论文标题
基于热碱原子中的非脱位四波混合过程的光学参数振荡器的量子噪声相关性
Quantum noise correlations of an optical parametric oscillator based on a non-degenerate four wave mixing process in hot alkali atoms
论文作者
论文摘要
我们介绍了在高于阈值操作中双重共振光学参数振荡器（OPO）产生的双模式挤压的第一个测量，这是基于非退化的四波混合与rubidium $^{85} $ rb的参数放大的。我们证明，泵功率为285 mW，每张梁的泵功率为285 mW，最大强度差为-2.7 dB（-3,5 dB校正），输出功率为12 mW，接近RB原子的D1线。使用开放式空腔与高增益介质相结合的可能性可以提供强大的噪声压缩水平，并且可以访问Crystal基于Crystal的OPOS无法探索的新操作制度。挤压光的光谱带宽通过空腔动力学扩大，挤压水平对于强泵功率是可靠的。稳定的操作最多高于阈值四倍。此外，它接近碱原子原子共振的运行允许自然整合到量子网络中，包括量子记忆等结构。
We present the first measurement of two-mode squeezing between the twin beams produced by a doubly resonant optical parameter oscillator (OPO) in above threshold operation, based on parametric amplification by non degenerate four wave mixing with rubidium $^{85}$Rb. We demonstrate a maximum intensity difference squeezing of -2.7 dB (-3,5 dB corrected for losses) with a pump power of 285 mW and an output power of 12 mW for each beam, operating close to the D1 line of Rb atoms. The possibility to use open cavities combined with the high gain media can provide a strong level of noise compression, and the access to new operation regimes that could not be explored by crystal based OPOs. The spectral bandwidth of the squeezed light is broadened by the cavity dynamics, and the squeezing level is robust for strong pump powers. Stable operation was obtained up to four times above the threshold. Moreover, its operation close to the atomic resonances of alkali atoms allows a natural integration into quantum networks including structures such as quantum memories.
