发表机构
Sungkyunkwan University（成均馆大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究设计并实现了一种工作距离26.15毫米、数值孔径0.5的离子-光子接口，采用六透镜物镜实现1.29%的光纤耦合效率，并保持非经典光子统计，为离子阱量子网络提供了实用方案。
AI 中文摘要
囚禁离子量子网络依赖于高效的离子-光子接口，而基于物镜的自由空间收集系统必须在高光子收集效率与足够的、便于与离子阱硬件实际集成的工作距离之间取得平衡。在此，我们设计并表征了一种离子-光子接口，其工作距离长达26.15毫米，数值孔径高达0.5。该接口的核心是一个由六个商用球面透镜组成、间距经过优化的光子收集物镜。该接口实现了从离子到探测器的整体光纤耦合光子探测效率为(1.29±0.09)%，并在无需主动重新对准的情况下维持光纤耦合数小时，支持离子到光纤接口的稳定运行。光子关联测量显示，光纤耦合荧光中存在明显的反聚束现象，证实了非经典光子统计特性的保持。这些结果展示了用于囚禁离子量子网络实验的长工作距离光子收集接口的实际实现。
英文摘要
Trapped-ion quantum networks rely on efficient ion-photon interfaces, while objective-based free-space collection systems must balance high photon collection with sufficient working distance for practical integration with ion-trap hardware. Here, we design and characterize an ion-photon interface with a long working distance of 26.15 mm and a high numerical aperture of 0.5. The core of the interface is a photon-collection objective consisting of six commercial spherical lenses with optimized spacing. The interface achieved an overall fiber-coupled photon-detection efficiency of (1.29$\pm$0.09)% from the ion to the detector and maintains fiber coupling over several hours without active realignment, supporting stable operation of the ion-to-fiber interface. Photon-correlation measurements show clear antibunching in the fiber-coupled fluorescence, confirming the preservation of non-classical photon statistics. These results demonstrate a practical implementation of a long-working-distance photon collection interface for trapped-ion quantum network experiments.
Comments14 pages, 6 figures, 2 tables
