2021/07/22 by Ye, Zhichao, Zhao, Ping, Twayana, Krishna +3 · 1 citation
#FOS: Physical sciences #Optics (physics.optics)
paper · doi:10.48550/arxiv.2107.10632
Optical amplifiers are essential in numerous photonic applications. Parametric amplifiers, relying on a nonlinear material to create amplification, are uniquely promising as they can amplify without generating excess noise. Here, we demonstrate amplification based on the 3rd order nonlinearity in a single chip, while in addition reporting a noise figure significantly below the conventional quantum limit when operated in phase-sensitive mode. Our results show the potential of nanophotonics for realizing continuous-wave parametric amplification that can enable applications in optical communications, signal processing and quantum optics across a wide range of frequencies.