220-GBd optical coherent waveform generation using temporal unitary transforms
arXiv:2606.17226
Abstract
We use temporal unitary transforms to generate 16-QAM up to 220 GBd using only 50-GHz electrical bandwidth. The technique is theoretically lossless and can generate arbitrary optical waveforms beyond the bandwidth of the constituent modulators.
4 pages, 3 figures. Accepted for 2026 European Conference on Optical Communications (ECOC)