Abstract

A spectrally sliced heterodyne coherent receiver (SHCR) employing four balanced photodetectors and analog-to-digital converters with half of the signal bandwidth is proposed to complete the signal reception and field recovery. We first numerically characterize the performance of SHCR compared with an intradyne coherent receiver and then validate the principle of the SHCR in a proof-of-concept single-polarization experiment. A 60 GBaud 16-quadrature amplitude modulation transmission is experimentally demonstrated over 80 km standard single-mode fiber with a bit-error-rate of 8.5×10⁻⁴ below the 7% hard-decision forward error correction threshold of 3.8×10⁻³. The SHCR offers a low-cost, hybrid-free, and channel-skew-tolerant candidate for data center interconnects.

© 2022 Chinese Laser Press

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