Fan Gao, Xiao Yuan, Xiang Zhang. Sidelobes suppression in angular filtering with volume Bragg gratings combination[J]. Chinese Optics Letters, 2016, 14(6): 060502
- Chinese Optics Letters
- Vol. 14, Issue 6, 060502 (2016)
Fig. 1. Angular selectivities of the VBGs with different (a) grating periods and (b) thicknesses.
Fig. 2. Angular selectivities of the single VBG and combined VBGs with different (a) periods and (b) thicknesses.
Fig. 3. Schematic diagram of the angular selectivity with two combined VBGs.
Fig. 4. Near-field beam profile of the diffracted beams through (a) a single VBG-I and (b) the combined VBGs.
Fig. 5. Schematic diagram of the non-sidelobe angular filter with the combined VBGs.
Fig. 6. Near-field distribution of the (a) modulated beam, (b) diffracted beams through single VBG-I, and (c) through combined VBGs.
Fig. 7. Far-field distribution of (a) modulated beam, (b) diffracted beams through the single VBG-I, and (c) through the combined VBGs.
Fig. 8. Dependence of the PSD with spatial frequency for (a) original beam, (b) modulated beam, (c) filtered beam through the angular filter based on the single VBG-I, and (d) filtered beam through the non-sidelobe angular filter.
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Table 1. Parameters of the VBGs Used in the Experiment
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Table 2. Results of M and C
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