Dual-comb spectroscopy in the spectral fingerprint region using OPGaP optical parametric oscillators
Dual-comb spectroscopy in the spectral fingerprint region using OPGaP optical parametric oscillators
复制标题
DOI：
10.1364/oe.25.032713
复制
发表时间：
2017-12-25
期刊：
影响因子：
3.8
通讯作者：
Reid, Derryck T.
中科院分区：
文献类型：
--
作者：
Kara, Oguzhan;Maidment, Luke;Reid, Derryck T.
新材料取向磷化镓（OPGaP）在光谱指纹区域6至12 μ m范围内实现相干和宽带红外光谱，获得最大的分子吸收截面，并允许敏感，定量和物种特异性测量。在这里，我们展示了如何使用飞秒光学参量振荡器（opo）将双梳光谱（一种高速傅立叶变换光谱，不涉及移动部件，具有非常高的分辨率）扩展到6-8 μ m波段。通过在与OPO梳相互退相干时间相当的时间内获取双梳干涉图，我们实现了基于互相关的光谱平均，以大约0.3 cm（-1）的分辨率在1285 ~ 1370 cm（-1）和1500 ~ 1585 cm（-1）范围内获得H2O和CH4的高保真光谱。由美国光学学会根据知识共享署名4.0许可发布。这项工作的进一步分发必须保持作者的归属和已发表文章的标题，期刊引用和DOI。
The new material orientation patterned gallium phosphide (OPGaP) enables coherent and broadband infrared spectroscopy in the spectral fingerprint region from 6 to 12 mu m, accessing the largest molecular absorption cross-sections and permitting sensitive, quantitative and species-specific measurements. Here, we show how dual-comb spectroscopy-a form of high-speed Fourier-transform spectroscopy involving no moving parts and capable of very high resolutions-can be extended to the 6-8 mu m wavelength band using femtosecond optical parametric oscillators (OPOs). By acquiring dual-comb interferograms in a time comparable with the mutual decoherence time of the OPO combs we implement cross-correlation-based spectral averaging to obtain high-fidelity spectra of H2O and CH4 at approximately 0.3 cm(-1) resolutions from 1285 to 1370 cm(-1) and 1500-1585 cm(-1). Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.