Interchannel cross talk caused by pump depletion in periodically poled LiNbO3 waveguide wavelength converters

We study experimentally and theoretically the limits of multichannel parametric wavelength conversion imposed by pump depletion in periodically poled LiNbO3 waveguides. As many as 55 channels with 6 dBm of power each can be converted simultaneously with less than a 10^-9 error rate by use of 20 dBm of pump power.