Xueqiang Li, Fang Wu, Shuang Gong, Yang Bu. Complex Coherence Modulation of Laser Field Based on Random Microlens Array[J]. Chinese Journal of Lasers, 2023, 50(19): 1905002
- Chinese Journal of Lasers
- Vol. 50, Issue 19, 1905002 (2023)
Fig. 1. Thiessen polygons and random microlens arrays based on Thiessen polygonal arrangements. (a) Thiessen polygons; (b) random microlens array
Fig. 2. Structure diagram of random microlens array. (a) Three-dimensional diagram; (b) surface height fluctuation; (c) two-dimensional diagram
Fig. 3. Simulation diagram. (a) Optics structure; (b) initial beam divergence angle; (c) beam divergence angle after random microlens array
Fig. 4. Microlens unit structure
Fig. 5. Divergence angle for different microlens element parameters
Fig. 6. Young's interferometry with double holes
Fig. 7. Interference fringes and fringe intensity distribution. (a) Without random microlens array; (b) through static random microlens array; (c) through rotating random microlens array (60 r/min)
Fig. 8. Interference fringe patterns at different rotation speeds. (a) 300 r/min; (b) 600 r/min; (c) 1200 r/min; (d) 2400 r/min
Fig. 9. Schematic of experimental setup
Fig. 10. Surface profile of random microlens array. (a) Observation by microscope; (b) observation by interferometer
Fig. 11. Diagram of divergence angle measurement
Fig. 12. Experimental interference fringe patterns. (a) Without random microlens array; (b) through static random microlens array; (c) through rotating random microlens array (60 r/min)
Fig. 13. Experimental interference fringe patterns at different rotation speeds. (a) 300 r/min; (b) 600 r/min; (c) 1200 r/min; (d) 2400 r/min
Fig. 14. Image of double-hole light spots
Fig. 15. Modulus of complex coherence varies with rotation speed
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Table 1. Double-hole light intensity ratio and modulus of complex coherence at different rotation speeds
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Table 2. Percentage decrease of modulus of complex coherence with every 60 r/min increase in different speed ranges
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