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Published on: January 28, 2019
Sub-shot-noise phase quadrature measurement of intense light beams
O Glöckl1, U L Andersen, S Lorenz
1Institut für Optik, Information und Photonik, Max-Planck Forschungsgruppe, Universität Erlangen-Nürnberg, Staudtstrasse 7/B2, 91058 Erlangen, Germany. gloeckl@kerr.physik.uni-erlangen.de
Abstract:
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.
