Wavelength division multiplexed fiber optic link for RF polarization diversity receiver
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United States of America Patent
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Dec 27, 1994
Grant Date -
N/A
app pub date -
Sep 28, 1993
filing date -
Sep 28, 1993
priority date (Note) -
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status (Latency Note)
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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.
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