论文标题
rubidium转变作为天文多普勒光谱仪的波长参考
Rubidium transitions as wavelength reference for astronomical Doppler spectrographs
论文作者
论文摘要
精确的波长校准是高分辨率光谱观测的关键问题。理想的校准源应该能够提供恒定强度均匀分布的光谱线的非常稳定且致密的网格。我们小组已经开发了一种满足所有提到条件的新方法。该方法是积极测量Fabry-Perot Etalon的单光谱线的精确位置，其精度很高，并具有可波长可调激光的激光，并将其与极为稳定的波长标准进行比较。标准的理想选择是Rubidium的D2吸收系，该系列数十年来已被用作光学频率标准。通过这种技术，光谱仪的稳定波长校准的问题成为一个问题，即我们如何可靠地测量和锚定一条Etalon线向RB过渡。在这项工作中，我们介绍了用于RB饱和吸收光谱的自制模块，并讨论了其稳定性。
Precise wavelength calibration is a critical issue for high-resolution spectroscopic observations. The ideal calibration source should be able to provide a very stable and dense grid of evenly distributed spectral lines of constant intensity. A new method which satisfies all mentioned conditions has been developed by our group. The approach is to actively measure the exact position of a single spectral line of a Fabry-Perot etalon with very high precision with a wavelength-tuneable laser and compare it to an extremely stable wavelength standard. The ideal choice of standard is the D2 absorption line of Rubidium, which has been used as an optical frequency standard for decades. With this technique, the problem of stable wavelength calibration of spectrographs becomes a problem of how reliably we can measure and anchor one etalon line to the Rb transition. In this work we present our self-built module for Rb saturated absorption spectroscopy and discuss its stability.
