Multiple channel wavelength conversion using engineered quasi-phasematching structures in LiNbO3 waveguides

We report difference frequency generation–based wavelength converters with multiple phase-matching wavelengths that use engineered quasi-phase-matching structures in LiNbO3 waveguides. Multiple-channel wavelength conversion is demonstrated within the 1.5-μm band and between the 1.3- and 1.5-μm bands. With simultaneous use of M pump wavelengths, these devices can also be used to perform wavelength broadcasting, in which each of N input signals is converted into M output wavelengths.