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Journal Article

Broadband robustly single-mode hollow-core PCF by resonant filtering of higher-order modes

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Uebel,  Patrick
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

Guenendi,  Mehmet C.
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Frosz,  Michael H.
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Ahmed,  Goran
Fibre Fabrication and Glass Studio, Technology Development and Service Units, Max Planck Institute for the Science of Light, Max Planck Society;
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

Edavalath,  Nitin N.
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Menard,  Jean-Michel
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Russell,  Philip St. J.
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Uebel, P., Guenendi, M. C., Frosz, M. H., Ahmed, G., Edavalath, N. N., Menard, J.-M., et al. (2016). Broadband robustly single-mode hollow-core PCF by resonant filtering of higher-order modes. OPTICS LETTERS, 41(9), 1961-1964. doi:10.1364/OL.41.001961.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-62D5-A
Abstract
We report a hollow-core photonic crystal fiber that is engineered so as to strongly suppress higher-order modes, i.e., to provide robust LP01 single-mode guidance in all the wavelength ranges where the fiber guides with low loss. Encircling the core is a single ring of nontouching glass elements whose modes are tailored to ensure resonant phase-matched coupling to higher-order core modes. We show that the resulting modal filtering effect depends on only one dimensionless shape parameter, akin to the well-known d/Lambda parameter for endlessly single-mode solid-core PCF. Fabricated fibers show higher-order mode losses some similar to 100 higher than for the LP01 mode, with LP01 losses <0.2 dB/m in the near-infrared and a spectral flatness similar to 1 dB over a >110 THz bandwidth. (C) 2016 Optical Society of America