arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1603.09680physics.optics
收藏

基于双共振光学参量振荡器的3-5.4 μm光学频率梳光谱

Optical frequency comb spectroscopy at 3-5.4 μm with a doubly resonant optical parametric oscillator

Amir Khodabakhsh, Venkata Ramaiah-Badarla, Lucile Rutkowski, Alexandra C. Johansson, Kevin F. Lee, Jie Jiang, Christian Mohr, Martin E. Fermann, Aleksandra Foltynowicz

摘要:

提出了一种多功能的中红外梳状光谱系统,该系统基于一个可在3-5.4 μm范围内调谐的双共振光学参量振荡器和两种检测方法:傅里叶变换光谱仪(FTS)和游标光谱仪。利用带有多程池的FTS,我们分别测量了CH $_4$和NO在~3.3 μm和~5.2 μm处的高精度宽带吸收光谱,以及空气中CH $_4$、CO、CO $_2$和H $_2$ O在信号和闲频波长范围内的吸收光谱。该系统的品质因数为10 $^{-8}$ cm $^{-1}$ Hz $^{-1/2}$/光谱元件的数量级,多线拟合产生CH $_4$、NO和CO的最小可检测浓度为10-20 ppb Hz $^{-1/2}$。对于中红外,我们首次使用低精细度增强腔、光栅和单个检测器执行连续滤波游标光谱,并在~3.3 μm处测量环境空气中CH $_4$和H $_2$ O的吸收光谱。

英文摘要:

We present a versatile mid-infrared frequency comb spectroscopy system based on a doubly resonant optical parametric oscillator tunable in the 3-5.4 μm range and two detection methods, a Fourier transform spectrometer (FTS) and a Vernier spectrometer. Using the FTS with a multipass cell we measure high-precision broadband absorption spectra of CH$_4$ and NO at ~3.3 μm and ~5.2 μm, respectively, and of atmospheric species (CH$_4$, CO, CO$_2$ and H$_2$O) in air in the signal and idler wavelength range. The figure of merit of the system is on the order of 10$^{-8}$ cm$^{-1}$ Hz$^{-1/2}$ per spectral element, and multiline fitting yields minimum detectable concentrations of 10-20 ppb Hz$^{-1/2}$ for CH$_4$, NO and CO. For the first time in the mid-infrared, we perform continuous-filtering Vernier spectroscopy using a low finesse enhancement cavity, a grating and a single detector, and measure the absorption spectrum of CH$_4$ and H$_2$O in ambient air at ~3.3 μm.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑