连续变量压缩态光场在特定分量能够突破量子噪声极限,在量子信息科学的发展中已经成为不可或缺的量子资源。光电二极管具有一定结电容,结合外围电感可形成电感电容(LC)共振电路,进而可以实现对单一频率范围内信号的共振增强探测,通过选取低噪声运算放大器,高性能镀金电路板材以及优化各种元件在电路板上的布局等措施来提升共振型探测器性能,最终研制了一款品质因子高达2286的高性能共振型探测器。此探测器可为连续变量压缩态以及纠缠态光场的实验制备提供有效资源,进而推动连续变量量子信息科学的发展。

Squeezed state light is a very important resource in continuous variable quantum information. Its specific component can break through the quantum noise limit, which makes it an indispensable quantum resource in the field of quantum information. Pound-Drever-Hall (PDH) technique is widly used to lock the OPO cavity and relative phase in generating a stable squeezed state. High performance detectors are very important for PDH technique. We adopt a LC parallel resonant circuit, which is composed of the inherent capacitance of a photodiode and an extra inductor to realize the resonance enhancement detection of signal at spectial frequency. We use low noise operational amplifier to reduce electronic noise and optimize the layout of the various components on the circuit board to reduce the influence of stray capacitance. Finally, the transfer function of the developed resonance detector is measured by the network analyzer, and a high-performance resonance detector with quality factor up to 2286 is realized. The detector provides high-performance detection for the cavity length and phase locking in the generation of non-classical states, and further provides a reliable resonance for high-performance continuous variable quantum information science.