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| 金属薄膜边缘诱导改变谐振激光模式实验 |
| Experiment of the change of resonance laser modes induced by the edge of metal film |
| 投稿时间：2019-08-14 |
| DOI：10.3969/j.issn.1005-5630.2020.03.005 |
| 中文关键词: 氦氖激光谐振腔 金属薄膜边缘 干扰 激光模式 |
| 英文关键词:He-Ne laser resonator the edge of metal film interference laser mode |
| 基金项目:国家重点研发计划（2018YFC1313800） |
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| 摘要点击次数: 2587 |
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| 中文摘要: |
| 为研究在不同方向移动的金属薄膜边缘的干扰情况下谐振激光模式的改变现象，调节定制的氦氖激光谐振腔产生高阶高斯光束，用金属薄膜边缘进行干扰，并用CCD相机对光束的演变过程进行详细记录。随着金属薄膜边缘沿X和Y正方向上位移的增加，出射的激光模式由高阶向低阶模式演化，然后变成基模，变弱直到消失。原始激光模式的阶数越高，它的演化模式光斑形状越丰富。当用金属薄膜上方边缘向Y轴正向缓慢移动进行干扰时，激光模式的演化规则是最后趋于沿X轴的分裂模式；当用金属薄膜的左侧边缘向X轴正向缓慢移动进行干扰时，激光模式的演化规则最后趋于沿Y轴的分裂模式。 |
| 英文摘要: |
| In order to study the phenomenon of resonance laser mode change under the interference of the edge of a metal film moving in different directions, the customized He-Ne laser resonator is adjusted to generate a high-order Gaussian beam, a metal film edge is used to interfere with the beam, and a CCD camera is used to record the evolution of the beam in detail. As the displacement of the edge of the metal film increases along the X and Y directions, the light mode appears to evolve from a high-order mode to a low-order one, and then becomes a fundamental mode, which weakens until disappear. The higher the order of the original laser mode, the richer the pattern of its evolution mode. When the upper edge of the metal film is slowly moved toward the Y axis to interfere, the laser mode is finally to split along the X axis. When the left edge of the metal film is slowly moved toward the X axis to interfere, the laser mode finally tends to be a split mode along the Y axis. |
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