A pulsed mid-infrared pump at is used to demonstrate wideband optical parametric gain in a low-loss long silicon photonic wire. Using dispersion engineering to obtain negative second-order () and positive fourth-order () dispersion, we generate broadband modulation instability and parametric fluorescence extending from . Using a cw probe signal to interrogate the modulation instability spectrum, we demonstrate parametric amplification with an on-chip gain bandwidth wider than , as well as narrowband Raman-assisted peak gain .
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