Dual-polarization fiber optic communications link
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United States of America Patent
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Jun 13, 1995
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N/A
app pub date -
Sep 23, 1993
filing date -
Sep 23, 1993
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Abstract
A dual-polarization fiber optic communications link comprising a dual polarization light source for emitting a monochromatic lightwave having two polarizations, a polarization splitting coupler for separating the polarizations of the lightwave into a carrier signal and a standard signal, an optical modulator employing the carrier signal and an information signal to produce a double-sideband suppressed carrier signal with the polarization of the carrier, an optical signal combiner for combining the double-sideband suppressed carrier having one polarization with the lightwave standard having a different polarization, said combination occurring substantially without interaction between the respective signals, and the combined signals being coupled to a fiber optic transmission medium. The communications link permits greater modulation dynamic range than conventional amplitude-modulated optical communications links.
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