Two-mode heterodyne phase detection
G. M. D'Ariano, M. F. Sacchi
Abstract
We present an experimental scheme that achieves ideal phase detection on a two-mode field. The two modes a and b are the signal and image band modes of an heterodyne detector, with the field approaching an eigenstate of the photocurrent Z=a+b†. The field is obtained by means of a high-gain phase-insensitive amplifier followed by a high-transmissivity beam-splitter with a strong local oscillator at the frequency of one of the two modes.
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