Overcoming the quantum limit of optical amplification in monolithic waveguides.
basic_science · Level V
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- Record sourced from PubMed, PMID 34524857.
- Also identified by DOI 10.1126/sciadv.abi8150 and PMC identifier 8443169.
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Abstract
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 third-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.