GENERATION OF HIGHER-ORDER SQUEEZING IN A MICROMASER

The fourth-order squeezing and amplitude-squared squeezing of cotangen t states produced in one-atom micromasers are investigated. It is foun d that optimal squeezing in the cotangent state can be achieved by pro perly choosing the relative amplitudes of the atomic coherent state. F rom our study of the dynamic process of the generation of steady-state fourth-order squeezing and amplitude-squared squeezing in one-atom mi cromasers, it is also shown that for sufficiently large atomic flux, t he cavity loss, and finite temperature in the cavity have very little influence on the generation of these higher-order squeezings in practi ce.