Journal
OPTICS LETTERS
Volume 29, Issue 16, Pages 1936-1938Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.29.001936
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We present a setup for performing sub-shot-noise measurements of the phase quadrature of intense pulsed light without the use of a separate local oscillator. A Mach-Zehnder interferometer with an unbalanced arm length is used to detect the fluctuations of the phase quadrature at a single sideband frequency. With this setup, the nonseparability of a pair of quadrature-entangled beams is demonstrated experimentally. (C) 2004 Optical Society of America.
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