卤素钙钛矿因其带隙可调、增益系数高、合成简单等特点，迅速成为研究微纳激光器的良好平台。然而由于钙钛矿稳定性差，目前钙钛矿激光器与其他光器件耦合困难，导致其出射激光采集效率偏低。本项目拟采用在光纤端面制备钙钛矿微腔的方式，进行钙钛矿微腔激光器和商用光纤的互连研究，探索光纤对钙钛矿激光器出射能量的高效采集问题。建立光纤与微腔耦合的理论和数值模型，揭示两者的能量交换规律和机理，总结微腔和光纤结构参数对耦合效率的影响。研究环形光栅对微腔出射能量波矢的调控作用，提高微腔激光沿光纤传输方向的波矢分量，进而增强微腔的面发射特性，实现光纤对钙钛矿微腔激光的高效率采集。以理论和数值计算结果为指导，在光纤端面制备具有环形光栅结构的钙钛矿微腔。本项目的研究将提升钙钛矿微腔激光器在集成光子回路、远程探测、传感等方面的应用潜力，为增强钙钛矿光器件的实用性提供基础。

Lead halide perovskites have become a promising platform to study micro/nano-scale lasers due to the glorious properties of tunable band gap, high gain coefficient and easy-synthesis. The chemical stability of perovskites is however poor, making it a challenging issue to be addressed in integration and coupling with optical elements. Consequencely, the collecting efficiency of perovskite lasers emitting is quite low. In this project, a method of fabricating perovskite microcavity on commercial fiber facet is proposed, aiming to realize the connection between perovskite microcavity lasers and fiber, and also proving high collecting efficiency of microcavity emitting energy. Based on the developed theoretical and numerical model, we unravel the principle and mechanism of energy exchange between cavity and fiber in order to investigate the influence of morphology parameters on coupling efficiency. In order to improve the far-filed emitting power ratio of microcavity along fiber axis, as well as the collecting efficiency, the microcavity surface emitting ability is effectively modulated by periodic ring gratings. Then the perovskite microcavities surrounded by periodic ring gratings are fabricated onto the fiber facet with the guidance of calculated results. This project will provide a large step toward exploiting the superiority of perovskite microlasers in integrated photonic circuits and remote sensing and reach the reliability required in commercial applications.