压缩态光场是一类重要的非经典光场,是产生量子纠缠和进行量子通信的基础,在量子光学研究中具有十分重要的应用价值。本实验通过使用稳定的光学元件和合理的光路系统,简化系统复杂性,使压缩光装置整体结构紧凑、调节方便、稳定度高和可靠性好,通过上述方法,我们利用周期性极化磷酸钛氧钾(PPKTP)晶体获得了稳定的2 dB压缩和8 dB反向压缩的真空压缩光场。本装置的目的在于提供一种稳定的真空压缩光场产生装置。
Squeezed light is an important non-classical light field.It is the basis of quantum entanglement and quantum communication and has a very important application value in quantum optics field.In this paper,we utilize stable optical components and simplify the complexity of the generation system of squeezed light,so we could obtain a stable squeezed vacuum light with the squeezed component of 2 dB below shot noise level(SNL) and the anti-squeezed component of 8 dB above SNL by periodically poled potassium titanyl oxygenic phosphate(PPKTP) crystals.The purpose of this paper is to provide a stable generation device of squeezed vacuum light.