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中文摘要：
利用开腔He-Ne激光器开展了多纵模及复杂横模的频率特性的实验测量,从扫描干涉仪给出的纵模频谱,可以清晰地认识纵模的物理概念及纵模的变化情况。结合激光光斑图样和频谱,对标准的横模进行精确的鉴别。而对于较复杂的混合模,提出了一种简单可行的分辨方法,计算机模拟和实验结果一致。该研究方法和结论对激光原理及相关课程的理论和实验教学具有一定参考价值。
英文摘要：
In order to realize the abstract concept of the longitudinal and transverse laser modes, and carry out the courses and experiment efficiently, the measurement study of the frequency characteristics of the multi-longitudinal and complex transverse modes was investigated in an open cavity He-Ne lasers. From the spectrum of longitudinal modes obtained by the scanning interferometer, the concept and variation of the longitudinal modes can be realized clearly. With the laser spot pattern and spectrum, the standard transverse modes can be distinguished accurately. While for the complex mixing modes, a simple and feasible method was proposed. The computational simulation results agree well with the experiments. The study methods and corresponding conclusions are of great benefit to the teaching of theoretical and experimental courses in the principle of lasers.
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