Optical Spectrally Sliced Transmitter for High Fidelity and Bandwidth Scalable Waveform Generation

摘要

This paper presents a single-carrier optical coherent transmitter that synthesizes high-fidelity waveforms from spectral slices with the state-of-the-art electrical drivers. The synthesis technique overcomes the electronic speed bottlenecks and produces an optical waveform bandwidth that is times the electrical bandwidths. Using two 32 GHz slices, we synthesized and transmitted a 60-GBd polarization-division multiplexed, quadrature phase-shift keying (PDM-QPSK) waveform over 4480 km with a Q-factor of 8.71 dB. To demonstrate high-fidelity waveform synthesis, we generated a 60-GBd PDM 16-QAM and observed a 2.5-dB implementation penalty at BER of 1×10. To address scalability, we also developed the phase mismatch compensation algorithm for the transmitter that uses photonic integrated circuits.