Direct determination of the two-photon absorption cross section by the intracavity laser spectroscopy method
Direct determination of the two-photon absorption cross section by the intracavity laser spectroscopy method
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腔内激光光谱法直接测定双光子吸收截面
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
A. F. Suchkov
中科院分区：
文献类型：
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作者：
V. Baev;T. Belikova;V. F. Gamalii;E. A. Sviridenkov;A. F. Suchkov
采用腔内激光光谱法测定了钾蒸气的双光子吸收。在760 ~ 770 nm波段发射的宽带染料激光器的输出光谱中，通过吸收检测到双光子从基态42S1/2到态62S1/2和42d3 /2,5/2的跃迁；吸收发生的频率对应于较高状态的能量和红宝石激光光子的能量之差。吸收截面与场的平方之比为σ2/E2 = 1.5 × 10−33、1.3 × 10−35和2.8 × 10−36 m4/V2，与基于摄动理论的计算结果符合得很好。
The intracavity laser spectroscopy method was used to determine the two-photon absorption of potassium vapor. The two-photon transitions from the ground state 42S1/2 to the states 62S1/2 and 42D3/2,5/2 were detected from absorption in the output spectrum of a wide-band dye laser emitting in the range 760–770 nm; the absorption occurred at a frequency corresponding to the difference between the energies of the upper state and the energy of a ruby laser photon. The ratio ofthe absorption cross section to the square ofthe field was σ2/E2 = 1.5 × 10−33,1.3 × 10−35,and 2.8 × 10−36 m4/V2, in satisfactory agreement with calculations carried out on the basis of perturbation theory.