用于spectroscopy的高色散高效率布拉格光栅
Higher dispersion and efficiency Bragg gratings for optical spectroscopy
摘要：
大规模多路复用光谱恒星调查，如MSE提出了巨大的挑战，在摄谱仪的设计。高复用、大望远镜孔径、高分辨率（R~ 40，000）和自然视宁度的组合意味着需要具有大光束尺寸、大光栅角和快速相机速度的多个光谱仪，具有高成本和风险。减小光束尺寸的一个有吸引力的选择是在比迄今为止考虑的高得多的角度下使用布拉格型光栅。除了减小光谱仪尺寸和成本之外，由于s和p偏振布拉格效率峰值的紧密匹配，这还允许非常高的效率的可能性。光栅本身可以是VPH光栅，但表面浮雕（SR）光栅提供了一个越来越有吸引力的替代方案，具有更高的最大线密度和更好的带宽。在任何一种情况下，光栅都需要浸没在大棱镜中，以使光以所需的角度进出光栅。我们提出了光栅设计和标称摄谱仪设计，显示效率增益和尺寸减小，这样的光栅可能允许MSE高分辨率摄谱仪。
英文摘要：
Massively multiplexed spectroscopic stellar surveys such as MSE present enormous challenges in the spectrograph design. The combination of high multiplex, large telescope aperture, high resolution (R~40,000) and natural seeing implies that multiple spectrographs with large beam sizes, large grating angles, and fast camera speeds are required, with high cost and risk. An attractive option to reduce the beam size is to use Bragg-type gratings at much higher angles than hitherto considered. As well as reducing the spectrograph size and cost, this also allows the possibility of very high efficiency due to a close match of s and p-polarization Bragg efficiency peaks. The grating itself could be a VPH grating, but Surface Relief (SR) gratings offer an increasingly attractive alternative, with higher maximum line density and better bandwidth. In either case, the grating needs to be immersed within large prisms to get the light to and from the grating at the required angles. We present grating designs and nominal spectrograph designs showing the efficiency gains and size reductions such gratings might allow for the MSE high resolution spectrograph.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
