A Degenerate Three-level Laser Coupled To A Squeezed Vacuum Reservoir

Employing the master equation for a three-level laser driven by coherent light andrncoupled to a squeezed vacuum reservoir, we obtain stochastic differential equationsrnassociated with the normal ordering. Using the solutions of the stochastic differentialrnequations, we calculate the quadrature variance, the squeezing spectrum, the meanrnphoton number, and the variance of the photon number. It turns out that the degreernof squeezing increases with the linear gain coefficient or the squeeze parameter. It isrnalso found that the driving coherent light decreases the mean photon number

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