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Quantum nondemolition measurement with a nonclassical meter input and an electro-optic enhancement

Andersen, U; Buchler, Benjamin; Bachor, Hans; Lam, Ping Koy


Optical quantum nondemolition measurements are performed using a beamsplitter with a nonclassical meter input and a electro-optic feedforward loop. The nonclassical meter input is provided by a stable 4.5 dB amplitude squeezed source generated by an optical parametric amplifier. We show that the implementation of a feedforward loop gives a substantial improvement in the signal transfer efficiency. With a 92% reflective beamsplitter we measure a transfer coefficient of Ts+m = 1.81. The quantum...[Show more]

CollectionsANU Research Publications
Date published: 2002
Type: Journal article
Source: Journal of Optics B: Quantum and Semiclassical Optics
DOI: 10.1088/1464-4266/4/3/380


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