Modulational instability and spectral broadening of vortex modes in chiral 
photonic crystal fibers

Roth, Paul; Russell, Philip; Frosz, Michael; Chen, Yang; Wong, Gordon

doi:10.1109/JLT.2022.3187197

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学術論文

Modulational instability and spectral broadening of vortex modes in chiral photonic crystal fibers

MPS-Authors

/persons/resource/persons216175

Roth, Paul
Russell Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201171

Russell, Philip
Russell Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201064

Frosz, Michael
Fibre Fabrication and Glass Studio, Technology Development and Service Units, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons227744

Chen, Yang
Russell Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201235

Wong, Gordon
Russell Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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https://ieeexplore.ieee.org/abstract/document/9810352
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引用

Roth, P., Russell, P., Frosz, M., Chen, Y., & Wong, G. (2023). Modulational instability and spectral broadening of vortex modes in chiral photonic crystal fibers. Journal of Lightwave Technology, 41(7), 2061-2069. doi:10.1109/JLT.2022.3187197.

引用: https://hdl.handle.net/21.11116/0000-000C-CF04-7

要旨

We report on intra- and inter-modal four-wave-mixing (FWM) in N-fold rotationally symmetric (C_N) single- and multi-core chiral photonic crystal fiber (PCF), created by spinning the preform during fiber drawing. The non-circular modal field is forced to rotate as it propagates along the fiber, resulting in circular birefringence and robust maintenance of circular polarization state. Multi-core chiral C_N PCF supports vortex-carrying helical Bloch modes (HBMs) in which the degeneracy between clockwise and counter-clockwise vortices is lifted. This makes possible new kinds of intermodal polarization modulational instability (PMI). We develop PMI theory for vortex HBMs, and illustrate the results by a series of experiments in which two or more PMI sidebands with different vorticities and polarization states are selectively generated by adjusting the polarization state and topological charge of the pump light. In every case both the topological charge and the spin of the pump light are conserved. We also report generation of a broadband supercontinuum in a single circularly polarized vortex mode.