调制的方法主要是通过改变正弦波的幅度、相位和频率来传送信息。

Modulation methods primarily through changes in the rate of sine wave, phase and frequency to transmit information.

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研究了频率随时间变化的压缩态光场与二能级原子的相互作用，主要讨论了光场频率随时间作正弦调制和脉冲调制两种典型情况下原子布居数反转随时间的演化特性。

The time evolution of atomic occupancy for the system of squeezed vacuum field interacting with two coupling atoms via intensity-dependent coupling in two-photon transition are investigated.

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