The control of large-scale quantum information processors based on arrays of trapped ions requires a means to route and focus multiple laser beams to each of many trapping sites in parallel. Here, we combine arrays of fibres, 3D laser-written waveguides and diffractive microlenses to demonstrate the principle of a micro-optic interconnect suited to this task. The module is intended for use with an ion microtrap of 3D electrode geometry. It guides ten independent laser beams with unique trajectories to illuminate a pair of spatially separated target points. Three blue and two infrared beams converge to overlap precisely at each desired position. Typical relative crosstalk intensities in the blue are 3.6 10⁻³ and the average insertion loss across all channels is 8 dB. The module occupies ∼10⁴ times less volume than a conventional bulk-optic equivalent and is suited to different ion species.

基于俘获离子阵列的大规模量子信息处理器的控制需要一种方法来将多个激光束并行地路由和聚焦到许多俘获位点中的每一个。在这里，我们结合了纤维阵列、3D 激光写入波导和衍射微透镜来演示适合此任务的微光学互连的原理。该模块旨在与 3D 电极几何形状的离子微阱一起使用。它引导十束具有独特轨迹的独立激光束来照亮一对空间分离的目标点。三个蓝色光束和两个红外光束会聚并在每个所需位置精确重叠。蓝色中典型的相对串扰强度为 3.6 10 ^-3并且所有通道的平均插入损耗为 8 dB。模块占用 ∼10 ⁴ 体积比传统的体光学等效物小数倍，适用于不同的离子种类。