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Broadband Mach–Zehnder Switch for Photonic Networks on Chip

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3 Author(s)
Calo, G. ; Dipt. di Elettrotec. ed Elettron., Politec. di Bari, Bari, Italy ; D'Orazio, A. ; Petruzzelli, V.

In this paper, we propose a broadband silicon Mach-Zehnder switch (MZS) for wavelength division multiplexing applications on photonic networks on chip. The proposed reconfigurable switch is based on a single-stage three-waveguide interferometric configuration in which the phase shift is achieved via a p-i-n diode. The device is analyzed by the coupled-mode theory and by the finite-difference beam propagation method. The proposed configuration leads to a considerable increase in the bandwidth with respect to the conventional MZS. For example, the two-waveguide MZS with a gap g=0.30 μm between the two coupled waveguides exhibits bandwidth Δλ = 60 nm, crosstalk CT = - 15 dB, and insertion loss IL = 1.1 dB. Conversely, a bandwidth Δλ = 115 nm is achieved for the three-waveguide configuration to parity of the other parameters.

Published in:

Lightwave Technology, Journal of  (Volume:30 ,  Issue: 7 )

Date of Publication:

April1, 2012

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