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arXiv · 2010.12014

Spatiotemporal focusing through a multimode fiber via time-domain wavefront shaping

Matthias C. Velsink·Lyubov V. Amitonova·Pepijn W. H. Pinkse
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Abstract

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 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.

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Matthias C. Velsink, Lyubov V. Amitonova, Pepijn W. H. Pinkse. 2020-10-22. Spatiotemporal focusing through a multimode fiber via time-domain wavefront shaping. https://doi.org/10.1364/oe.412714

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