中国物理B ›› 2016, Vol. 25 ›› Issue (8): 80702-080702.doi: 10.1088/1674-1056/25/8/080702
Tie-Lin Lu(卢铁林), Hui Yuan(袁慧), Ling-Qin Kong(孔令琴), Yue-Jin Zhao(赵跃进), Liang-Liang Zhang(张亮亮), Cun-Lin Zhang(张存林)
Tie-Lin Lu(卢铁林)1, Hui Yuan(袁 慧)1, Ling-Qin Kong(孔令琴)1, Yue-Jin Zhao(赵跃进)1, Liang-Liang Zhang(张亮亮)2, Cun-Lin Zhang(张存林)2
摘要: A system for measuring terahertz spectrum is proposed based on optical interferometer theory, and is experimentally demonstrated by using a backward-wave oscillator as the terahertz source. A high-resolution, high-precision interferometer is constructed by using a pyroelectric detector and a chopper. The results show that the spectral resolution is better than 1 GHz and the relative error of frequency is less than 3%. The terahertz energy density distribution is calculated by an inverse Fourier transform and tested to verify the feasibility of the interferometric approach. Two kinds of carbon-fiber composites are imaged. The results confirm that the interferometer is useful for transmission imaging of materials with different thickness values.
中图分类号: (Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors)