Optical communications – Receiver
Reexamination Certificate
2008-01-22
2008-01-22
Li, Shi K (Department: 2613)
Optical communications
Receiver
C398S204000
Reexamination Certificate
active
07321735
ABSTRACT:
A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated with information. The method converts an optical signal to electrical charge, accumulates the electrical charge, and periodically transfers the accumulated electrical charge to a storage device, whereby the periodically transferred electrical charge forms the electrical signals. An exemplary system includes an optical transducer and a universal frequency translator coupled to an output of the optical transducer. The optical transducer receives an optical signal and converts the optical signal to electrical charge. The universal frequency translator periodically transfers energy from the electrical charge and forms the electrical signals from the transferred energy. In an embodiment, the present invention converts an I and Q optical signal to electrical signals. In an embodiment, the present invention converts an optical signal to an RF electrical signal using relatively few components, while preserving information content.
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Bultman Michael J.
Cook Robert W.
Looke Richard C.
Moses, Jr. Charley D.
Rawlins Gregory S.
Li Shi K
ParkerVision, Inc.
Sterne Kessler Goldstein & Fox PLLC
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