Limits to phase information in the parametric oscillator.

Paul Kinsler

    Department of Physics, 
    Imperial College,
    Prince Consort Road,
    London SW7 2BW, 
    United Kingdom.

    http://arXiv.org/abs/quant-ph?0110118

Light in which the quantum fluctuations have been squeezed is
often proposed as a means of obtaining an improved phase
reference compared to that available from coherent light.  Such a
phase reference contains information about the phase of the
squeezed light, so it is important to calculate the limits to the
amount of "phase information" available.  I define a phase
resolution and show how this scales as we increase the number of
photons available when using squeezed light generated by a
parametric oscillator.  Simple schemes for creating squeezed
coherent light using a beam-splitter and an interferometer are
analyzed, and it is shown that the results agree with earlier
claims [Kinsler] that when using squeezed coherent light as a
phase reference, the gain is not one of improved accuracy, but of
lower power



    This research was primarily done at the Department of  
    Physics, University of Queensland, Australia 4072, as part 
    of my PhD in 1993-1994, and was largely contained within my 
    thesis.



Email: Dr.Paul.Kinsler@physics.org