Abstract
We propose a novel quasi-phase-matching scheme for achieving efficient
four-wave-mixing (FWM)-based wavelength conversion in the presence of a large
phase-mismatch. The scheme is based on respectively increasing and decreasing
the propagation lengths over which there is FWM gain and FWM loss by switching
between two different phase-mismatch values. We discuss how such a phase-mismatch
switching (PMS) approach can be optimized for wavelength conversion and show
that it can be realized in silicon-on-insulator strip waveguides by switching
adiabatically between two waveguide widths along the propagation path. By
means of numerical simulations we demonstrate that, for a pump wavelength
of 1550 nm, PMS wavelength converters can enable efficient conversion (> -23 dB) around
a target signal wavelength situated anywhere in the entire near-infrared wavelength
domain of 1300–1900 nm.
© 2013 IEEE
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