Design and Analysis of Surface Parameters of Aspheric Lenses System Converting Gaussian Beam to Flattop Beam

Kai, 陈凯 Chen; Pingxue, 李平雪 Li; Meng, 陈檬 Chen; Xuexia, 张雪霞 Zhang; Zhen′ao, 白振岙 Bai; Gang, 李港 Li

doi:10.3788/lop48.032201

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2023

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“…In Ref [Borghi 2001;Kai et al 2011], different β and R 0 values will affect the state of the emergent beam spot. The larger the β is, the closer the beam cross-section is to a rectangle.…”

Section: The Basic Theoretical Analysismentioning

confidence: 99%

Uniformization and collimation of a high-power blue EESLD

Luo

Geng

et al. 2023

Preprint

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Delivering the highest power among the visible diodes, semiconductor lasers at 450 nm have been extensively applied in biomedical and micro-processing fields. However, the edge-emitting inherence that gives birth to the divergent and ununiform profile largely prohibits the practice due to the fiber coupling and pumping difficulty. To address these challenges, we propose and demonstrate a scheme that is both robust and cost-effective. A laser spot with 3×3 mm2 profile, 0.86 mrad divergence and 87.28% uniformity is experimentally achieved. Further simulation reveals that the coupling efficiency into a S460-HP single-mode fiber by a 20-mm focus-lens can reach 58.35%.

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Section: The Basic Theoretical Analysismentioning

confidence: 99%