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Opt Express. 2009 Mar 2;17(5):3514-20.

Dispersion engineered As(2)S(3) planar waveguides for broadband four-wave mixing based wavelength conversion of 40 Gb/s signals.

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Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), IPOS, School of Physics, University of Sydney, NSW 2006, Australia.


We demonstrate broadband wavelength conversion of a 40 Gb/s return-to-zero signal using four-wave-mixing (FWM) in a dispersion engineered chalcogenide glass waveguide. The 6 cm long planar rib waveguide 2 mum wide was fabricated in a 0.87 mum thick film etched 350nm deep to correspond to a design where waveguide dispersion offsets the material leading to near-zero dispersion in the C-band and broadband phase matched FWM. The reduced dimensions also enhance the nonlinear coefficient to 9800 W(-1)km(-1) at 1550 nm enabling broadband conversion in a shorter device. In this work, we demonstrate 80 nm wavelength conversions with 1.65 dB of power penalty at a bit-error rate of 10(-9). Spectral measurements and simulations indicate extended broadband operation is possible.

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