Jingqiu ZHUANG, Han XIONG, Tiancheng YU, Jing CHEN, Jinhu ZHENG. Orbital angular momentum detection of vortex beam based on soft-edge aperture[J]. Optics and Precision Engineering, 2022, 30(12): 1394
- Optics and Precision Engineering
- Vol. 30, Issue 12, 1394 (2022)
Fig. 1. Diffraction aperture and transmittance distribution
Fig. 2. Unilateral diffraction effect diagram of a rectangular aperture ring
Fig. 3. Calculation examples and results of CPS and ACPT
Fig. 4. Diffraction patterns for too low and too high Gaussian orders
Fig. 5. Gaussian order corresponding to the maximum combined contrast value under different topological charges
Fig. 6. Diffraction patterns of rectangular aperture with hard-edge or soft-edge and lateral light intensity distribution curves under different topological charges
Fig. 7. Diffraction pattern and lateral light intensity distribution curve of triangular aperture with hard-edge or soft-edge
Fig. 8. Schematic diagram of the experimental light path of the vortex beams diffracted by rectangular aperture with hard-edge or soft-edge
Fig. 9. Experimental light path diagram and physical diagram of rectangular aperture
Fig. 10. Experimental diffraction patterns and lateral light intensity distribution curves of rectangular aperture with hard-edge or soft-edge under different topological charges
Fig. 11. Contrast value and increase of the primary and secondary bright spot intensity in the diffraction pattern of the rectangular aperture with hard-edge or soft-edge obtained from the experiment
Fig. 12. Experimental diffraction patterns of rectangular aperture with hard-edge or soft-edge under different topological charges
Fig. 13. Increase in the contrast value of the primary and secondary bright spot intensity of the experiment and simulation
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Table 1. Simulative and experimental contrast value of the primary and secondary bright spot intensities in the diffraction distribution of the rectangular aperture with hard-edge or soft-edge
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