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This paper presents the architecture of WONDER, an innovative WDM optical packet network suited for a high-capacity metro environment. The network prototype is under development in the PhotonLab at Politecnico di Torino. The WONDER network architecture elaborates on the effectiveness of optical with respect to electronic devices, trying to identify an optimal mix of the two technologies. We present physical topology and node structure of the prototype.

The effective loop parameters of digital PLL based clock recovery schemes vary with the degree of impairments in the received signal. We present a novel scheme that guarantees stable PLL design parameters independently of input signal distortions.