Abstract
From a quantum optics point of view the problem of three modes time-dependent coupled oscillators is considered. The connection related to the directional coupler is given,and the solution in the Heisenberg picture is obtained. The Glauber second-order correlation function has been used to discuss the bunching and antibunching. The phenomena of squeezing as well as the quasiprobability distribution functions (Wigner function and Q-function) are examined.