国产掺镱双包层光纤激光器的研究

Study on fiber laser with China-made Yb^(3+)-doped double-clad fiber

高功率光纤激光器在定向能领域有着重要的应用。为了研究双包层光纤激光器的输出特性,采用数值模拟和实验研究的方法,进行了理论分析和实验验证。用国产大芯径掺镱光纤搭建了双包层光纤激光器,获得了1092nm的激光输出,功率为1.6W。结果表明,光纤最佳长度与后腔镜和抽运功率有很大关系,通过优化设计后腔镜,选取最佳后腔镜信号光反射率R2,可获得最大激光功率输出,提高激光器效率,获得特定的稳定的纵模输出,优化系统的性能。

High power fiber laser has important application in the directed energy domain. In order to find the laser output characteristic under different fiber length and back-cavity mirrors, numerical simulation and experiment method were used. With home-made large-core Yb-dopped fiber, double-clad fiber laser system was constructed. And the signal laser with a central wavelength of 1092nm and the maximum output power of 1.6W was obtained. It was shown that optimum fiber length had important contact with back-cavity and pump power. The maximum output could be obtained with the optimum R2. It is found that the output characteristics of the fiber laser can be better by design the reflectivity ratio of the back - cavity mirror.