Tunable Modulational Instability Sidebands via Parametric Resonance in Periodically Tapered Optical Fibers

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.

15 pages, 7 figures

References in corpus (2)

• Nonlinear excitations in arrays of Bose-Einstein condensates
• Bridging Visible and Telecom Wavelengths with a Single-Mode Broadband Photon Pair Source

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• Modulational instability in randomly dispersion-managed fiber links
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