2-μm-band Coherent Transmission of Nyquist-WDM 16-QAM Signal by On-chip Spectral Translation

We propose and demonstrate the first low-latency 2-μm-band coherent N-WDM transmission by on-chip spectral translation of 4×32-Gbaud 16-QAM signals with 33-GHz spacing. 318.25 Gbit/s net-rate is achieved with error-free performance after 1.15-km hollow-core fiber transmission.