新型光子晶体光纤激光器结构设计及光传输性能研究

项目名称： 新型光子晶体光纤激光器结构设计及光传输性能研究

项目编号： No.61307093

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 江萍

作者单位： 电子科技大学

项目金额： 26万元

中文摘要： 研究光子晶体光纤和光子晶体球形F-P谐振腔，构建新型结构的光子晶体光纤激光器，产生空心光束且实现接近衍射极限的高精度准直。空心光束能避免空间光通信系统中光学天线次镜中心反射所造成的能量损失，有效提高光通信系统的传输效率；接近衍射极限的高精度准直能有效提高光通信系统的发射精度。具体内容包括： 1）利用光子晶体光纤折射率引导原理，设计高折射率的纤芯和空气柱包层中同轴缺陷环，构建新型大模场面积光子晶体光纤，产生空心光束。利用表面孤子特性优化光子晶体光纤结构实现接近衍射极限的高精度准直；2）研究光子晶体球形F-P谐振腔的传输特性，并对光子晶体光纤激光器结构进行优化设计；3）对光学天线系统三维传输进行理论建模，分析空心光束在光学天线系统中的传输特性；4）加工制作，实验测试与验证。 本项目对空间光通信提高发射精度、增加传输效率进行应用研究基础，在光通信技术领域具有重要的理论研究意义和应用前景。

中文关键词： 光子晶体光纤；空心激光束；光学天线；光纤耦合；传输效率

英文摘要： Combined with a photonic crystal fiber and a photonic crystal spherical Fabry-Perot cavity, a novel photonic crystal fiber laser structure will be constructructed, and a precision collimated hollow beam which approaches to the diffraction limit will be produced. The hollow beam could avoid the loss of energy caused by the subreflector center reflection in the optical antenna, and the transmission efficiency in the space optical communication system will be greatly enhanced. The precision collimation effect which approaches to the diffraction could greatly improve the transmittion accuracy. Details as following: （1） Base on the index guiding principle, a novel large-mode-area photonic crystal fiber with a high refractive index fiber core and a coaxial ring defect in the air hole clad will be constructed, which produces a hollow beam. The surface soliton properties will be investigated to optimize the photonic crystal fiber structure and high precision collimation which approach to the diffraction limit will be achieved. （2）The transmission characteristics of spherical photonic crystal F-P cavity will be investigated, and the photonic crystal fiber laser structure will be optimized; （3）A three-dimentional transmission the optical antenna will be theoretically modeled, and the on-axis and off-axis alignment propaga

英文关键词： Photonic crystal fiber；Hollow laser beam；Optical antenna；Fiber coupling；Transmission efficiency