Sub-shot-noise phase quadrature measurement of intense light beams

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 fr...

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Bibliographic Details
Published in:Optics letters 2004-08, Vol.29 (16), p.1936-1938
Main Authors: GLÖCKL, O, ANDERSEN, U. L, LORENZ, S, SILBERHORN, Ch, KOROLKOVA, N, LEUCHS, G
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optics
Physics
Quantum communication
Quantum fluctuations, quantum noise, and quantum jumps
Quantum information
Quantum optics
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Summary: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.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.29.001936