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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 27,
  • Issue 12,
  • pp. 2027-2034
  • (2009)

Dynamic Analysis of Crosstalk Performance in Microring-Based Add/Drop Filters

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Abstract

In this paper, the impact of the simultaneous presence of input and add signals in add/drop filters realized with microring resonators is numerically investigated. It is shown that the notch spectral response of output ports is responsible for the intraband crosstalk appearing on the dropped signals in add/drop operation. The investigation of the filter performance is performed with modulated signals at both the input and the add port. The analysis highlights the strong competition between the levels of induced intraband crosstalk and the wavelength selectivity at high bit rate add/drop operation, even in higher order filters. Multistage add/drop topologies that address the inefficiencies of the single-stage add/drop filters are proposed, and successful operation at 40 Gbps nonreturn to zero and return to zero signals is numerically demonstrated.

© 2009 IEEE

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