Patent ID: 9140957
Filing Date: 2015-09-22
Classification: G02F

Abstract:
1. An electro-optic Mach-Zehnder modulator arrangement, comprising a first optical waveguide forming a first arm of the Mach-Zehnder modulator; a second optical waveguide forming a second arm of the Mach-Zehnder modulator; an electrode arrangement comprising at least one first waveguide electrode and at least one second waveguide electrode arranged on top of a capacitive segment of the first and the second optical waveguide, respectively, such that a voltage can be applied across the capacitive segments of the first and second optical waveguide; at least one driver unit for supplying a voltage to the electrode arrangement, the driver unit comprising at least a first output port coupled to the first waveguide electrodes and a second output port coupled to the second waveguide electrodes, wherein the driver unit is configured to supply a first varying signal to the first waveguide electrodes via the first output port and to supply a second varying signal to the second waveguide electrodes via the second output port; and a non-grounded conductive region via which the capacitive segment of the first optical waveguide is connected to the capacitive segment of the second optical waveguide such that the first and second waveguide electrodes are capacitively coupled to one another; a DC-source connected to the first and/or the second waveguide electrode and the non-grounded conductive region for supplying a bias voltage across the capacitive segments of the optical waveguides, wherein the DC-source is connected to the first and the second waveguide electrode via a connecting point located between two terminating resistors coupled between the first and the second waveguide electrode such that the DC voltage is symmetrically supplied to the capacitive segments, or the electrode arrangement comprises a plurality of first waveguide electrodes and a plurality of second waveguide electrodes and a plurality of driver units, wherein each one of the driver units is assigned to one first waveguide electrode and one second waveguide electrode, wherein the DC-source is connected to the non-grounded conductive region and ground.