通过将单芯单模光纤与多芯光纤纤芯对准熔接后,再在多芯光纤任意位置进行热熔融拉锥,实现多芯光纤光功率的高效耦合注入和光功率在各个纤芯中分布比例的控制,解决了由于多芯光纤结构特殊引起的光源光功率难于直接注入的问题。基于光纤耦合模式理论建立多芯光纤各纤芯之间的耦合模方程,得到各个纤芯中光功率变化与耦合长度之间的变化曲线,并与实际耦合实验结果对比,验证此方法的可行性。研究结果可为多芯光纤光学器件的发展提供潜在的应用价值。 By aligning the single-core single-mode optical fiber with the multi-core fiber core and then performing the hot-melt taper at any position of the multi-core fiber, efficient coupling injection of the optical power of the multi-core fiber and the distribution ratio of the optical power in each core , Which solves the problem that it is difficult to directly inject the optical power of the light source due to the special structure of the multi-core optical fiber. Based on the theory of fiber coupling mode, the coupling mode equations of each core of multi-core fiber are established, and the curves of the variation of optical power and the coupling length in each core are obtained. The feasibility of this method is verified by comparison with the experimental results . The research results can provide potential application value for the development of multi-core optical fiber optics.