标题： 一种用于零位干涉测量的中红外宽带消色差天文光束合成器 显示英文标题

标题： A mid-infrared broadband achromatic astronomical beam combiner for nulling interferometry

摘要： 集成光学光束合成器在天文成像方面比传统的体光学实现方式具有许多优势。迄今为止，集成光学光束合成器仅在低于4微米的工作波长下得到演示。然而，在中红外波段的操作是非常可取的。本文提出了一种基于三条耦合波导的理论设计方法，以实现完全消色差、宽带、偏振无关且无损耗的光束合成。这种设计可能使得实现深空探测所需的非常宽的宽带零点成为可能。 显示英文摘要

摘要： Integrated optic beam combiners offer many advantages over conventional bulk optic implementations for astronomical imaging. To date, integrated optic beam combiners have only been demonstrated at operating wavelengths below 4 microns. Operation in mid-infrared wavelength region, however, is highly desirable. In this paper, a theoretical design technique based on three coupled waveguides is developed to achieve fully achromatic, broadband, polarization-insensitive, lossless beam combining. This design may make it possible to achieve the very deep broadband nulls needed for exoplanet searching.