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We experimentally demonstrate the wireless transmission of optically generated DPSK signals based on heterodyne detection with high receiver sensitivity. Using this scheme, an approach to deliver two DPSK channels is proposed for FDM application.
A novel QAM coherent subcarrier multiplexing system which is based on heterodyne detection is proposed and demonstrated experimentally. At the transmitter side, intermediate frequency carrier modulation which is used for subcarrier enables demodulation of QAM with heterodyne detection. The experiment and theoretical simulation show that the coherent optical system operating for multi-channel using...
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