Work

Shared LO-based self-coherent 16QAM transmission with PTBC for cost-sensitive metro networks

Year: 2025

Type: article

Abstract: We propose a cost-effective architecture for > 100-Gb/s metro networks with an 80-km reach, utilizing Alamouti polarization-time block code (PTBC), a self-coherent scheme, and a shared-local oscillator (LO) configuration. The combination of PTBC and the self-coherent scheme enables the use of a single-polarization coherent receiver without carrier recovery algorithms. While conventional self-coherent schemes typically require two fiber strands to transmit a single signal, the proposed shared-LO configuration allows a single LO to serve multiple signal channels, thereby improving fiber utilization efficiency. We experimentally demonstrate the transmission of 120- and 240-Gb/s PTBC 16-QAM signals over 80 km of single-mode fiber. A power budget analysis, based on our experimental results, shows that a single LO can support up to 15 and 7 signal channels for the 120- and 240-Gb/s systems, respectively, assuming a 16-dBm laser output power.

Source: Optics Communications

DOI: 10.1016/j.optcom.2025.132841

Authors: Jongwan Kim, Sang-Rok Moon, Sun Hyok Chang, Hun-Sik Kang, Sunghyun Bae

Institutions: Electronics and Telecommunications Research Institute, Sejong University

Language: English

Topic: Optical Network Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $2,600