| 太赫兹时域光谱仪在陶瓷涂层及低压气体检测中的应用 |
| 投稿时间：2019-11-25 修订日期：2019-12-05 点此下载全文 |
| 引用本文：Patrizia Krok,Ole Peters,Sami Wittmann,Datong Wu,邰朝阳,杨海东,傅凌统,邹璞.太赫兹时域光谱仪在陶瓷涂层及低压气体检测中的应用[J].红外,2020,41(2):25~30 |
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| 中文摘要:太赫兹时域光谱仪(Terahertz Time-Domain Spectrometer, THz-TDS)在光谱学、材料表征、安检、通信等众多领域具有广阔的应用前景。首先介绍了一种稳定的1560 nm光纤短脉冲激光器及其用于THz-TDS系统的集成。然后用该THz-TDS系统对几种陶瓷基复合材料(Ceramic Matrix Composites, CMC)进行了无损检测。特别是在对热障涂层的厚度进行检测时，实现了微米量级的检测精度。与传统方法相比，太赫兹波对CMC具有较强的穿透性并且应用灵活，因此可提供更好的解决方案。最后，采用太赫兹异步光学采样(Terahertz ASynchronous OPtical Sampling, THz-ASOPS)系统对低压水蒸气进行了高分辨率光谱分析。结果表明，该系统的光谱分辨率达到10 MHz，比传统的THz-TDS提高了100倍以上。 |
| 中文关键词:超短脉冲激光器 太赫兹时域光谱仪 太赫兹成像 太赫兹频率梳 |
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| Measuring ceramic coating and low-pressure gas spectroscopy using THz-TDS |
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| Abstract:Terahertz time-domain spectroscopy (THz-TDS) could be applied to spectroscopy, material characterization, security check and communication. First, we present a robust and flexible THz-TDS based on a compact fiber short pulse laser for operation at the telecom wavelength of 1560 nm. Then, we use the THz-TDS system for non-destructive testing (NDT) of several ceramic matrix composites (CMC), the measurement thickness reaches μm level accuracy for thermal barrier coating (TBC). Contrast to traditional methods, THz technique provides a better solution due to proper transmission ability of the terahertz wave and transport ability of the THz-TDS. At last, we present the application for high-resolution spectroscopy of low-pressure water vapor using terahertz asynchronous optical sampling (THz-ASOPS) system, the resolution reaches 10 MHz, which is 100 times better than traditional THz-TDS. |
| keywords:ultrashort pulse laser THz time-domain spectroscopy THz imaging THz comb |
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