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Optics Express

Optical buffer with higher delay-bandwidth product in a two-ring system

Landobasa Y. M. Tobing, Mee Koy Chin

Published Jan 1, 2008• 50 citations
Publisher

Abstract

We propose a new scheme for buffering optical signals in two-ring resonator system that has a larger delay-bandwidth product than those achievable in single-ring and two-ring configurations of the optical analog of electromagnetically-induced transparency (EIT).
DOI
10.1364/oe.16.001796

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Based on an analog of electromagnetically induced transparency (EIT) in microfiber knot resonators with a two-ring parallel connection structure, a wide bandwidth and zero-dispersion slow-light waveguide is proposed. The EIT-like transmission spectrum with the variation of wavelengths for different coupling coefficients is numerical simulated. By appropriately adjusting the coupling coefficients of the two knot rings, a group time delay of about 72.4 ps with a flat wavelength bandwidth of about 82.7 pm and a full width at half-maximum of about 228 pm at one of the induced transparency windows is achieved theoretically. And the group time delay dispersion at the same induced transparency window nearly reaches to zero with a wavelength bandwidth of about 82.7 pm.