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偏振光谱技术是一种高灵敏度和高分辨的光谱技术。提出一种基于可调平衡探测偏振光谱的实验方法,研究了不同偏振面下偏振光谱线型的变化趋势,观测到光谱线型随偏振片旋转产生的翻转现象。通过结合偏振理论与平衡探测理论,对线型翻转现象进行了解释,理论与实验符合得很好。同时,研究了色散型谱线峰峰值与抽运光强之间的依赖关系,发现在抽运探测光强比约为100时谱线强度出现饱和现象,为利用偏振光谱进行激光器频率稳定时选择参数提供了理论依据。
Polarization spectroscopy is a high-sensitivity and high-resolution spectroscopy technique. An experimental method based on adjustable balance detection of polarized spectrum was proposed. The trend of the linear polarization of polarized light under different polarization planes was studied. The inversion of the spectral line with the rotation of the polarizer was observed. By combining the theory of polarization and equilibrium detection, the phenomenon of line inversion is explained, and the theory and experiment are in good agreement. At the same time, the dependence of the peak-to-peak value of the chromatic dispersion line on the pump light intensity is studied. It is found that the saturation of the line intensity appears when the pump-light ratio is about 100. The parameters provide the theoretical basis.