US Patent 10488683 Traveling wave modulator

In an embodiment, an optical modulator comprising an optical path having at least one optical waveguide, and an impedance formed along the optical path, wherein the impedance comprises a capacitance that increases along the optical path. In another embodiment, a method for increasing bandwidth of an optical modulator by applying a first voltage applied to a beginning of a resistive line. and applying a second voltage applied to an end of the resistive line; wherein the first voltage is less than the second voltage.