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. 2014 Aug 21;4:6156. doi: 10.1038/srep06156

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All optical Nyquist pulse can be generated by a frequency-locked comb source cascaded with a band-pass filter. The high-order formats modulation is realized by inphase and quadrature (I and Q) signal modulation; Nyquist signal generation can be realized by time-domain multiplexing; Full-band signal coherent detection and digital signal processing can be realized by a common coherent detection setup.