Estimation of the Bandwidth of Acceptable Crosstalk of Parallel Coupled Ring Resonator Add/Drop Filters


In this paper, a parallel coupled optical ring resonator filter is studied and the transfer function is derived using the Signal Flow Graph approach to identify the filter performance in terms of crosstalk suppression bandwidth and signal integrity. This paper proposes the use of the Signal Flow Graph (Mason’s rule) approach to determining the filtering characteristics of ring resonators. A commercial electromagnetic simulator is used to validate the analytical model. The modelling of the parallel coupled ring resonator covers the analysis of the out-of-band rejection ratio, crosstalk suppression, loss effect and the effect of coupling coefficients on the crosstalk bandwidth. The good agreement between analytical model results and simulation results suggest that using the derived analytical model provides an accurate starting point for design and analysis and, in doing this, provides a better insight into the signal integrity performance of the filter


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optical communication equipment;optical crosstalk;optical filters;optical resonators;transfer functions;wavelength division multiplexing;Mason rule;acceptable crosstalk;bandwidth estimation;crosstalk suppression bandwidth;optical ring resonator filter;parallel coupled ring resonator add-drop filters;signal flow graph;signal integrity;transfer function;Analytical models;Bandwidth;Couplings;Crosstalk;Optical ring resonators;Optical waveguides;Transfer functions;Crosstalk;Mason’s rule;Mason's rule;optical filters;parallel ring resonator;wavelength-division multiplexing (WDM)


Mansoor, R., Sasse, H., Al-Asadi, M., Ison, S.J. and Duffy, A.P. (2015) Estimation of the Bandwidth of Acceptable Crosstalk of Parallel Coupled Ring Resonator Add/Drop Filters. IEEE Transactions on Electromagnetic Compatibility, 57 (5), pp. 1005-1012


Research Institute

Institute of Engineering Sciences (IES)