Heterogeneous integrated coherent receiver based on wafer-scale indium phosphide-lithium niobate integrated platform

Abstract

A heterogeneous integrated coherent receiver based on a wafer-scale indium phosphide (InP)-lithium niobate integrated platform is provided and includes an on-chip 2×4 90° optical hybrid coupler and a pair of heterogeneous integrated balanced photodetectors (BPDs). The on-chip 2×4 90° optical hybrid coupler includes a 2×4 multimode interference (MMI) coupler based on symmetrical interference and a 2×2 MMI coupler based on general interference. Each BPD demonstrates a 3 dB bandwidth of 60 GHz and a common mode rejection ratio greater than 20 dB. The heterogeneous integrated coherent receiver has a wide balanced detection bandwidth of 60 GHz and low power consumption of 9.6 fJ/bit, supports data reception of 600 Gbit/s/Pol per channel. This heterogeneous integrated coherent receiver has the characteristics of a record high bandwidth, ultra-low power consumption and ultra-large capacity, which surpasses all other integrated optical coherent receivers shown so far.

Dependencies are inferred from the claim text.