中文摘要：

超导的 nanowire 的光联合单个光子的察觉者(SNSPD ) 总是为一个有限察觉区域被限制了为单个模式的纤维。在这研究，为提高光子联合，在 2.2K 操作的一个双透镜的系统被用来根据 Gaussian 横梁理论和几何近似压缩横梁尺寸。约 0.3 的放大被获得，并且有近似 10m 的直径的一个集中的点从 multimode 纤维被测量。帮助了压缩横梁， 55% 的系统效率(1550nm ) 与 10m 的一个察觉区域为 SNSPD 被完成

英文摘要：

The optical coupling of superconducting nanowire single-photon detectors （SNSPDs） has always been restricted to a single-mode fiber for a limited detection area. In this study, for enhancing photon coupling, a dual-lens system operating at 2.2 K was used to compress the beam size on the basis of the Gaussian beam theory and geometric approximation. A magnification of approximately 0.3 was obtained, and a focused spot with diameter of approximately 10 ~m was measured from a multimode fiber. Assisted with the compressed beam, a system efficiency of 55 % （1550 nm） was achieved for a SNSPD with a detection area of 10 μm × 10 μm and 62.5 pm multimode fiber coupling. At the same time, a high speed of 106 MHz was measured with the proposed system. The realization of a highly compressed optical beam reduced the optical coupling requirement and helped maintain a high speed for the SNSPD.