Acta Photonica Sinica, Volume. 49, Issue 12, 83(2020)
Analysis of Influence of Spike on Phase Retrieval Accuracy of Doppler Asymmetric Spatial Heterodyne Spectrometer and Correction Method
Figures & Tables(10)
Fig. 1. Schematic of the Doppler asymmetric spatial heterodyne interferometer
Fig. 3. Relationship between phase error and spike center position and intensity
Fig. 4. Relationship between phase error and spike center intensity and peak width
Fig. 5. Flow chart of nearest neighbor comparison median filtering algorithm
Fig. 7. The correction effects of five algorithms on spike are analyzed
Table 1. Principle parameters of DASH
View tableView in ArticleTable 1. Principle parameters of DASH
Parameter Value OPD0 50 mm Spectral resolution 0.78 cm-1 Working wavelength 630.5 nm Interferogram average digital number 369.92 Interferogram average SNR 17.39 Interferogram sample count 1 024
Table 2. Experimental and theoretical calculation of inversion phase error
View tableView in ArticleTable 2. Experimental and theoretical calculation of inversion phase error
Data1 Data2 Data3 Data4 Data5 Data6 Data7 Experimental phase error /rad 0.154 6 0.027 1 0.020 2 0.013 9 0.006 8 -0.004 2 -0.002 1 Theoretical phase error /rad 0.154 3 0.026 9 0.021 3 0.013 8 0.006 1 -0.004 2 -0.002 2
Table 3. Comparison of inversion phase results of spike processing algorithms
View tableView in ArticleTable 3. Comparison of inversion phase results of spike processing algorithms
Data1 Data2 Data3 Data4 Data5 Data6 Data7 Standard inversion phase /rad 0.306 8 0.780 6 0.194 5 0.025 5 1.493 3 0.724 4 0.789 2 Original inversion phase /rad 0.152 1 0.807 7 0.214 7 0.011 6 1.500 2 0.728 5 0.791 4 Inversion phase of mean filtering method /rad 0.243 6 0.801 2 0.200 7 0.018 9 1.494 5 0.727 2 0.791 1 Inversion phase of median filtering method /rad 0.268 5 0.800 7 0.197 8 0.020 3 1.499 6 0.725 1 0.790 3 Inversion phase of global threshold method /rad 0.311 6 0.779 8 0.192 2 0.028 1 1.501 3 0.722 3 0.788 3 Inversion phase of the new method /rad 0.306 4 0.780 9 0.194 9 0.026 0 1.493 5 0.724 2 0.789 0
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Ting-ting YU, Yu-tao FENG, Di FU, Xuan WANG, Chen SUN, Qing-lan BAI. Analysis of Influence of Spike on Phase Retrieval Accuracy of Doppler Asymmetric Spatial Heterodyne Spectrometer and Correction Method[J]. Acta Photonica Sinica, 2020, 49(12): 83
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Category: Spectroscopy
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Published Online: Mar. 11, 2021
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