论文标题
具有交叉分散光谱仪和中红外频率梳子的一氧化二氮同位素的精确光谱
Precision Spectroscopy of Nitrous Oxide Isotopocules with a Cross-Dispersed Spectrometer and Mid-Infrared Frequency Comb
论文作者
论文摘要
作为有效的温室气和臭氧耗尽的剂，一氧化二氮（N $ _2 $ O）在全球气候中起着至关重要的作用。有效的缓解措施依赖于了解可以通过同位素分析来支持的全球来源和下沉。我们提出了一个交叉分散的光谱仪，再加上中红外频率梳子，能够同时监视所有单独替代的，稳定的同位素变体N $ _2 $ o。讨论了仪器线形功能和数据处理的严格评估。光谱仪的实验室表征显示了亚GHz光谱分辨率，平均精度为$ 7.4 \ times10^{ - 6} $，用于1 s的分数同位素丰度检索。
As a potent greenhouse gas and ozone depleting agent, nitrous oxide (N$_2$O) plays a critical role in the global climate. Effective mitigation relies on understanding global sources and sinks which can be supported through isotopic analysis. We present a cross-dispersed spectrometer, coupled with a mid-infrared frequency comb, capable of simultaneously monitoring all singly substituted, stable isotopic variants of N$_2$O. Rigorous evaluation of the instrument lineshape function and data treatment are discussed. Laboratory characterization of the spectrometer demonstrates sub-GHz spectral resolution and an average precision of $7.4\times10^{-6}$ for fractional isotopic abundance retrievals in 1 s.
