Simple single-laser coherent transceiver based on low-cost D-EML for edge networks

In this work we demonstrate single-laser, D-EML based coherent transceivers which transmit and simultaneously receive optical single sideband modulations through a phase noise cancelling scheme, leading to phase-noise and frequency-detuning clean signals. We use QPSK and 16-QAM modulations over a 500 Mbaud signal, reaching 1 Gbps and 2 Gbps respectively, with sensitivities as low as -53 and -40 dBm with unmodulated local oscillator, respectively, and -35 dBm for QPSK with modulated local oscillator, achieving high sensitivity coherent UD-WDM for analog radio over fiber and mobile fronthaul over passive optical networks.
This work was supported in part by the Spanish Ministry of Science and Innovation, Versatile Optical Coherent Network (VERSONET), under Grant RTI2018-097051; and in part by the European Union’s Horizon Europe Research and Innovation Programme under the Marie Sklodowska-Curie Grant, enabling virtualized wireless and optical coexistence (EWOC), under Agreement 101073265. (Corresponding author: Miquel Masanas.)
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