Yashuai Han, Xin Wen, Jinyu Liu, Jun He, Junmin Wang
We report the experimental demonstration of polarization squeezed beam at 795 nm by combining a quadrature squeezed beam with a coherent beam. The quadrature squeezed beam is generated by a degenerate optical parametric amplifier based on a PPKTP crystal.Stokes parameter squeezing of -3.8 dB and anti squeezing of +5.0 dB is observed. This polarization squeezed beam resonant to rubidium D 1 line has potential applications in quantum information networks and precise measurement beyond the shot noise limit.
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