Our phase modulators cannot be used as amplitude/intensity modulators, voltage variable wave-plates or polarization rotators. There are a number of reasons for this limitation. Our Phase Modulators are configured using the same crystal orientation. The input polarizations aligned along the induced ray. In addition, our amplitude modulators use at least two crystals which are aligned along their x-axis. When building a phase modulator with multiple crystals the alignment the crystals are set in-line opposed to along the x-axis.