How does an imperfect system affect the measurement of squeezing?
Tiancai Zhang, Zhang Jun-xiang, Changde Xie, Kunchi Peng · Acta Physica Sinica (Overseas Edition) · 1998
The effect of an imperfect system on the measurement of squeezing is studied. It is shown that the imperfectly efficient detectors and the unbalance of the beam-splitter will reduce the measured squeezing. The effects on quadrature phase squeezing and photon number squeezing are different from the usual balanced homodyne detection.