Johann Riemensberger

Mar 12, 2025 | nature.com | Nikolai Kuznetsov |Johann Riemensberger |Paul Seidler |Alisa Davydova

AbstractOptical amplification, crucial for modern communication, primarily relies on erbium-doped fibre amplifiers (EDFAs)1,2. Yet, EDFAs only cover a portion of the low-loss spectrum of optical fibres. This has motivated the development of amplifiers operating beyond the erbium gain window. Pioneering work on optical parametric amplifiers (OPAs)3,4 using intrinsic third-order optical nonlinearity has led to demonstrations of increased channel capacity.