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Time-domain analysis of quantum states of light: noise characterization and homodyne tomography

Alessandro Zavatta, Marco Bellini, Pier Luigi Ramazza, Francesco Marin, and Fortunato Tito Arecchi

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Abstract

We measured the time-domain quantum statistics of a pulsed, high-repetition-rate optical field by balanced homodyne detection. The measuring apparatus discriminates the time scales on which intrinsic quantum fluctuations prevail from those scales for which technical noise is overwhelming. A tomographic reconstruction of weak coherent states with various average photon numbers demonstrates the potential ability of the system to measure high-repetition-rate, time-resolved signals. Possible extensions to other physical situations are discussed.

© 2002 Optical Society of America

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