Optical Modulator Module

An optical modulator module for modulating an optical signal with an electrical signal, the module comprising:

• a Mach-Zehnder modulator chip including an electrode pair as an electrical signal transmission line and an optical waveguide as an optical signal waveguide;
• a driver IC electrically connected to a first end portion of the electrode pair;
• and
• a terminator electrically connected to a second end portion of the electrode pair, wherein the terminator comprises:
• a substrate;
• a first signal electrode on the substrate and connected to a first electrode of the electrode pair;
• a second signal electrode on the substrate and connected to a second electrode of the electrode pair;
• a midpoint electrode on the substrate between the first signal electrode and the second signal electrode;
• a first resistor on the substrate and connected between the first signal electrode and the midpoint electrode;
• a second resistor on the substrate and connected between the second signal electrode and the midpoint electrode;
• a first GND electrode on the substrate on a side opposite the first resistor with the first signal electrode interposed therebetween;
• and
• a second GND electrode on the substrate on a side opposite the second resistor with the second signal electrode interposed therebetween.

A terminator for inclusion in an optical modulator module for modulating an optical signal with an electrical signal, the terminator comprising:

• a substrate;
• a first signal electrode on the substrate and configured to be connected to a first electrode of an electrode pair of a Mach-Zehnder modulator chip;
• a second signal electrode on the substrate and configured to be connected to a second electrode of the electrode pair of the Mach-Zehnder modulator chip;
• a midpoint electrode on the substrate between the first signal electrode and the second signal electrode;
• a first resistor on the substrate and connected between the first signal electrode and the midpoint electrode;
• a second resistor on the substrate and connected between the second signal electrode and the midpoint electrode;
• a first GND electrode on the substrate on a side opposite the first resistor with the first signal electrode interposed therebetween;
• and
• a second GND electrode on the substrate on a side opposite the second resistor with the second signal electrode interposed therebetween.

A method for providing an optical modulator module for modulating an optical signal with an electrical signal, the method comprising:

• providing a Mach-Zehnder modulator chip including an electrode pair serving as an electrical signal transmission line and an optical waveguide serving as an optical signal waveguide;
• electrically connecting a driver IC to a first end portion of the electrode pair;
• and
• providing a terminator electrically connected to a second end portion of the electrode pair, wherein providing the terminator comprises:
• providing a substrate;
• providing a first signal electrode on the substrate and connected to a first electrode of the electrode pair;
• providing a second signal electrode on the substrate and connected to a second electrode of the electrode pair;
• providing a midpoint electrode on the substrate between the first signal electrode and the second signal electrode;
• providing a first resistor on the substrate and connected between the first signal electrode and the midpoint electrode;
• providing a second resistor on the substrate and connected between the second signal electrode and the midpoint electrode;
• providing a first GND electrode on the substrate on a side opposite the first resistor with the first signal electrode interposed therebetween;
• and
• providing a second GND electrode on the substrate on a side opposite the second resistor with the second signal electrode interposed therebetween.