Abstract The positioning error of optical components is one of the crucial factors affecting the beam quality for high-power semiconductor laser diode and the fiber coupling efficiency. This paper, derives the evaluation equations for the influence of collimator positioning error of single emitter laser array on light intensity distribution, and explores the effect of positioning error on the shape and position of beam spot through simulation. Moreover, the effects of positioning error on the coupling efficiency are researched by the experiment and are supported by simulations. The results show that the most influential positioning error, a 4 μ m displacement error in the y-axis of the fast axis collimator will decrease the coupling efficiency by 78.5%. Besides, the sensitivity analysis of each positioning error on coupling efficiency is investigated.

中文翻译：

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激光准直器定位误差对光束形状和耦合效率的影响

摘要 光学元件的定位误差是影响大功率半导体激光二极管光束质量和光纤耦合效率的关键因素之一。本文推导了单发射激光器阵列准直器定位误差对光强分布影响的评价方程，并通过仿真探讨了定位误差对光斑形状和位置的影响。此外，通过实验研究了定位误差对耦合效率的影响，并得到了仿真的支持。结果表明，影响最大的定位误差，快轴准直器 y 轴 4 μm 的位移误差会使耦合效率降低 78.5%。除了，