Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1993-09-28
1994-12-27
Chilcot, Jr., Richard E.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359122, 359124, 359145, 359173, 379 56, 455101, H04B 1000, H04J 1402
Patent
active
053770358
ABSTRACT:
A single transmission optical fiber is used to transmit RF signals of the same frequency but different polarization from a source to a polarization diversity receiver without introducing interference between the signals. The incoming signal of one polarization modulates a first laser transmitter operating at one wavelength, and the incoming signal of the other polarization modulates a second laser transmitter operating at a different, second wavelength. The two modulated optical beams are combined in an optical coupler whose output is connected to the transmission fiber leading to the polarization diversity receiver. At the receiver, a wavelength division multiplexing coupler is used to separate out the two modulated optical carriers. The two RF signals used to modulate the laser transmitters are separately recovered via photodiode detectors to provide inputs to the polarization diversity receiver.
REFERENCES:
patent: 4545075 (1985-10-01), Miller et al.
patent: 5251053 (1993-10-01), Heidemann
"Transmission Systems for Communication" by Members of the Technical Staff, Bell Telephone Laboratories, Bell Telephone Laboratories, Inc. 1970, pp. 124-139.
Ng Willie W.
Tangonan Gregory L.
Wang Harry T.
Chilcot Jr. Richard E.
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
Negash Kinfe-Michael
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