An interference elimination method for CW-THz reflection imaging

Yifan Wang; Yuye Wang; Degang Xu; Limin Wu; Guoqiang Wang; Bozhou Jiang; Taoying Yu; Chao Chang; Tunan Chen; Jianquan Yao

doi:10.1117/12.2575719

10 October 2020 An interference elimination method for CW-THz reflection imaging

Yifan Wang, Yuye Wang, Degang Xu, Limin Wu, Guoqiang Wang, Bozhou Jiang, Taoying Yu, Chao Chang, Tunan Chen, Jianquan Yao

Author Affiliations +

Proceedings Volume 11559, Infrared, Millimeter-Wave, and Terahertz Technologies VII; 115591B (2020) https://doi.org/10.1117/12.2575719
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

We proposed a novel interference elimination method for CW-THz reflection imaging. Based on the study of interference mechanism in the imaging window, inverse processing was proposed to realize the interference elimination. Theoretical calculation showed that the interference phenomenon was closed related to the characteristics of imaging window. The refractive index and thickness of the window were the two main factors for the interference. Moreover, polarization was also taken into consideration for the CW-THz reflection imaging because the reflectivities of the s and p polarized waves were different from each other. This method was applied in different imaging systems for the demonstration of its feasibility. The high resistivity float-zone silicon (HRFZ-Si) plate was employed as the imaging window in the normal incidence system with a terahertz quantum cascade laser (THz-QCL) operating at 4.3THz. The oblique system employed quartz plate as the imaging window with an optical pumped THz laser operating at 2.52THz. Pork and liquid samples of water and edible oils were chosen as the imaging samples to demonstrate the interference elimination method.

Conference Presentation

Citation Download Citation

Yifan Wang, Yuye Wang, Degang Xu, Limin Wu, Guoqiang Wang, Bozhou Jiang, Taoying Yu, Chao Chang, Tunan Chen, and Jianquan Yao "An interference elimination method for CW-THz reflection imaging", Proc. SPIE 11559, Infrared, Millimeter-Wave, and Terahertz Technologies VII, 115591B (10 October 2020); https://doi.org/10.1117/12.2575719

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