Mach-Zehnder optical modulator including multi-mode interferer
AssigneeElectronics and Telecommunications Research Institute
InventorsJaegyu Park, Sungil Kim, Kisoo Kim
Life of this patent
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Abstract
Provided is a Mach-Zehnder optical modulator. The optical modulator thereof includes an input waveguide on one side of a substrate, an output waveguide on the other side of the substrate, an optical power splitter between the input waveguide and the output waveguide, an optical power combiner between the optical power splitter and the output waveguide, branch waveguides between the optical power splitter and the optical power combiner, and electrodes provided on the outer periphery of the branch waveguides and between the branch waveguides, and multi-mode interferers provided between the electrodes, and connected in series to the branch waveguides.
Claims16
A Mach-Zehnder optical modulator comprising:
- an input waveguide provided on one side of a substrate;
- an output waveguide provided on the other side of the substrate;
- an optical power splitter provided between the input waveguide and the output waveguide;
- an optical power combiner provided between the optical power splitter and the output waveguide;
- branch waveguides connected between the optical power splitter and the optical power combiner;
- multi-mode interferers connected in series to the branch waveguides;
- electrodes provided on the outer periphery of the branch waveguides and between the branch waveguides;
- gratings provided between the multi-mode interferers and the electrodes;
- and
- auxiliary waveguides provided between the gratings and the electrodes,
- wherein the electrodes have a separation distance less than a width of the multi-mode interferers.
A Mach-Zehnder optical modulator comprising:
- a substrate;
- a slab waveguide layer on the substrate;
- and
- a rib waveguide layer on the slab waveguide layer, wherein the rib waveguide layer includes:
- an input waveguide provided on one side of the substrate;
- an output waveguide provided on the other side of the substrate;
- an optical power splitter provided between the input waveguide and the output waveguide;
- an optical power combiner provided between the optical power splitter and the output waveguide;
- branch waveguides connected between the optical power splitter and the optical power combiner;
- multi-mode interferers connected in series to the branch waveguides;
- electrodes provided between the branch waveguides;
- gratings provided between the multi-mode interferers and the electrodes;
- and
- auxiliary waveguides provided between the gratings and the electrodes,
- wherein the multi-mode interferers have a width greater than a separation distance between the electrodes.
Dependencies are inferred from the claim text.