Optical fiber modal noise in the 0.8 to 1.5 micron region and implications for near infrared precision radial velocity measurements
Optical fiber modal noise in the 0.8 to 1.5 micron region and implications for near infrared precision radial velocity measurements
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0.8 至 1.5 微米区域的光纤模态噪声及其对近红外精密径向速度测量的影响
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发表时间：
2012
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影响因子：
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通讯作者：
S. Redman
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作者：
Keegan S. McCoy;L. Ramsey;S. Mahadevan;S. Halverson;S. Redman
光纤中的模式噪声已被证明限制了在光纤耦合的高分辨率光谱仪中可实现的信噪比，如果不通过模式加扰技术来缓解它的话。随着波长的增加，模式噪声变得明显变得更加重要，并对正在建设或计划用于搜索凉爽M矮星周围行星的新一代近红外精密径向光谱仪构成风险，这些恒星的大部分光在近红外中发射。我们介绍了宾夕法尼亚州立大学测试的实验结果，该结果表征了1.5微米远可见范围内的模式噪声，以及我们使用机械加扰器获得的模式扰乱程度。这些努力是宾夕法尼亚州立大学目前正在开发的宜居区行星探测器光谱仪风险缓解努力的一部分。
Modal noise in fibers has been shown to limit the signal-to-noise ratio achievable in fiber-coupled, high-resolution spectrographs if it is not mitigated via modal scrambling techniques. Modal noise become significantly more important as the wavelength increases and presents a risk to the new generation of near-infrared precision radial spectrographs under construction or being proposed to search for planets around cool M-dwarf stars, which emit most of their light in the NIR. We present experimental results of tests at Penn State University characterizing modal noise in the far visible out to 1.5 microns and the degree of modal scrambling we obtained using mechanical scramblers. These efforts are part of a risk mitigation effort for the Habitable Zone Planet Finder spectrograph currently under development at Penn State University.