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We propose a quasi-single-mode transmission scheme using hybrid few-mode-fiber (FMF) and single-mode-fiber (SMF) span with Raman amplification for CO-OFDM system. No multi-path interference (MPI) compensation algorithm is used
Optical OFDM transmission with phase modulation and direct detection (PMDD) is verified by theoretical derivation and simulation. 26.12-Gb/s PMDD 16QAM-OFDM achieves comparable performance to single sideband IMDD 16QAM-OFDM with half of the optical modulation index.
We experimentally demonstrated a RSOA based DDO-OFDM system using CAZAC precoding. Adaptive modulation has been simply and efficiently performed after CAZAC precoding to improve the sensitivity and overall data rate thanks to the equalized SNR.
We apply the signal- and channel-independent constant amplitude zero autocorrelation sequence (CAZAC) precoding technique to a bandwidth-limited longer-reach DDO-OFDM system, and propose a simplified adaptive modulation scheme according to the equalized SNR per subcarrier after CAZAC precoding. Simulation results show that with the optimized modulation index, conventional 8.23-Gb/s double sideband...
50Km SSMF optical direct-detected OFDM transmission with Constant Amplitude Zero Auto Correlation Sequence (CAZAC) equalization is experimentally demonstrated with over 15dB power budget. 2.5dB enhancement in sensitivity has been achieved simultaneously with 3dB PAPR suppression.
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