Abstract
We demonstrate that an optical carrier can be extracted from a signal based on a blockwise phase-switching (BPS) technique for locking the frequency combs at the transmitter and the receiver in a wavelength division multiplexing (WDM) system. Two types of carrier regeneration techniques, optical injection locking and stimulated Brillouin scattering, are evaluated in the aspects of the injection ratio and pump power, respectively, under different carrier-to-signal power ratios. QPSK data channels with 25 GHz spacing are successfully transmitted over an 80 km fiber by the direct detection of a BPS-assisted central channel and coherent detection of the remaining channels.
© 2018 Optical Society of America
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