AI Article Synopsis

  • The proposed scheme uses photo-mixing on a photo-detector with Nyquist LO pulses to efficiently demultiplex coherent Nyquist TDM signals.
  • It leverages time-domain orthogonality of Nyquist pulses to achieve high signal-to-noise ratio (SNR) demultiplexing and homodyne detection, even when pulses overlap significantly.
  • Experimental results show that this approach outperforms traditional ultrafast all-optical sampling methods, demonstrating effective demultiplexing of 80 Gbaud, 64 QAM Nyquist pulse OTDM signals with a simpler setup.

Article Abstract

We propose a simple and high-performance scheme for demultiplexing coherent Nyquist TDM signals by photo-mixing on a photo-detector with Nyquist LO pulses. This scheme takes advantage of the time-domain orthogonality of Nyquist pulses, which enables high-SNR demultiplexing and homodyne detection simultaneously in spite of a strong overlap with adjacent pulses in the time domain. The feasibility of this scheme is demonstrated through a demultiplexing experiment employing 80 Gbaud, 64 QAM Nyquist pulse OTDM signals. This scheme exhibits excellent demultiplexing performance with a much simpler configuration than a conventional ultrafast all-optical sampling scheme.

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http://dx.doi.org/10.1364/OE.22.029456DOI Listing

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