介绍了一种新型增益导引-折射率反导引大模场光纤的结构、基本理论以及其在光纤激光器领域的重要应用。在综合分析了不同抽运条件下的激光输出特性以及光纤的热效应特征后，得出侧面抽运是增益导引-折射率反导引大模场光纤的最佳抽运方案的结论；重点介绍了增益导引-折射率反导引大模场光纤侧面抽运的理论模拟以及基于V形槽技术的侧面抽运实验研究过程，为相关领域的实验研究提供了参考；最后分析了实验结果与理论差距较大的原因，并提出了改进的方向。%In this paper, we introduce a new type of gain guided and index antiguided (GG-IAG) large mode area (LMA) fiber structure, basic theory and its important applications in fiber laser fields. We draw a conclusion that the side pump technology is the most appropriate scheme for GG-IAG LMA fiber after comprehensively analyzing the laser output characteristics and the thermal effect of the fiber under different pump conditions. The theoretical simulations of GG-IAG fiber side pump technology and the side pump experiment process are performed by the V groove technology, which is conducible to the experiment research in relevant fields. Finally, the suggestion of how to reduce the difference between the experimental results and the theoretical results is made and its relevant reason is also discussed.
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