论文标题
在极大的望远镜上的纤维成像仪的功能
Capabilities of a fibered imager on an extremely large telescope
论文作者
论文摘要
首先，用于单个望远镜仪器的光纤成像仪是一种超高的角度分辨率的光谱图像器，能够在望远镜衍射极限之外提供校准的图像和测量值，这是传统AO成像无法触及的机制。首先通过将完整望远镜与单模纤维阵列耦合来实现灵敏度和准确性。干涉条纹在频谱上分散并成像在EMCCD上。目前，在Subaru望远镜的Subaru Corotographic Extreme Adaptive Optics仪器上安装了18纤维的首次设置。它被利用用于二元星系研究。在2020年末，它将通过延迟线和Active LinB03光子束组合芯片进行升级，从而使相位调制到MHz时的纳米精度。 Subaru望远镜的Sky结果表明，由于Exao系统稳定了可见的光波前，首先可以获得长时间的暴露并在明显的淡淡来源上运行，而不是以前的可能性。因此，在较大的望远镜上的一种类似方法将为超高角度分辨率的银河系（恒星物理学，亲密的伴侣）和外乳外观测提供独特的科学机会。我们还讨论了无效和高对比度成像的潜在设计变化。
FIRST, the Fibered Imager foR a Single Telescope instrument, is an ultra-high angular resolution spectro-imager, able to deliver calibrated images and measurements beyond the telescope diffraction limit, a regime that is out of reach for conventional AO imaging. FIRST achieves sensitivity and accuracy by coupling the full telescope to an array of single mode fibers. Interferometric fringes are spectrally dispersed and imaged on an EMCCD. An 18-Fiber FIRST setup is currently installed on the Subaru Coronographic Extreme Adaptive Optics instrument at Subaru telescope. It is being exploited for binary star system study. In the late 2020 it will be upgraded with delay lines and an active LiNb03 photonic beam-combining chip allowing phase modulation to nanometer accuracy at MHz. On-sky results at Subaru Telescope have demonstrated that, thanks to the ExAO system stabilizing the visible light wavefront, FIRST can acquire long exposure and operate on significantly fainter sources than previously possible. A similar approach on a larger telescope would therefore offer unique scientific opportunities for galactic (stellar physics, close companions) and extragalactic observations at ultra-high angular resolution. We also discuss potential design variations for nulling and high contrast imaging.
