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超分辨太赫兹波频谱仪系统

Super-Resolution Terahertz Wave Spectrometer
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摘要 基于光学干涉理论,提出了一种超分辨太赫兹波频谱仪系统。干涉系统采用的是自主研制的宽带氮化镓阵列探测器,用于信号的多点同时探测。所提出的太赫兹波频谱仪具有较高的精度,可实现超分辨。利用阵列探测器得到的二维强度分布,可以测定待测光源的光束质量。利用倍频链发射源产生的470~720GHz连续太赫兹波对频谱仪进行验证。在75mm探测距离下,频谱仪的频谱分辨率为100MHz,测量精度为0.1%,该精度是相同探测距离下分辨极限及精度的20倍。 Herein,a super-resolution terahertz wave spectrometer system is proposed based on optical interference theory.The interference system can be used for the multipoint simultaneous detection of signals based on a selfdeveloped broadband GaN array detector.The proposed spectrometer has high precision and can achieve superresolution. The beam quality of the source to be tested can be measured based on the two-dimensional intensity distribution obtained by the proposed array detector.Continuous terahertz waves,generated by a multiplier-chain emission source with a frequency range from 470to 720GHz,are used as the testing source to verify the proposed spectrometer.At a detection distance of 75 mm,the spectral resolution and the measurement accuracy are determined to be 100MHz and 0.1%,respectively.These values are 20times the resolution and accuracy limits under the same detection conditions.
作者 魏白光 袁慧 赵跃进 张存林 Wei Baiguang;Yuan Hui;Zhao Yuejin;Zhang Cunlin(Office of Academic Affairs,Jilin Institute of Chemical Technology,Jilin,Jilin 132022,China;Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology,School of Optoelectronics,Beijing Institute of Technology,Beijing 100081,China;Key Laboratory of Terahertz Optoelectronics,Ministry of Education of China,Department of Physics,Capital Normal University,Beijing 100048,China)
出处 《中国激光》 EI CAS CSCD 北大核心 2019年第6期316-321,共6页 Chinese Journal of Lasers
基金 吉林化工学院项目(2018016).
关键词 测量 太赫兹 频谱仪 干涉 超分辨 measurement terahertz spectroscopy interference super-resolution
作者简介 袁慧,E-mail:yuan@physik.uni-frankfurt.de.
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