Simulation study of strong light interference effect in temporally and spatially modulated Fourier transform imaging spectrometer

Meng Fanxin; Xing Zhongyang; Xu Zhongjie; Cheng Xiangai

doi:10.11884/HPLPB202234.210342

Volume 34 Issue 1

Jan. 2022

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Meng Fanxin, Xing Zhongyang, Xu Zhongjie, et al. Simulation study of strong light interference effect in temporally and spatially modulated Fourier transform imaging spectrometer[J]. High Power Laser and Particle Beams, 2022, 34: 011010. doi: 10.11884/HPLPB202234.210342

Citation:

Meng Fanxin, Xing Zhongyang, Xu Zhongjie, et al. Simulation study of strong light interference effect in temporally and spatially modulated Fourier transform imaging spectrometer[J]. High Power Laser and Particle Beams, 2022, 34: 011010. doi: 10.11884/HPLPB202234.210342

Citation:

Meng Fanxin, Xing Zhongyang, Xu Zhongjie, et al. Simulation study of strong light interference effect in temporally and spatially modulated Fourier transform imaging spectrometer[J]. High Power Laser and Particle Beams, 2022, 34: 011010. doi: 10.11884/HPLPB202234.210342

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Simulation study of strong light interference effect in temporally and spatially modulated Fourier transform imaging spectrometer

doi: 10.11884/HPLPB202234.210342

Meng Fanxin^{1, 2, 3
,},
Xing Zhongyang^{1, 2, 3},
Xu Zhongjie^{1, 2, 3},
Cheng Xiangai^{1, 2, 3
,
,}

1.
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073
2.
State Key Laboratory of Pulsed Power Laser Technology, Changsha 410073
3.
Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha 410073

Received Date: 2021-08-04
Rev Recd Date: 2021-12-17

Available Online: 2021-12-21

Publish Date: 2022-01-15

Abstract

Abstract

This paper presents the computational studies on the effect and mechanism of strong light interference in the large aperture static interference imaging spectrometer. First, we generated images with simplified ground targets and computed the corresponding original interference imaging pattern. Then, we simulated a 830 nm single-wavelength laser and a super continuum laser respectively, to analyze the typical interference effects. During the process, it was assumed that the original spectral information could be resolved only when the spectral angle is lower than 30°. For the 830 nm laser interference, the spectral angle would reach 30° when the ratio of laser interference imaging peak to the target imaging peak was 0.2∶1, but the interference effect could be effectively filtered by the 830 nm filter. In the case of super continuum laser interference, the spectral angle was finally stabilized at 21° without considering the saturation threshold, but the detector could be oversaturated more easily. Overall, both 830 nm laser and super continuum laser can disable the spectrum recovery process, but the mechanisms are different since the former one shifts the characteristic peak of the spectrum and the latter makes the interference fringes unrecognizable.
- spectral imaging technology,
- large aperture static interference imaging,
- spectral restoration,
- laser interference,
- interference effect evaluation

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References(30)

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