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US 10,018,786 B2Granted
Resonator and optical sensor using the same for detecting a beating signal caused by interference of two output beams from first and second resonators
AssigneeElectronics and Telecommunications Research Institute
InventorsKwang Ryong Oh, Hong-Seung Kim
Life of this patent
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Abstract
There is provided a semi-circular resonator using a whispering gallery mode (WGM) and an optical sensor using the same. Accordingly, an active region that is a waveguide of an active layer in which laser oscillation is caused by gains of advancing beams is deeply etched in a semi-circular or semi-ring shape.
Claims13
An optical sensor comprising:
- first and second resonators each formed to have a shape in which a waveguide is etched in a semi-circular or semi-ring shape from a section thereof;
- an optical detector for detecting a beating signal caused by interference of two output beams output from the first and second resonators;
- and
- a lens for refracting the two output beams, thereby outputting two parallel beams.
1 more element
An optical sensor comprising:
- first and second resonators each formed to have a shape in which a waveguide is etched in a semi-circular or semi-ring shape from a section thereof;
- an optical detector for detecting a beating signal caused by interference of two output beams output from the first and second resonators;
- two DBRs integrated with the section to receive two output beams;
- and
- a coupler for coupling beams output from the two DBRs, thereby outputting the beating signal.
2 more elements
Dependencies are inferred from the claim text.