He—Ne放电管荧光光谱增益的实验测试与研究

THE EXPERIMENT TEST AND RESEARCH OF THE FLUORESCENT SPECTRUM OF HE-NE DISCHARGE TUBE GAINING

本实验研究的目的是了解氦和氖原子的能级结构,熟悉有关激光工作能级的激发原理。通过测量氦—氖放电管中氖原子的3S2和2Pi(i=1,2,3……10;i=9除外)自发射辐射光谱的相对强度,求出各能级间的反转粒子数。利用已知的自发发生系数Aij;的数据求出各条谱线的相对增益系数。从而估计出有光谱线出现激光的可能性。氦氖荧光光谱中存在很多光谱成分,分析其中哪些的增益比较高,哪些比较低,对数条谱线进行计算、比较和分析。

The goal of this experiment is to understand the energy structure of heliumand neon atom, and make us know the excitated principle of some laser level structure.The population inversion in each level can be calculated by measuring the spectral relative intensity that the 3 S2 and 2P1 （ i = 1,2,3……10 ; except i = 9 ） energy of neon atom radiate spontaneously in He - Ne discharge tube. The relative gain coefficient among spectrums can be calculated by the data of spontaneous radiating ycoefficient - Aij Which has been know. So that we can estimate the possibility that spectnun can produce laser. Because the He - Ne fluorescence spectrum contains lots of spectrum components, it plays an importan role in calculating, measuring and analyzing spectrums by analyzing Whose gains are high and whose are low.