太赫兹时域光谱仪在陶瓷涂层及低压气体检测中的应用  

Application on the Detection of Ceramic Coating and Low-Pressure Gas Based on THz-TDS

作　　者：Patrizia Krok Ole Peters Sami Wittmann Datong Wu 邰朝阳 杨海东 傅凌统 邹璞 KROK Patrizia;PETERS Ole;WITTMANN Sami;WU Datong;TAI Zhao-yang;YANG Hai-dong;FU Ling-tong;ZOU Pu(Menlo Systems GmbH, Munich 82152, Germany;Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Munich 80335, Germany;Thorlabs China, Shanghai 200031, China)

机构地区：[1]Menlo Systems GmbH,慕尼黑82152 [2]慕尼黑应用技术大学应用科学与机电学院,慕尼黑80335 [3]索雷博光电科技(上海)有限公司,上海200031

出　　处：《红外》2020年第1期39-45,共7页Infrared

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。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.

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 

分 类 号：TN216[电子电信—物理电子学]