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We experimentally demonstrate the bandwidth enhancement of wavelength conversion in a silicon waveguide based on four-wave mixing (FWM) with two continuous-wave pumps. Our measurement results show 25% bandwidth improvement from 29.8 nm to 37.4 nm in a 17-mm-long silicon waveguide with a pump spacing of 14.9 nm as compared to a single-pump FWM. The experimental results are verified by theoretical calculations and &gt;40% bandwidth enhancement is predicted by further wavelength separation of the two pumps.

Experimental demonstration of bandwidth enhancement based on two-pump wavelength conversion in a silicon waveguide