Super-Resolution Terahertz Wave Spectrometer

被引：0
作者：
Wei B. [1 ]
Yuan H. [2 ,3 ]
Zhao Y. [3 ]
Zhang C. [4 ]
机构：
[1] Office of Academic Affairs, Jilin Institute of Chemical Technology, Jilin, 132022, Jilin
[2] Physikalisches Institut, Johann Wolfgang Goethe-Universität, Frankfurt am Main
[3] Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optoelectronics, Beijing Institute of Technology, Beijing
[4] Key Laboratory of Terahertz Optoelectronics, Department of Physics, Capital Normal University, Beijing
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2019年 / 46卷 / 06期
关键词：
Interference; Measurement; Spectroscopy; Super-resolution; Terahertz;
D O I：
10.3788/CJL201946.0614036
中图分类号：
学科分类号：
摘要：
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 self-developed broadband GaN array detector. The proposed spectrometer has high precision and can achieve super-resolution. 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 470 to 720 GHz, 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 100 MHz and 0.1%, respectively. These values are 20 times the resolution and accuracy limits under the same detection conditions. © 2019, Chinese Lasers Press. All right reserved.
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