Velsink Matthias C, Amitonova Lyubov V, Pinkse Pepijn W H
Opt Express. 2021 Jan 4;29(1):272-290. doi: 10.1364/OE.412714.
We shape fs optical pulses and deliver them in a single spatial mode to the input of a multimode fiber. The pulse is shaped in time such that at the output of the multimode fiber an ultrashort pulse appears at a predefined focus. Our result shows how to raster scan an ultrashort pulse at the output of a stiff piece of square-core step-index multimode fiber and in this way show the potential for making a nonlinear fluorescent image of the scene behind the fiber, while the connection to the multimode fiber can be established via a thin and flexible single-mode fiber. The experimental results match our numerical simulation well.
我们对飞秒光脉冲进行整形，并将其以单空间模式传输到多模光纤的输入端。脉冲在时间上被整形，以便在多模光纤的输出端，一个超短脉冲出现在预定义的焦点处。我们的结果展示了如何在一段硬的方形芯阶跃折射率多模光纤的输出端对超短脉冲进行光栅扫描，从而显示了对光纤后方场景制作非线性荧光图像的潜力，同时可以通过一根细且灵活的单模光纤与多模光纤建立连接。实验结果与我们的数值模拟吻合得很好。
