论文标题
Subaru望远镜的第一个可见的纤维干涉仪升级的第一光
First light of the FIRST visible fibered interferometer upgrade at the Subaru telescope
论文作者
论文摘要
FirstV2（单个望远镜版本2版的光纤成像仪）是对AO后光谱互动计（第一个）的升级，该升级能够以低于单个望远镜的衍射极限的空间尺度，在空间尺度上实现高对比度成像和光谱。首先是在Subaru望远镜上以Subaru Extreme AO（SCEXAO）平台的模块安装并经常使用。它通过稀疏的孔掩模，单模纤维的空间滤波以及可见的（600-900nm）的跨分散来实现灵敏度和准确性。正在进行的升级旨在使用光子芯片束组合器，从而可以独立地测量每个基线的复杂可见性。使用集成的光学技术将提高稳定性和灵敏度，从而提高动态范围。在可见的波长范围内工作的集成光学芯片（就吞吐量和极化而言）。在我们的实验室中，几个光子芯片正在表征，我们已经在Subaru望远镜的FirstV2仪器中安装了第一个原型芯片。因此，我将首次在可见的情况下报告使用这种设备获得的天内结果。这是迈向FirstV2的完整升级的第一步，它最终将通过结合可见的高角度分辨率和光谱分辨率来提供独特的功能来检测和表征诸如系外行星之类的近距离伴侣。
FIRSTv2 (Fibered Imager foR a Single Telescope version 2) is the upgrade of a post-AO spectro-interferometer (FIRST) that enables high contrast imaging and spectroscopy at spatial scales below the diffraction limit of a single telescope. FIRST is currently installed, and routinely used, on the Subaru telescope as a module of the Subaru Extreme AO (SCExAO) platform. It achieves sensitivity and accuracy by a unique combination of sparse aperture masking, spatial filtering by single-mode fibers and cross-dispersion in the visible (600-900nm). The ongoing upgrade aims at using a photonic chip beam combiner, allowing the measurement of the complex visibility for every baseline independently. Using the integrated optics technology will increase the stability and sensitivity, and thus improve the dynamic range. Integrated optics chips working in the visible wavelength range are challenging (in terms of throughput and polarization). Several photonic chips are under characterization in our laboratory and we have installed a first prototype chip in the FIRSTv2 instrument at the Subaru Telescope. I will thus report on the on-sky results obtained with this kind of device, for the first time in the visible. This is the first step towards the full upgrade of FIRSTv2, that will ultimately provide unique capabilities to detect and characterize close companions such as exoplanets, by combining high angular resolution and spectral resolution in the visible.
