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FWM-based wavelength conversion of 40 Gbaud PSK signals in a silicon germanium waveguide
Mohamed A Ettabib1, Kamal Hammani, Francesca Parmigiani
1Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.
Optics Express
|August 14, 2013
Abstract:
We demonstrate four wave mixing (FWM) based wavelength conversion of 40 Gbaud differential phase shift keyed (DPSK) and quadrature phase shift keyed (QPSK) signals in a 2.5 cm long silicon germanium waveguide. For a 290 mW pump power, bit error ratio (BER) measurements show approximately a 2-dB power penalty in both cases of DPSK (measured at a BER of 10(-9)) and QPSK (at a BER of 10(-3)) signals that we examined.
