子点掺杂浓度的泵浦阈值。存在限定的掺杂浓度范围，在该范围内可以产生激光。可用的掺杂密度取决于光纤长度，随着光纤长度的增加呈指数下降。我们的模型表明，在UV固化粘合剂的背景下，量子点的上能级的合理寿命为100 ns，这是短于文献报道的寿命。
We describe an unsaturated gain-loss model in regards to colloidal PbSe quantum dot (QD)-doped fiber laser realized previously. Based on experimental observation on the laser, the numerical simulation on the model indicates there exists a pumping threshold that depends on the QD doping concentration. There is a defined range of doping concentration, within which the laser can be generated. Available doping density depends on the fiber length, following an exponential decrease with the increased fiber length. Our model suggests a reasonable lifetime of 100 ns for the upper level of QDs in the background of UV curing adhesive, which is shorter than the lifetime reported in literatures.