Compensation of modal dispersion in optical waveguides
AssigneeGeorgia Tech Research Corporation
InventorsStephen E. Ralph, Ketan Patel
Life of this patent
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Abstract
Methods for detecting and compensating for multiple optical signals produced in a multi-mode fiber system are provided. A representative method includes detecting a plurality of optical signals radiating from an end of the multi-mode fiber by a multisegment photodetector having different detector regions that detect different portions of the plurality of optical signals, and modifying detected signal by the multisegment photodetector to reduce the affects of modal dispersion among the plurality of optical signals. Other methods also are provided.
Claims30
A method for detecting and correcting for modal dispersion in a multi-mode fiber optic system having an optical signal coupled into a multi-mode fiber, comprising:
- detecting a plurality of optical signals radiating from an end of the multi-mode fiber by a multisegment photodetector having different detector regions that detect different portions of the plurality of optical signals;
- and
- modifying detected signals by the multisegment photodetector to reduce effects of modal dispersion among the plurality of optical signals.
A method for detection and compensation of multimodes produced from a multimode optical fiber system, comprising:
- converting an input electrical signal to an optical signal;
- launching an optical signal into a multimode fiber;
- positioning a photodetection system at an end of the multimode fiber to receive a plurality of optical signals exiting the multimode fiber;
- detecting the multiple optical signals by multiple detectors of the photodetection system producing detected electrical signals;
- modifying the detected electrical signals;
- and
- adding together the detected electrical signals to generate an output electrical signal corresponding to the input electrical signal.
A method for detecting and correcting for dispersion in an optical fiber system, comprising:
- detecting optical signals radiating from an end of an optical fiber by a multisegment photodetector having a plurality of detection zones for detecting the optical signals, the detection zones positioned adjacent to one another and arranged in a coplanar, annular configuration.
Dependencies are inferred from the claim text.