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Demonstration of wavelength conversion at 40 Gb/s data rate in silicon waveguides

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Abstract

We report an efficient wavelength conversion via four-wavemixing in reverse biased silicon-on-isolator p-i-n rib waveguides and demonstrate, for the first time, the conversion of a high-speed optical pseudo-random bit sequence data at 40 Gb/s. Results give a wavelength conversion efficiency of -8.6dB using a 8cm long waveguide with clear open eye on the wavelength converted signal. Conversion efficiency as functions of pump power and bias voltages has also been investigated. We show a slope efficiency close to 2 as predicted by theory.

©2006 Optical Society of America

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Figures (4)

Fig. 1.
Fig. 1. Schematic of the experimental setup for 40 Gb/s wavelength conversion experiment
Fig. 2.
Fig. 2. Spectrum of the output beam from an 8-cm long waveguide. Coupled pump power is 450 mW, and the conversion efficiency in this example is -8.6 dB. Clear 40GHz sidebands can be seen both from the input and converted signal.
Fig. 3.
Fig. 3. Wavelength conversion efficiency as a function of pump power coupled into the waveguide for an 8 cm long double S-bend waveguide at different bias voltages. The dashed line indicates a theoretical FWM efficiency ignoring nonlinear losses.
Fig. 4.
Fig. 4. Eye diagrams of the converted (right) signal in comparison with input (left) signal at 40Gb/s
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