论文标题
同位素比双弯曲光谱仪
Isotope Ratio Dual-Comb Spectrometer
论文作者
论文摘要
我们证明了双弯曲光谱用于同位素比测量值。我们表明，自由运行的近红外双弯曲光谱仪的分析光谱范围可以扩展到差异频率产生到适合此类测量的特定光谱区域的中红外，尤其是相对同位素比$δ{}^{}^{13} $ c。进行的测量值在几天内具有非常好的可重复性，标准偏差低于2 $ \ unicode {x2030} $，用于几十秒钟的记录时间，并且结果与使用同位素比率质谱仪获得的测量值兼容。我们的设置还显示了靶向几种化学物种而无需进行任何重大修饰的可能性，可用于测量其他同位素比。进一步的改进可能会减少测量值的不确定性，因此光谱仪可以与当前在市场上可用的同位素比率谱仪竞争。
We demonstrate the use of dual-comb spectroscopy for isotope ratio measurements. We show that the analysis spectral range of a free-running near-infrared dual-comb spectrometer can be extended to the mid-infrared by difference frequency generation to target specific spectral regions suitable for such measurements, and especially the relative isotopic ratio $δ{}^{13}$C. The measurements performed present a very good repeatability over several days with a standard deviation below 2$\unicode{x2030}$ for a recording time of a few tens of seconds, and the results are compatible with measurements obtained using an isotope ratio mass spectrometer. Our setup also shows the possibility to target several chemical species without any major modification, which can be used to measure other isotopic ratios. Further improvements could decrease the uncertainties of the measurements, and the spectrometer could thus compete with isotope ratio spectrometers currently available on the market.
