On the Theory and Errata to “Data Transfer From RZ-OOK to RZ-BPSK by Polarization-Insensitive XPM in a Passive Birefringent Nonlinear AlGaAs Waveguide”

The dependence of the nonlinear coefficients on the transverse profiles of the pump and the probe fields, which is especially important for a highly anisotropic device such as the Al_0.18Ga_0.82As waveguide, was not explicitly stated in our paper “Data transfer from RZ-OOK to RZ-BPSK by polarization-insensitive XPM in a passive birefringent nonlinear AlGaAs waveguide.” The four-wave mixing efficiency was also incorrectly presented to depend on the square of the device physical length. Lastly, the influence of the fiber-waveguide coupling coefficient was neglected with insufficient justification, leading to an inaccurate general expression for the detected voltage.