Tianran Zheng, Ying Zhang, Yuanchao Geng, Wanqing Huang, Lanqin Liu, Xibo Sun, Wenyi Wang, Ping Li, Rui Zhang, Dongxia Hu. Theoretical Research of "Intensity Sweep" Laser Beam Smoothing Characteristics[J]. Laser & Optoelectronics Progress, 2018, 55(11): 111405
- Laser & Optoelectronics Progress
- Vol. 55, Issue 11, 111405 (2018)
Fig. 1. Schematic diagram of SSD
Fig. 2. Variation of far-field intensity distribution with time. (a) Nc=0.01; (b) Nc=1; (c) Nc=4
Fig. 3. Variation of far-field intensity distribution with time
Fig. 4. Figures of modulation function. (a) Sinusoidal wave; (b) triangle wave
Fig. 5. Distribution of near-field intensity
Fig. 6. Relationship between nonuniformity of focal spot and time for "intensity sweep" beam and SSD
Fig. 7. Relationship between nonuniformity of focal spot and time with different modulation frequencies. (a) SSD beam; (b) sinusoidal modulation "intensity sweep" beam; (c) triangle wave modulation "intensity sweep" beam
Fig. 8. Influence of modulation frequency on smoothing performance. (a) Smoothing time of 5 ps; (b) smoothing time of 200 ps
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