Authors:	H. Yu, M. Pantouvaki, P. Verheyen, G. Lepage, P. Absil, W. Bogaerts, J. Van Campenhout
Title:	Silicon dual-ring modulator driven by differential signal
Format:	International Journal
Publication date:	11/2014
Journal/Conference/Book:	Optics Letters
Volume(Issue):	p.6379-6381
DOI:	10.1364/OL.39.006379
Citations:	20 (Dimensions.ai - last update: 24/11/2024) Look up on Google Scholar
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Abstract

A silicon dual-ring modulator consisting of two serially cascaded rings with embedded PN junctions is driven by a differential signal pair. We show by simulation and experiment that the device has advantages over the single-ring modulator in terms of optical bandwidth, 3-dB modulation bandwidth and bit rate, at the expense of a 1.7-dB increase in the transmission penalty and a twofold increase of the RF power consumption. Driven by differential pseudo random binary sequence (PRBS) signals of 0.5-V peak-to-peak voltage (Vpp), the dual-ring modulator exhibits optical bandwidths of 66 pm and 40 pm at 12.5  Gb/s and 20  Gb/s, respectively. In contrast, the single-ring modulator has an optical bandwidth of 26 pm under a single-end PRBS signal of 0.5  Vpp at 12.5  Gb/s, and its eye diagram closes if the bit rate rises to 20  Gb/s.