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arXiv 1404.0004astro-ph.IM
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用于光谱仪校准的法布里-珀罗标准具稳定到3cm/s

Stabilizing a Fabry-Perot etalon to 3 cm/s for spectrograph calibration

Christian Schwab, Julian Stuermer, Yulia V. Gurevich, Thorsten Fuehrer, Steve K. Lamoreaux, Thomas Walther, Andreas Quirrenbach

摘要:

提出了一种宽带标准具的稳频方法,该标准具可作为中阶梯光谱仪的高精度波长校准器。利用激光探测铷原子D2线的无多普勒饱和吸收,将标准具的一个透射峰直接稳定在铷原子的频率上。铷跃迁是一个已建立的频率标准,并已被用于锁定激光器的分数稳定性的$<10^{-12}$,精度水平远远超过径向速度(RV)搜索系外行星的要求。我们描述了一个简单的设置,专门设计用于在天文台,并表明,我们可以稳定的标准具峰值的相对精度为$<10^{-10}$,这相当于3厘米/秒RV精度。

英文摘要:

We present a method of frequency stabilizing a broadband etalon that can serve as a high-precision wavelength calibrator for an Echelle spectrograph. Using a laser to probe the Doppler-free saturated absorption of the rubidium D2 line, we stabilize one etalon transmission peak directly to the rubidium frequency. The rubidium transition is an established frequency standard and has been used to lock lasers to fractional stabilities of $<10^{-12}$, a level of accuracy far exceeding the demands of radial velocity (RV) searches for exoplanets. We describe a simple setup designed specifically for use at an observatory and demonstrate that we can stabilize the etalon peak to a relative precision of $<10^{-10}$; this is equivalent to 3 cm/s RV precision.

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。

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