Extreme Doppler precision with octagonal fiber scramblers
Extreme Doppler precision with octagonal fiber scramblers
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八角形光纤扰频器提供极高的多普勒精度
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
A. Szymkowiak
中科院分区：
文献类型：
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作者：
J. Spronck;Z. Kaplan;D. Fischer;C. Schwab;A. Szymkowiak
以径向速度探测地球类似物需要10 cm/s的长期精度。限制精度的因素之一是由于狭缝和摄谱仪光学系统的照明变化而导致的仪器轮廓从观察到观察的变化。光纤是天然有效的扰频器。我们的研究重点是了解不同几何形状的纤维的杂乱特性。我们的特点是圆形和八角形光纤的焦比退化，近场和远场分布。我们已经使用一台安装在工作台上的高分辨率光谱仪：耶鲁多普勒诊断设施（YDDF）的特点，这些纤维。
The detection of Earth analogs with radial velocity requires long-term precision of 10 cm/s. One of the factors limiting precision is variation in instrumental profile from observation to observation due to changes in the illumination of the slit and spectrograph optics. Fiber optics are naturally efficient scramblers. Our research is focused on understanding the scrambling properties of fibers with different geometries. We have characterized circular and octagonal fibers in terms of focal ratio degradation, near-field and far-field distributions. We have characterized these fibers using a bench-mounted high-resolution spectrograph: the Yale Doppler Diagnostics Facility (YDDF).