AI 中文总结
针对系外行星探测中恒星光芒干扰问题，本文提出基于光子芯片的核零干涉与主动相位控制技术，并通过四光束核零干涉仪实验验证了其高对比度成像能力。
AI 中文摘要
表征系外行星和寻找生物特征是天文学中最热门的话题之一。这一探索面临着暗淡行星与宿主恒星压倒性光芒之间的亮度对比、它们之间很小的角距离以及由光学像差导致的观测条件退化等挑战。零差干涉测量法是一种很有前景的技术，通过同时满足高对比度和高角分辨率的要求来实现这一目标。光子集成回路（PICs）提供了零差干涉所需的紧凑性、设计灵活性和可扩展性。在PHOTONICS项目中，我们旨在基于多模干涉仪（MMI）耦合器和无移动部件的片上主动相位控制，创建新颖的相干组合架构。我们展示了首个由单个MMI耦合器制成的四光束核零干涉仪（kernel-nuller）的实验室测试，该干涉仪具有主动相位控制：ABCD条纹跟踪以及四光束核零干涉仪对比度探测极限的表征。
英文摘要
Characterizing exoplanets and finding biosignatures are among the hottest topics in astronomy. This quest is challenged by the brightness contrast between the faint planet and the overwhelming glare of the host star, their small angular separation, and observing conditions degraded by optical aberrations. Nulling interferometry is a promising technique to achieve this goal by fulfilling requirements for both high contrast and high angular resolution. Photonic Integrated Circuits (PICs) provide compactness, design versatility, and scalability needed for nulling. With the PHOTONICS project, we aim to create novel coherent combination architectures, based on a multimode interferometer (MMI) coupler and on-chip active phase control with no moving parts. We present the first lab tests of a four-beam kernel-nuller made out of a single MMI coupler with active phase control: ABCD fringe-tracking and the characterization of the contrast detection limits of a four-beam kernel-nuller.
Journal refProc. SPIE 14148, Optical and Infrared Interferometry and Imaging X, 1414836 (21 Aug 2026)
