Optics Letters

Observation of quantum-correlated twin beams in cascaded nonlinear interactions

Salvatore Castrignano, Iolanda Ricciardi, P. Maddaloni, Paolo De Natale, Stefan W. Wabnitz, M. De Rosa

Published Feb 21, 2024• 2 citations

Abstract

We report on the generation of twin beams through a cascaded process of optical parametric oscillation in a doubly resonant second-harmonic generation system. These bright beams exhibit strong quantum correlations, enabling the observation of up to 5 dB of noise reduction in their intensity difference below the standard quantum limit.

DOI: 10.1364/ol.514976

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