Direct Demodulation of Optical BPSK/QPSK Signals without Digital Signal Processing

H. T. Thuy, S. D. Sun

Direct Demodulation of Optical BPSK/QPSK Signals without Digital Signal Processing

Číslo: 4/2018
Periodikum: Radioengineering Journal
DOI: 10.13164/re.2018.0942

Klíčová slova: Phase noise, BPSK, QPSK, coherent detection, coherent optical communication

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Anotace: We experimentally demonstrate the coherent detection of 5-Gbd/s BPSK/QPSK signal by direct phase compensation of the phase noise without using a sophisticated digital signal processing algorithm. The phase compensation is achieved by applying simply an error signal to a phase modulator located at the local oscillator for coherent detection, where the error signal is generated to keep the same power level for binary or quadrature signal.