相干腔增强双梳光谱中复杂分子响应的定量建模
Quantitative modeling of complex molecular response in coherent cavity-enhanced dual-comb spectroscopy.
作者信息
Fleisher Adam J, Long David A, Hodges Joseph T
机构信息
Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, U.S.A.
出版信息
J Mol Spectrosc. 2018;352. doi: 10.1016/j.jms.2018.07.010.
We present a complex-valued electric field model for experimentally observed cavity transmission in coherent cavity-enhanced (CE) multiplexed spectroscopy (i.e., dual-comb spectroscopy, DCS). The transmission model for CE-DCS differs from that previously derived for Fourier-transform CE direct frequency comb spectroscopy [Foltynowicz et al., 163-175 (2013)] by the treatment of the local oscillator which, in the case of CE-DCS, does not interact with the enhancement cavity. Validation is performed by measurements of complex-valued near-infrared spectra of CO and CO by an electro-optic frequency comb coherently coupled to an enhancement cavity of finesse = 19600. Following validation, we measure the 30012 ← 00001 CO vibrational band origin with a combined standard uncertainty of 770 kHz (fractional uncertainty of 4 × 10).
我们提出了一种复值电场模型，用于解释在相干腔增强（CE）复用光谱学（即双梳光谱学，DCS）中实验观测到的腔传输现象。CE-DCS的传输模型与先前为傅里叶变换CE直接频率梳光谱学推导的模型[Foltynowicz等人，163 - 175（2013）]不同，区别在于对本地振荡器的处理，在CE-DCS中，本地振荡器不与增强腔相互作用。通过将电光频率梳与精细度为19600的增强腔相干耦合，对CO和CO的复值近红外光谱进行测量来进行验证。验证之后，我们测量了30012←00001 CO振动带起源，其合成标准不确定度为770 kHz（相对不确定度为4×10）。
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