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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Stimulated emission and optical gain in PbSe quantum dot-doped liquid-core optical fiber based on multi-exciton state
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Stimulated emission and optical gain in PbSe quantum dot-doped liquid-core optical fiber based on multi-exciton state

机译：基于多激子态的PbSe量子点掺杂液芯光纤的受激发射和光增益

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摘要

We studied the properties of stimulated emission and optical gain of 4.4 nm PbSe quantum dot (QD)-doped liquid-core optical fiber based on multi-exciton state under strong pumping condition as a function of QD solution concentration, fiber length and pump power in order to establish the conditions to maximize stimulated emission intensities and optical gain. Auger recombination lifetime and internal quantum efficiency (IQE) were introduced in the multi-exciton model for calculation. Shifts of the spectral peak position were observed and explained in detail. The narrowing spectral half band width and the super linear intensity dependence of the output power with the pump accounted for the generation of stimulated emission. The maximal optical gain of similar to 30 dB was obtained which was larger than that of the single-exciton model under the same fiber parameters. Our interesting results might be useful in the design of optical fiber-based amplifiers and lasers. (C) 2016 Elsevier B.V. All rights reserved.
机译：我们研究了强泵浦条件下基于多激子态的4.4 nm PbSe量子点（QD）掺杂液芯光纤的受激发射和光增益特性与QD溶液浓度，光纤长度和泵浦功率的关系。为了建立使激发的发射强度和光学增益最大化的条件。在多激子模型中引入了俄歇复合寿命和内部量子效率（IQE）进行计算。观察并详细解释了光谱峰位置的变化。光谱半带宽度变窄和泵浦输出功率的超线性强度依赖性导致了受激发射的产生。在相同的光纤参数下，获得的最大光学增益近似于30 dB，大于单激子模型。我们有趣的结果可能对基于光纤的放大器和激光器的设计有用。 （C）2016 Elsevier B.V.保留所有权利。

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