The simulation and experimental study of the shell structure on laser output power
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摘要: 半导体激光器作为一种精密仪器，壳体结构对激光器工作时输出功率的稳定性至关重要。基于 ANSYS Workbench 软件对壳体进行有限元分析，得到壳体前8阶固有特征频率和相应振型，发现壳体薄弱环节。结合实验验证光路模块安装在壳体薄弱环节与非薄弱环节下，对半导体激光器输出功率的影响。仿真结果表明：壳体振型主要表现为整体与局部变形，薄弱环节主要分布在壳体几何中心位置处。实验结果表明：通过比较壳体不同位置下的实际输出功率，发现壳体薄弱处输出功率最大误差为10%，非薄弱处最大为4%。为后期优化半导体激光器的结构设计与提高其输出功率的稳定性提供参考。Abstract: As a precision instrument, the shell structure of the semiconductor laser is crucial to the stability of the laser’s output power. Based on the finite element analysis of the shell with the software ANSYS Workbench, the first 8 natural characteristic frequencies and corresponding vibration modes of the shell have been obtained, and the weak links of the shell have been found. The experiment verifies the effect of the optical path module installed in the weak and non-weak parts of the shell on the output power of the semiconductor laser. The simulation results show that the vibration mode of the shell is characterized by global and local deformation, and the weak links are mainly located at the geometric center of the shell. The experimental results show that the maximum error of the output power is 10% in the weak part while 4% in the non-weak part by comparing the actual output power under different positions of the shell. It provides a reference for optimizing the structure design of the semiconductor laser and improving the stability of its output power.
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Key words:
- semiconductor laser shell /
- modal analysis /
- natural frequency /
- output power
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表 3 光路模块不同安装位置输出功率测试
面板设置
功率/W实际工作
电流/A位置1实际
输出功率/W误差 位置2实际
输出功率/W误差/(%) 5 1.81 4.8 4.0% 4.5 10.0 10 2.70 10.0 0 9.7 3.0 15 3.54 14.5 3.3% 13.9 7.3 20 4.32 19.6 2.0% 18.8 6.0 25 5.08 24.4 2.4% 23.7 5.2 30 5.83 29.5 1.7% 28.8 4.0 35 6.61 34.2 2.3% 33.7 3.7 40 7.42 39.6 1.0% 38.6 3.5 
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