Broadband mid-IR fiber optics for heterodyne spectroscopy in solar system exploration missions
Broadband mid-IR fiber optics for heterodyne spectroscopy in solar system exploration missions
复制标题
用于太阳系探索任务中外差光谱的宽带中红外光纤
DOI：
10.1117/12.2561939
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
I. Murata and A. Yamazaki
中科院分区：
文献类型：
--
作者：
H. Nakagawa;S. Tsukada;Y. Kasaba;Y. Hirahara;Y. Matsuura;T. Katagiri;I. Murata and A. Yamazaki
提出了一种适用于中红外波段红外外差光谱的新型空心光纤。实验室测量证实了用空心光纤外差探测获得的激光发射谱线和系统噪声温度的光谱特性。利用空心光纤作为激光器的外差系统，在实验装置上获得了低于3000 K的系统噪声温度，仅高于量子极限~ 100%。中空光纤允许以足够的效率进行外差检测。这允许简化制造，提供甚至更多的重量减轻。需要进一步的研究，使用空心光纤的目标源。
We demonstrate a new design hollow optical fiber suitable for use on IR heterodyne spectroscopy in mid-infrared wavelength region. The spectral feature of the laser emission line and the system noise temperature obtained by heterodyne detection with hollow optical fiber is confirmed by a laboratory measurement. The system noise temperature less than 3000 K obtained by the experimental setup with the CO2laser-based heterodyne system led by a hollow optical fiber is only ~100 % above the quantum limit. The hollow optical fiber allows heterodyne detection with a sufficient efficiency. This permits simplified fabrication, provides even more weight reduction. Further investigation is required for use of hollow optical fiber on the target source.