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纤芯激光功率密度过高,易引起非线性效应,导致激光损伤,限制光纤激光器输出功率的提高,采用多芯光纤是解决这一问题的有效方案之一。同相位超模的选择和多芯光纤的制作是影响多芯光纤激光器发展的主要因素,因此实现同相位超模运转的大模场面积多芯光纤研究成为近年来国内外研究人员关注的热点。详细介绍了当前多芯光纤选模及制造技术的研究进展,通过对比几种技术方案的可行性,展望了高功率多芯光纤激光器单模运转的发展前景。
Fiber core laser power density is too high, easy to cause nonlinear effects, leading to laser damage, limiting the output power of fiber lasers to improve the use of multi-core optical fiber is an effective solution to this problem. The selection of the same phase supermode and the fabrication of multi-core fiber are the main factors affecting the development of multi-core fiber lasers. Therefore, the research on large mode field area multi-core fiber with in-phase supermode operation has become a hot topic in recent years. The current research progress of multimode fiber optics and manufacturing technology are introduced in detail. By comparing the feasibility of several technical solutions, the prospect of single mode operation of high power multi-core fiber laser is prospected.