400-Gb/s Single-Photodiode Polarization-Agnostic Kramers–Kronig Reception of Distributedly Aggregated Superchannel

In its most simple implementation, the Kramers-Kronig (KK) scheme allows the reception of complex modulation formats with a single photodiode. Thereby, in analogy to a heterodyne receiver, an additional continuous wave signal is used that allows under certain conditions the distortion-free reconstruction of the data signal. We present experimental investigations on a novel KK scheme based on inher...