Travelling-wave resonant four-wave mixing breaks the limits of cavity-enhanced all-optical wavelength conversion

Francesco Morichetti, Antonio Canciamilla, Carlo Ferrari, Antonio Samarelli, Marc Sorel and Andrea Melloni ()
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Francesco Morichetti: Politecnico di Milano
Antonio Canciamilla: Politecnico di Milano
Carlo Ferrari: Politecnico di Milano
Antonio Samarelli: Electronics and Electrical Engineering, University of Glasgow
Marc Sorel: Electronics and Electrical Engineering, University of Glasgow
Andrea Melloni: Politecnico di Milano

Nature Communications, 2011, vol. 2, issue 1, 1-8

Abstract: Abstract Wave mixing inside optical resonators, while experiencing a large enhancement of the nonlinear interaction efficiency, suffers from strong bandwidth constraints, preventing its practical exploitation for processing broad-band signals. Here we show that such limits are overcome by the new concept of travelling-wave resonant four-wave mixing (FWM). This approach combines the efficiency enhancement provided by resonant propagation with a wide-band conversion process. Compared with conventional FWM in bare waveguides, it exhibits higher robustness against chromatic dispersion and propagation loss, while preserving transparency to modulation formats. Travelling-wave resonant FWM has been demonstrated in silicon-coupled ring resonators and was exploited to realize a 630-μm-long wavelength converter operating over a wavelength range wider than 60 nm and with 28-dB gain with respect to a bare waveguide of the same physical length. Full compatibility of the travelling-wave resonant FWM with optical signal processing applications has been demonstrated through signal retiming and reshaping at 10 Gb s−1

Date: 2011
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DOI: 10.1038/ncomms1294

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