使用光学path difference抖动稳定零干涉仪
Stabilising a nulling interferometer using optical path difference dithering
摘要：
上下文调零干涉测量法被建议作为达尔文和TPF-I系外行星研究任务的基本原则。目标。存在对调零比的平均值及其稳定性的约束。仪器不稳定噪声是最不利于调零性能稳定的因素。方法.我们应用了一个经典的抖动技术的修改版本的光程差的科学光束。结果仅使用这种方法，我们就反复稳定了几个小时的暗条纹。这种方法本身就足以消除我们设置中的噪声的1/ f分量，通常持续10分钟。这些结果表明，性能稳定性可以保持整个长时间的数据采集典型的系外行星光谱。结论.我们建议进一步研究可能的稳定策略应该是Darwin/TPF-I研究和开发的一个组成部分
英文摘要：
Context. Nulling interferometry has been suggested as the underlying principle for the Darwin and TPF-I exoplanet research missions. Aims. There are constraints both on the mean value of the nulling ratio, and on its stability. Instrument instability noise is most detrimental to the stability of the nulling performance. Methods. We applied a modified version of the classical dithering technique to the optical path difference in the scientific beam. Results. Using only this method, we repeatedly stabilised the dark fringe for several hours. This method alone sufficed to remove the 1/ f component of the noise in our setup for periods of 10 minutes, typically. These results indicate that performance stability may be maintained throughout the long-duration data acquisitions typical of exoplanet spectroscopy. Conclusions. We suggest that further study of possible stabilisation strategies should be an integral part of Darwin/TPF-I research and development
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