Bichromatic homodyne detection of broadband quadrature squeezing

We experimentally study a homodyne detection technique for the characterization of a quadrature squeezed field where the correlated bands, here created by four-wave mixing in a hot atomic vapor, are separated by a large frequency gap of more than 6 GHz. The technique uses a two-frequency local oscil...

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Bibliographic Details
Published in:arXiv.org 2016-09
Main Authors: Embrey, Christopher S, Hordell, Joshua, Petrov, Plamen G, Boyer, Vincent
Format: Article
Language:English
Subjects:
Broadband
Compressing
Four-wave mixing
Variations
Online Access:Get full text
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Summary:We experimentally study a homodyne detection technique for the characterization of a quadrature squeezed field where the correlated bands, here created by four-wave mixing in a hot atomic vapor, are separated by a large frequency gap of more than 6 GHz. The technique uses a two-frequency local oscillator to detect the fluctuations of the correlated bands at a frequency accessible to the detection electronics. Working at low detection frequency, the method allows for the determination of both the amplitude and the phase of the squeezing spectrum. In particular, we show that the quadrature squeezing created by our four-wave mixing process displays a noise ellipse rotation of \(\pi/2\) across the squeezing spectrum
ISSN:2331-8422
DOI:10.48550/arxiv.1609.03196