论文标题
多模光纤逐束清理
Multimode optical fiber beam-by-beam cleanup
论文作者
论文摘要
我们介绍并实验证明了分级多模光纤中全光束开关的概念。正交偏振种子和信号梁之间的非线性耦合允许在纤维输出下控制空间束质量。值得注意的是，我们表明，即使是弱模式控制梁，也可能会大大提高强烈的高模信号光束的质量。我们提出了光束开关操作的简单几何表示，其有效性通过输出光束的实验模式分解来定量确认。多模束的全光开关可能会在高功率梁传递和光纤激光器中找到重要的应用。
We introduce and experimentally demonstrate the concept of all-optical beam switching in graded-index multimode optical fibers. Nonlinear coupling between orthogonally polarized seed and signal beams permits to control the spatial beam quality at the fiber output. Remarkably, we show that even a weak few-mode control beam may substantially enhance the quality of an intense, highly multimode signal beam. We propose a simple geometrical representation of the beam switching operation, whose validity is quantitatively confirmed by the experimental mode decomposition of the output beam. All-optical switching of multimode beams may find important applications in high-power beam delivery and fiber lasers.
