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Phys Rev Lett. 2016 Jul 29;117(5):053901. doi: 10.1103/PhysRevLett.117.053901. Epub 2016 Jul 25.

Spatiotemporal Control of Light Transmission through a Multimode Fiber with Strong Mode Coupling.

Author information

1
Applied Physics Department, Yale University, New Haven CT 06520, USA.
2
Institute for Theoretical Physics, Vienna University of Technology, A-1040 Vienna, Austria.

Abstract

We experimentally generate and characterize eigenstates of the Wigner-Smith time-delay matrix, called principal modes, in a multimode fiber with strong mode coupling. The unique spectral and temporal properties of principal modes enable global control of temporal dynamics of optical pulses transmitted through the fiber, despite random mode mixing. Our analysis reveals that well-defined delay times of the eigenstates are formed by multipath interference, which can be effectively manipulated by spatial degrees of freedom of input wave fronts. This study is essential to controlling dynamics of wave scattering, paving the way for coherent control of pulse propagation through complex media.

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