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US 7,460,742 B2Granted
Method and apparatus for providing an antireflection coating on the output facet of a photonic integrated circuit (PIC) chip
AssigneeInfinera Corporation
InventorCharles H. Joyner
Life of this patent
Estimating the term…
Abstract
An on-chip photodiode is provided in a photonic integrated circuit (PIC) on a semiconductor chip to monitor or check for antireflection qualities of an AR coating applied to the front facet of the semiconductor chip.
Claims10
An integrated circuit chip comprising:
- a plurality of light sources provided on the chip, each of the plurality of light sources providing a corresponding one of a plurality of optical outputs at a respective one of a plurality of wavelengths;
- a photodiode provided on the chip;
- an optical combiner provided on the chip, the optical combiner having a plurality of inputs and an output, each of the plurality of light sources and the photodiode being coupled to a respective one of the plurality of inputs of the optical combiner, the output of the optical combiner supplying an output signal through to an output facet of the integrated circuit chip, the photodiode being configured to sense a portion of the output signal reflected by the output facet toward the optical combiner;
- and
- an antireflection coating provided on the output facet of the integrated circuit chip.
2 more elements
Dependencies are inferred from the claim text.