由于光纤激光器较之其他固体激光器在体积、重量、散热等方面有明显的优势,故提出了一种实现武器级光纤激光器的方法。采用大有效面积低数值孔径的掺镱光纤作为光纤激光器,利用弯曲光纤和非稳腔抑制粗芯光纤中的高次模来获得单芯输出6kW的单模功率。用零差法控制和调节19路光纤激光器的相位并使19束激光形成相干叠加。从而得到100kW的合成光束。 Compared with other solid-state lasers, fiber lasers have obvious advantages in terms of volume, weight, heat dissipation and so on. Therefore, a method for realizing weapon-level fiber lasers is proposed. Ytterbium-doped fiber with large effective area and low numerical aperture is used as a fiber laser. Single-core output single-mode power of 6kW is obtained by using curved fiber and non-stable cavity to suppress high-order mode in a thick core fiber. The homodyne method was used to control and adjust the phase of 19 fiber lasers and coherently superimpose 19 laser beams. Resulting in a composite beam of 100 kW.