论文标题
1350nm从12MW外部泵电源在775nm处挤压真空状态
13dB Squeezed Vacuum States at 1550nm from 12mW external pump power at 775nm
论文作者
论文摘要
电信波长的强烈挤压光是通过光纤网络单面独立的量子键分布的必要资源。降低其一代所需的光泵功率将推进这种量子技术，从而有效地实验室。在这里，我们研究了在1550nm处于最先进的双持续持续的站立波PPKTP腔设置中，在1550nm处挤压了连续波的吸尘状态的第二次谐波泵功率需求。我们通过空腔长度对花序相进行粗略调节，并通过温度进行微调，以同时实现双共振和（准）相位匹配，并在1550nm的1550nm挤压系数从775nm的12MW外部泵功率开始。我们预计，优化空腔耦合器的反射率将使外部泵的功率降低到3MW，而不会降低挤压因子。
Strongly squeezed light at telecommunication wavelengths is the necessary resource for one-sided device-independent quantum key distribution via fibre networks. Reducing the optical pump power that is required for its generation will advance this quantum technology towards efficient out-of-laboratory operation. Here, we investigate the second-harmonic pump power requirement for parametric generation of continuous-wave squeezed vacuum states at 1550nm in a state-of-the-art doubly-resonant standing-wave PPKTP cavity setup. We use coarse adjustment of the Gouy phase via the cavity length together with temperature fine-tuning for simultaneously achieving double resonance and (quasi) phase matching, and observe a squeeze factor of 13dB at 1550nm from just 12mW external pump power at 775nm. We anticipate that optimizing the cavity coupler reflectivity will reduce the external pump power to 3mW, without reducing the squeeze factor.
