Stream 1: Telecommunications
Hollow-Core Fiber Transmission: Metro Trials and 11,000-km Loop Results
Abdallah Ali, Microsoft
We investigate the unique capabilities of hollow-core fiber (HCF) through a series of comprehensive real-time transmission experiments. For metro applications, we demonstrate record single-span transmission over 301.7 km and achieve a full C-band system data rate of 25.6 Tb/s over a 200.5 km link. We further evaluate practical deployment scenarios by validating bidirectional 400ZR transmission over HCF spans. For long-haul applications, we examine the extended-reach potential of HCF by demonstrating transmission distances of up to 11,000 km using a recirculating-loop configuration, highlighting its suitability for future ultra-low-latency global networks.
100W C-band amplifiers for Tbit/s satellite links
James Edmunds, G&H
We present work on the development of extremely high-power optical fibre amplifier systems (EPOS) in the 1.5μm window for Tbit/s satellite links that will enable next generation optical satellite communications. This R&D programme focuses on developing a 100W optical amplifier for space and a 1000W amplifier system for ground use. Within this presentation, a range of experimental and simulation results are presented for a 100W class-amplifier, including: FWM crosstalk, gain flatness under WDM operation, nonlinear polarization rotation under intensity modulation, power limits of Er-Yb fibres induced by parasitic lasing at 1μm, beam quality and thermal performance.
Intelligent Signal Processing and Detection in Optical Communication and Integrated Optical Communication and Sensing Systems
Dr Tianhua Xu, University of Warwick
Intelligent signal processing and optimized signal detection techniques have become integral to modern optical communication and sensing systems. In this talk, I will present our recent research on nonlinearity compensation and constellation shaping for high-speed optical fiber communication systems, as well as enhanced signal detection in ultraviolet communication systems. Additionally, I will discuss the role of intelligent signal processing in integrated sensing and communication (ISAC) systems and share emerging insights into semantic communication over optical channels.