Abstract We demonstrate an optofluidic microcavity laser based on a hollow-core microstructured optical fiber (HCMOF), which uses the hexagonal silica membrane embedded in the HCMOF as resonator. Fluorescence resonant energy transfer (FRET) effect is introduced into the laser successfully when mixed anthocyanin dye solution is used as gain medium. The threshold of the laser is systematically investigated for several concentration proportions of donor dye to acceptor dye. The results prove that the FRET-based laser shows a considerable reduction in lasing threshold from 595 nJ/mm2 to 113 nJ/mm2. The effect of FRET on lasing threshold makes this HCMOF-based optofluidic microcavity laser to be a promising candidate for biochemical sensing applications.

中文翻译：

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基于荧光共振能量转移的空心微结构光纤光流体激光器的激光阈值降低

摘要 我们展示了一种基于空芯微结构光纤 (HCMOF) 的光流体微腔激光器，它使用嵌入在 HCMOF 中的六方硅膜作为谐振器。当混合花青素染料溶液用作增益介质时，荧光共振能量转移（FRET）效应成功地引入到激光器中。针对供体染料与受体染料的几种浓度比例，系统地研究了激光的阈值。结果证明，基于 FRET 的激光器显示出激光阈值从 595 nJ/mm2 显着降低到 113 nJ/mm2。FRET 对激光阈值的影响使这种基于 HCMOF 的光流体微腔激光器成为生化传感应用的有希望的候选者。