Waveguide mode stripper for integrated optical components
AssigneeNortel Networks Limited
InventorsIan B. Betty, Maxime Poirier
Life of this patent
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Abstract
Through the introduction of an imaging multimode interference device in an integrated optical circuit, such performance degradations as lateral waveguide field oscillations and backreflections may be suppressed. The suppression of lateral waveguide field oscillations (that may occur due to misaligned optical coupling), in particular, can significantly reduce variations in the power splitting ratio of an optical power splitting structure, such as those employed by a Mach-Zehnder modulator.
Claims16
An integrated optical circuit comprising:
- an input waveguide;
- an imaging multimode interference device adapted to substantially remove all modes but a fundamental mode of an optical signal received from said input waveguide;
- and
- an optical power splitter structure in optical communication with said imaging multimode interference device.
A method for suppressing propagating lateral waveguide field oscillations at the input of an optical power splitter structure comprising fabricating an imaging multimode interference device in optical communication with said optical power splitter structure.
An integrated optical circuit comprising an imaging multimode interference device in optical communication with an optical power splitting structure.
An integrated optical circuit comprising:
- a semiconductor optical amplifier having an angled output;
- and
- an imaging multimode interference device between said semiconductor optical amplifier and said angled output.
An integrated optical circuit comprising:
- a waveguide device having an angled output;
- and
- an imaging multimode interference device between said waveguide device and said angled output.
Use of an imaging multimode interference device as an optical mode stripper in an integrated optical circuit.
Use of an imaging multimode interference device to substantially remove all modes but a fundamental mode of an optical signal received at an input to said multimode interference device.
A semiconductor optical amplifier comprising:
- an imaging multimode interference device adapted to substantially remove all modes but a fundamental mode of an optical signal received from an input waveguide;
- and
- an electrode in contact with said multimode interference device adapted to change the optical properties of said multimode interference device through application of an electrical signal.
An optical attenuator comprising:
- an input waveguide;
- an imaging multimode interference device adapted to substantially remove all modes but a fundamental mode of an optical signal received from said input waveguide;
- and
- an electrode adapted to apply a bias voltage to a surface of said imaging multimode interference device.
Dependencies are inferred from the claim text.