Photonic crystal interferometer
First Claim
Patent Images
1. A sensor apparatus comprising:
- a photonic crystal structure optically coupled to a laser, said structure comprising;
a beam splitter;
an interferometer having a reference arm and a sensor arm, said reference arm and said sensor arm optically coupled to said beam splitter;
a first output configured to be optically coupled to a bright port photodetector and said beam splitter;
a second output configured to be optically coupled to a dark port photodetector and said beam splitter; and
a photonic crystal mirror optically coupled to said photonic crystal structure, said photonic crystal mirror positioned to reflect light propagating in a first direction of said reference arm into a direction generally opposite said first direction in said reference arm and reflect light propagating in a second direction of said sensor arm into a direction generally opposite said second direction in said sensor arm.
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Abstract
A sensor apparatus comprising a photonic crystal structure optically coupled to a laser, the photonic crystal structure comprising a beam splitter, an interferometer having a reference arm and a sensor arm, a first output configured to be optically coupled to a bright port photodetector, and a second output configured to be optically coupled to a dark port photodetector.
22 Citations
17 Claims
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1. A sensor apparatus comprising:
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a photonic crystal structure optically coupled to a laser, said structure comprising; a beam splitter; an interferometer having a reference arm and a sensor arm, said reference arm and said sensor arm optically coupled to said beam splitter; a first output configured to be optically coupled to a bright port photodetector and said beam splitter; a second output configured to be optically coupled to a dark port photodetector and said beam splitter; and a photonic crystal mirror optically coupled to said photonic crystal structure, said photonic crystal mirror positioned to reflect light propagating in a first direction of said reference arm into a direction generally opposite said first direction in said reference arm and reflect light propagating in a second direction of said sensor arm into a direction generally opposite said second direction in said sensor arm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for sensing comprising:
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providing a laser input to a photonic crystal structure having a sensed medium region; supplying an analyte in said sensed medium region; transmitting said laser input through said sensed medium; reflecting said laser input off of a photonic crystal mirror to transmit said laser input back through said sensed medium and into a first output and a second output of said photonic crystal structure; and detecting said analyte by measuring said first output and said second output of said photonic crystal structure. - View Dependent Claims (13, 14, 15)
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16. A sensor apparatus comprising:
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means for generating a laser input to a photonic crystal structure having a sensed medium region containing an analyte; means for transmitting said laser input through said sensed mediurm means for reflecting said laser input back through said sensed medium region into a first output and a second output of said photonic crystal structure; and means for detecting said analyte by measuring said first output and said second output of said photonic crystal structure. - View Dependent Claims (17)
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Specification