Abstract
We revisit the problem of quantum state reconstruction of light beams from the photocurrent quantum noise. As is well known, but often overlooked, two longitudinal field modes contribute to each spectral component of the photocurrent (sideband modes). We show that spectral homodyne detection is intrinsically incapable of providing all the information needed for the full reconstruction of the two-mode spectral quantum state. Such a limitation is overcome by the technique of resonator detection. A detailed theoretical description and comparison of both methods is presented, as well as an experiment to measure the six-mode quantum state of pump-signal-idler beams of an optical parametric oscillator above the oscillation threshold.
3 More- Received 20 December 2012
DOI:https://doi.org/10.1103/PhysRevA.88.052113
©2013 American Physical Society
Synopsis
Photon Reader Loses Less in Translation
Published 14 November 2013
A technique for decoding the state of a photon is able to capture the potentially useful information carried by quantum fluctuations.
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