Spatially distributed aggregation of a polarization-division multiplexed superchannel by frequency conversion in fiber
We extend our concept for distributed ultra-dense frequency-division multiplex of single-polarization subcarriers to multiplex of polarization-division multiplexed (PDM) subcarriers. Precise frequency allocation of PDM subcarriers within a 400-Gb/s superchannel is experimentally validated with Nyquist-shaped PDM-QPSK subcarriers.