Design and Simulation of High Brightness Fiber Coupling System of Green Laser Diodes

Bing Ding; Pengfei Zhao; Chengrui Duan; Bojie Lou; Xuechun Lin

doi:10.3788/CJL202148.0501016

Chinese Journal of Lasers, Volume. 48, Issue 5, 0501016(2021)

Design and Simulation of High Brightness Fiber Coupling System of Green Laser Diodes

Bing Ding^1,2, Pengfei Zhao¹, Chengrui Duan³, Bojie Lou^1,2, and Xuechun Lin^1、*

¹Laboratory of All-Solid-State Light Sources, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China

²College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Science, Beijing, 100049, China

³Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China

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Figures & Tables(11)

Fig. 1. Spot distribution of composite beam array on main plane of image side. (a) Spot distribution of closest-packed array; (b) rectangular array spot distribution

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Fig. 2. Sructure of fiber coupled green light LD module

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Fig. 3. Light beam collimation diagram. (a) Ray tracing for fast axis collimation; (b) ray tracing for slow axis collimation; (c) output spot of LD after collimation

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Fig. 4. Divergence angle after collimation

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Fig. 5. Structure diagram of bunch reduction device

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Fig. 6. Bunch reduction effect diagram

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Fig. 7. Light spot pattern of single module. (a) Output light spot before bunch reduction of single group module; (b) output light spot after bunch reduction of single group module

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Fig. 8. Ray tracing of fiber coupling

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Fig. 9. Fiber coupling effect diagram. (a) Focusing spot on fiber facet; (b) spot of optical fiber output

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Table 1. Beam parameters of single tube after collimation
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Table 1. Beam parameters of single tube after collimation
ω_fast /mm ω_slow /mm θ_fast /mrad θ_slow /mrad x_BPP,fast /(mm·mrad) x_BPP,slow /(mm·mrad)
1.100 1.270 0.262 0.750 0.288 0.953

Table 2. Design parameters of focusing lens
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Table 2. Design parameters of focusing lens
Surface Radius of curvature /mm Conic a₂ a₄ a₆ a₈
1 21.168 -5.187×10^-1 0 -3.985×10^-6 -6.695×10^-9 -6.319×10^-12
2 -117.467 0 0 0 0 0

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Bing Ding, Pengfei Zhao, Chengrui Duan, Bojie Lou, Xuechun Lin. Design and Simulation of High Brightness Fiber Coupling System of Green Laser Diodes[J]. Chinese Journal of Lasers, 2021, 48(5): 0501016

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