激光场噪声对原子共振荧光压缩性质的影响

Eff ects of the laser field's noise on squeezing in resonance fluorescence

研究了由相干场和随机场驱动的二能级原子荧光场的压缩谱。在强场驱动和大失谐条件下,荧光场正规噪音谱的in-plase振幅出现双模压缩,并且通过调节原子的拉比频率可以来控制压缩频率,同时压缩还随着随机强度的增大而减小,压缩谱还与相干场和随机场之间的相对相位有关。

The quadrature squeezing spectra produced in the resonance fluorescence of a two-level atom driven by a strong coherent field and a weak amplitude-fluctuating field are investigated. For far-off-resonance and strong excitation, the resonance fluorescence exhibits two-mode squeezing around the Rabi sideband frequencies. Thus we have a source of two- mode squeezing that is verv easily frequency tuned simply by adjusting the generalized Rabi frequency. The presence of the strength of the stochastic process reduces the degree of squeezing obtainable. The quadrature squeezing spectra are also effected by the relative phase of the two fields.