An electro-optic waveguide device that includes an electro-optic polymer core having a refractive index and an electro-optic first polymer clad in proximity to the electro-optic polymer core. Initially, a cavity is formed into a first side of a handling wafer, with a sidewall of the cavity forming a first angle greater than about 54. The signaling pulse waveforms are designed to insure that their power spectral densities, after any frequency translation to the center of an operating band, are essentially spectrally disjoint with frequencies that must be protected. In presenting the chords, CPU 31 presents the chords converted with the use of the chord conversion table.