Effects of opto-mechanical cavity and squeezed vacuum reservoir on V-type three level-laser

Abstract

The Properties of light generated by V-type three-level laser in a doubly resonant opto-mechanical cavity coupled to squeezed vacuum reservoir have been studied. The atoms injected into the laser cavity are initially prepared in a coherent superposition of the two upper levels. Employing the expectation values of the cavity mode variables at steady state, the variances of quadratures and EPR-like variables of the cavity light modes have been determined. The results show that the two-mode cavity light exhibits squeezing in the minus quadrature and entanglement for small values of linear gain coefficient of the atom. The opto-mechanical coupling strength and cavity size diminish the squeezing and entanglement properties, even though these quantities have no effect on the mean photon number of the cavity modes. Moreover, 87.8% of quadrature squeezing below the vacuum state is obtained.