PRAXIS: beating the infrared night sky with multicore fibre Bragg gratings

PRAXIS：用多芯光纤布拉格光栅击败红外夜空： PRAXIS项目旨在开创地基红外观测的新时代。红外夜空比光学夜空亮一百倍，这严重限制了这些波长的灵敏度。但是，99%的红外天空来自地球大气中的羟基产生的数百条极其明亮、狭窄的发射线。英澳望远镜的PRAXIS旨在使用澳大利亚开发的新型多芯光纤布拉格光栅来消除这些线。新的光纤将使夜空非常黑暗，并允许澳大利亚天文学家获得独特的观测结果。天空抑制纤维还将使我们能够为澳大利亚的超大望远镜开发新的仪器概念。

PRAXIS: beating the infrared night sky with multicore fibre Bragg gratings: The PRAXIS project aims to deliver a new era in ground-based infrared observations. The infrared night sky is a hundred times brighter than the optical night sky, which has severely limited the sensitivity at these wavelengths. But 99 per cent of the infrared sky arises from hundreds of extremely bright, narrow emission lines due to hydroxyl in the Earth's atmosphere. PRAXIS, at the Anglo-Australian Telescope, is designed to cancel these lines using new multicore fibre Bragg gratings developed in Australia. The new fibres would render the night sky very dark and allow Australian astronomers to obtain unique observations. The sky-suppressing fibres would also allow us to develop new instrument concepts for Australia's extremely large telescope.