论文标题
3D打印的小平面连接光学元件，用于光束塑造的光学分阶段阵列
3D-printed facet-attached optical elements for beam shaping in optical phased arrays
论文作者
论文摘要
我们演示了一个配备了3D打印的小平面元件的光学阶段阵列（OPA），用于塑造和偏转发射光束。光束塑形器将自由形式的折射表面与总内部反射（TIR）镜相结合，并使用高分辨率的多光子光刻图将其原位印刷到边缘发射波导方面，从而确保相对于片上波导结构，从而确保了精确的对齐。在概念验证实验中，我们达到了$ \ pm 30°$的无光齿轮转向范围和大约$ 2°$的全宽度（FWHM）束发射的全宽度（FWHM）。该概念为当前使用的光栅结构提供了有吸引力的替代方法，并且适用于广泛的集成平台。
We demonstrate an optical phased-array (OPA) equipped with a 3D-printed facet-attached element for shaping and deflection of the emitted beam. The beam shaper combines freeform refractive surfaces with total-internal-reflection (TIR) mirrors and is in-situ printed to edge-emitting waveguide facets using high-resolution multi-photon lithography, thereby ensuring precise alignment with respect to on-chip waveguide structures. In a proof-of-concept experiment, we achieve a grating-lobe free steering range of $\pm 30°$ and a full-width-halfmaximum (FWHM) beam divergence of approximately $2°$. The concept opens an attractive alternative to currently used grating structures and is applicable to a wide range of integration platforms.
