发表机构
University of Notre Dame; Penn High School（圣母大学; 彭恩高中）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文为衍射极限径向速度光谱仪开发半自动单模光纤耦合控制程序，模拟显示可将星-光纤间距从3.9降至0.11模场直径，耦合指标从零提升至0.6-0.8，并适用于紧密双星。
AI 中文摘要
传统天文光谱仪受视宁度限制，通常使用多模光纤将星光注入下游光学系统。即将推出的多普勒径向速度（RV）仪器预计将越来越多地采用自适应光学和更小的单模光纤（SMF），从而实现更高的光谱分辨率和改进光谱仪点扩散函数的稳定性。然而，在近红外波长下，将星光耦合到特征直径仅为5-10微米的单模光纤中，在技术上要求很高，需要在整个观测期间既高效又稳定的对准程序。本文描述了一种正在为衍射极限径向速度光谱仪开发的半自动单模光纤耦合控制程序。代表性模拟表明，该控制器在采集后将星-光纤间距从约3.9个模场直径（MFD）减小到0.11个MFD，同时将归一化耦合指标从零提高到接近0.6-0.8的值。还研究了该程序在紧密分离的双星上的应用。
英文摘要
Conventional astronomical spectrographs are seeing-limited and commonly use multimode fibers to inject starlight into downstream optics. Forthcoming Doppler radial-velocity (RV) instruments are expected to make increasing use of adaptive optics and smaller single-mode fibers (SMF), enabling higher spectral resolution and improved stabilization of the spectrograph point-spread function. However, coupling starlight into SMFs with characteristic diameters of only 5-10 microns at near-infrared wavelengths is technically demanding, requiring alignment procedures that are both efficient and stable throughout the duration of an observation. In this paper, we describe a semi-automated SMF coupling control program being developed for diffraction-limited RV spectrographs. Representative simulations demonstrate that the controller reduces the star-fiber separation from approximately 3.9 mode field diameters (MFD) to 0.11 MFD while increasing a normalized coupling metric from zero to values near 0.6-0.8 after acquisition. Application to closely-separated binary stars is also studied.
CommentsSPIE Proceedings, Optics and Photonics, San Diego, CA 2026
