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We experimentally demonstrate a 25.5-Gb/s OFDM transmission over 200-m OMI MMF with a modulation bandwidth of 4.25 GHz, by using mode group diversity multiplexing. The power penalty induced by inter-channel crosstalk is only 0.5 dB.
We demonstrate the first OFDMA uplink transmission with four individually modulated ONUs with central distribution of the optical carrier and coherent reception at the OLT, showing that OFDMA-PON is viable.
We present a theory for Raman amplification in few-mode fibers based on the real (non LP) waveguide modes of the fiber. The condition for minimal mode-dependent gain is analyzed and reported for a few-mode fiber supporting 12 polarization- and spatial modes. The results are in agreement with recent experimental demonstrations.
We introduce a new concept of OFDM transmission with constant envelope and coherent detection to reduce the sensitivity of OFDM signals to nonlinear effects and phase noise.
Space-Division Multiplexing for long distance transmission over multi-mode fibers requires mode-multiplexers with high mode selectivity and capable of exciting all fiber modes in a controlled way. We present an architecture for mode-multiplexers and its experimental demonstration for a three mode fiber.
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