Multiband Silicon Photonic ePIC Coherent Receiver for 64 GBd QPSK

Multiband coherent communication is being handled as a promising candidate to address the increasing demand for higher data rates and capacity. At the same time, coherent communication is expected to enter the data center domain in the near future. With coherent data links in both, data- and telecom, spanning multiple optical bands, novel approaches to coherent transceiver design and traffic engineering will become a necessity. In this work, we present a monolithically integrated silicon photonic coherent receiver for O- and C-band. The receiver features a 2 x 2 multi-mode interference coupler network as 90 degrees hybrid optimized for 1430 run (E-band). The total power consumption is 460 mW at a footprint of approximately 6 mm(2), and an opto-electrical bandwidth of 33 GHz. 64 GBd operation is demonstrated in O-and C-band, which is competitive to the state-of-the-art for silicon photonic coherent receiver in the C band, and the highest symbol rate to date for 0-band coherent communication.

Automated summary

Multiband coherent communication is regarded as a promising solution to meet the increasing demand for higher data rates and capacity, and it is expected to enter the data center domain soon. In this paper, a monolithically integrated silicon photonic coherent receiver for O- and C-band is proposed, featuring low power consumption and high opto-electrical bandwidth. It achieves high symbol rates in both O- and C-band.