METHOD AND APPARATUS FOR TRANSMISSION OF TWO MODULATED SIGNALS VIA AN OPTICAL CHANNEL
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United States of America Patent
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app pub date -
Oct 21, 2013
filing date -
Sep 22, 2008
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Abstract
A transmitter with two optical sources generates two optical carrier signals having different frequencies. The optical carrier signals are combined and divided in a first coupler and fed to carrier signal inputs of two modulators. The mixed carrier signals are separately modulated by two modulation signals (a(t)) and (b(t)) and the modulated signals are combined in a first combiner and emitted as transmission signal. Only one demodulator is necessary to regain the modulation signals (a(t) and b(t)).
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