A Minimal Coherent Receiver for 200 Gb/s/λ PON Downstream With Measured 29 dB Power Budget

作者：Istvan Bence Kovacs, Md. Saifuddin Faruk, Seb J. Savory · 发表于：IEEE Photonics Technology Letters · 年份：2023 · DOI：10.1109/lpt.2023.3238666 · 被引用次数：27 · 研究领域：Optical Network Technologies、Advanced Photonic Communication Systems、Photonic and Optical Devices

We experimentally demonstrate 200 Gb/s/$\lambda $downstream transmission for a passive optical network (PON) with a minimal coherent receiver at optical network unit (ONU). The low complexity receiver required at the cost-sensitive ONU employs heterodyne detection and requires a single photodiode, a 3-dB optical coupler and a local oscillator, and is the simplest coherent receiver. At the optical line terminal (OLT), digital pre-emphasis and Alamouti-coding is applied to the 50 GBaud signal. A power budget of 29 dB is experimentally demonstrated, increasing to 34.5 dB if a balanced receiver is utilized.