Abstract
It is shown that oscillators using nearly degenerate parametric conversion or four-wave mixing in the phase conjugation geometry generate pairs of highly correlated photons. The intensity difference of the two corresponding light beams is then expected to be below the shot noise limit. This property can be used to produce intensity stabilized light beams below the quantum limit.
The phases of the twin beams also exhibit interesting correlation properties which will be discussed. Moreover, the combination of the twin beams gives a squeezed state, which has been observed by other authors when the device is below the oscillation threshold. We will describe preliminary results of experiments performedabove oscillation threshold.
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Giacobino, E., Fabre, C., Heidmann, A. et al. Generation of non classical states of light by phase conjugation and parametric conversion. Hyperfine Interact 37, 109–124 (1987). https://doi.org/10.1007/BF02395706
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DOI: https://doi.org/10.1007/BF02395706