Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1990-05-21
1994-05-31
Chilcot, Jr., Richard E.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359124, 359152, H04B 1024
Patent
active
053174402
ABSTRACT:
A single wavelength bidirectional communication link. The bidirectional communication link (100) includes an optical fiber (160) having a first and a second end. The present invention includes a first arrangement (260) for launching a first optical carrier of a first wavelength onto the optical fiber (160) at the first end thereof. Additionally, the first launching arrangement (260) impresses a first modulating signal having a frequency confined to a first frequency spectrum upon the first carrier. The inventive communication link (100) further includes a second arrangement (270) for launching a second optical carrier of the first wavelength onto the optical fiber (160) at the second end thereof. The second launching arrangement (270) also impresses a second modulating signal having a frequency confined to a second frequency spectrum not overlapping the first spectrum upon the second carrier. In addition, the present invention includes a first receiver (540), coupled to the second end of the optical fiber (160), for extracting the first modulating signal from the first optical carrier. A second receiver (480), coupled to the first end of the optical fiber (160), extracts the second modulating signal from the second optical carrier.
REFERENCES:
patent: 4912523 (1990-03-01), Refi et al.
patent: 4957339 (1990-09-01), Fussganger et al.
patent: 5005936 (1991-04-01), Hsu
7th European Conference on Optical Communiczation, ECOC 1981, Aug. 8, 1981 Denmark R. Ishikawa et al. `Bidirectional LED-Spectrum Division Multiplexing Data Link with high stability`.
Japanese Patent Abstract vol. 10, No. 186 Sumitomo Electric Ind. Ltd.
Japanese Patent Abstract vol. 9, No. 85 Fujitsu.
"Electrical Communication", vol. 55, No. 4, 1980, "Bidirectional Optical Link" by W. Koester, I. Mohr (pp. 342-349).
Brown Charles D.
Chilcot Jr. Richard E.
Denson-Low Wanda K.
Heald Randall M.
Hughes Aircraft Company
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