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Tunable modulational instability sidebands via parametric resonance in periodically tapered optical fibers

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Armaroli,  Andrea
Biancalana Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Biancalana,  Fabio
Biancalana Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Armaroli, A., & Biancalana, F. (2012). Tunable modulational instability sidebands via parametric resonance in periodically tapered optical fibers. OPTICS EXPRESS, 20(22), 25096-25110. doi:10.1364/OE.20.025096.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-686F-B
Abstract
We analyze the modulation instability induced by periodic variations of group velocity dispersion and nonlinearity in optical fibers, which may be interpreted as an analogue of the well-known parametric resonance in mechanics. We derive accurate analytical estimates of resonant detuning, maximum gain and instability margins, significantly improving on previous literature on the subject. We also design a periodically tapered photonic crystal fiber, in order to achieve narrow instability sidebands at a detuning of 35 THz, above the Raman maximum gain peak of fused silica. The wide tunability of the resonant peaks by variations of the tapering period and depth will allow to implement sources of correlated photon pairs which are far-detuned from the input pump wavelength, with important applications in quantum optics. (C) 2012 Optical Society of America