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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(1):39~45
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作者单位E-mail
Patrizia Krok Menlo Systems GmbH p.krok@menlosystems.com 
Ole Peters Menlo Systems GmbH  
Sami Wittmann Menlo Systems GmbH  
Datong Wu Menlo Systems GmbH  
邰朝阳 索雷博光电科技(上海)有限公司 ztai@thorlabs.com 
杨海东 索雷博光电科技(上海)有限公司  
傅凌统 Menlo Systems GmbH  
邹璞 Menlo Systems GmbH  
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。介绍了一种稳定的波长为1560 nm的光纤短脉冲激光器以及一种基于该激光器的THz-TDS系统。然后用该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(Thermal Barrier Coating,TBC)的厚度进行检测时,实现了微米量级的精度。相比于传统方法,太赫兹波对CMC具有较强的穿透性并且应用灵活,因此提供了更好的解决方案。最后使用太赫兹异步光学采样系统(Terahertz Asynchronous Optical Sampling, THz-ASOPS)对低压水蒸气进行了高分辨率光谱分析。结果表明,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
 
Application on the Detection of Ceramic Coating and Low-Pressure Gas Based on THz-TDS
Abstract:The terahertz time-domain spectrometer(THz-TDS)has a promising prospect in many fields such as spectroscopy, material characterization, security check and communication. Firstly, a stable fiber short pulse laser with a wavelength of 1560 nm and how to integrate the laser into the THz-TDS system are introduced.Then the THz-TDS system is used for nondestructive testing of several kinds of ceramic matrix composites(CMC). Especially the thickness accuracy of the thermal barrier coating reaches m level. Compared with the traditional methods, the terahertz wave provides a better solution because it has stronger penetration to CMC and can be applied flexibly. Finally, the high-resolution spectral analysis of low-pressure water vapor is accomplished based on the terahertz asynchronous optical sampling(THz-ASOPS).The spectral resolution reaches 10MHz, which is more than 100 times higher than the traditional THz-TDS.
keywords:ultrashort pulse laser  THz time-domain spectrometer  THz imaging  THz comb
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