Application of Gaussian Beam Propagation Theory and Nonlinear Fitting Technology in Automatic Production of Optical Fiber Collimator

Xiang Li; Qiang Zhao; Lei Guo; Ying Li

doi:10.3788/CJL240811

Chinese Journal of Lasers, Volume. 52, Issue 2, 0205001(2025)

Application of Gaussian Beam Propagation Theory and Nonlinear Fitting Technology in Automatic Production of Optical Fiber Collimator

Xiang Li¹, Qiang Zhao^2、*, Lei Guo², and Ying Li¹

Author Affiliations

¹College of Physics and Optoelectronic Engineering, Faculty of Information Science and Engineering, Ocean University of China, Qingdao 266100, Shandong , China

²Qingdao Primanex Corporation, Qingdao 266555, Shandong , China

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Figures & Tables(7)

Fig. 1. Principle of optical fiber collimator by spot method

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Fig. 2. Rolling optimization of LM algorithm flow based on Gaussian beam transmission theory

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Fig. 3. Comparison of moving points between rolling fitting LM system and commercially available system. (a) Commercially available system optimization of A-70 collimator data; (b) rolling fitting LM system to optimize A-70 collimator data

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Fig. 4. Comparison of production time and spot accuracy between commercial system and rolling fitting LM system

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Fig. 5. Production time and accuracy of different types of collimators at different detection distances

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Table 1. Influence of A-70 collimator parameter tolerance on spot diameter

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Table 1. Influence of A-70 collimator parameter tolerance on spot diameter

Parameter	Value	Tolerance	Influence
Lens length L /μm	3120	±40	±28
Lens curvature R /μm	1419	±10	±12
Lens refractive index n	1.7434	±0.0005	±1
Detection distance z /mm	58	±1	±0.002
Fiber mode field radius w₀ /μm	5.2	±0.25	±14

Table 2. Influence of initial value points on production
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Table 2. Influence of initial value points on production
Number of initial points Average production time /s First fit rate /%
10 23.5 100
9 22.6 100
8 22.2 94.2
7 21.6 94.2
6 20.5 94.2
5 18.7 91.4
4 18.1 91.4

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Xiang Li, Qiang Zhao, Lei Guo, Ying Li. Application of Gaussian Beam Propagation Theory and Nonlinear Fitting Technology in Automatic Production of Optical Fiber Collimator[J]. Chinese Journal of Lasers, 2025, 52(2): 0205001

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