中国物理B ›› 2001, Vol. 10 ›› Issue (4): 300-306.doi: 10.1088/1009-1963/10/4/307

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

ABSORPTION PROPERTIES OF A DRIVEN FOUR-LEVEL DOPPLER-BROADENED SYSTEM

袁石, 吴金辉, 高锦岳   

  1. Department of Physics, Jilin University, Changchun 130023, China
  • 收稿日期:2000-07-27 出版日期:2005-07-11 发布日期:2005-07-11

ABSORPTION PROPERTIES OF A DRIVEN FOUR-LEVEL DOPPLER-BROADENED SYSTEM

Yuan Shi (袁石), Wu Jin-hui (吴金辉), Gao Jin-Yue (高锦岳)   

  1. Department of Physics, Jilin University, Changchun 130023, China
  • Received:2000-07-27 Online:2005-07-11 Published:2005-07-11

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摘要： This paper deals with the absorption spectra of a weak probe in a four-level Doppler-broadened system driven by three coherent fields. The main aim is to extend earlier studies of the spontaneous emission spectrum and to present a comprehensive survey of the spectral features of this system. In addition to a derivation of exact formulae for the spectra, we give an explanation with the help of an appropriate set of dressed atomic states. We also get a deeper insight into the physical origin of gain in view of the existence of a population inversion between the levels of the lasing transition. Finally, we explore the effect of Doppler broadening on the absorption profile of the weak probe.

Abstract: This paper deals with the absorption spectra of a weak probe in a four-level Doppler-broadened system driven by three coherent fields. The main aim is to extend earlier studies of the spontaneous emission spectrum and to present a comprehensive survey of the spectral features of this system. In addition to a derivation of exact formulae for the spectra, we give an explanation with the help of an appropriate set of dressed atomic states. We also get a deeper insight into the physical origin of gain in view of the existence of a population inversion between the levels of the lasing transition. Finally, we explore the effect of Doppler broadening on the absorption profile of the weak probe.

Key words: quantum coherence, absorption spectrum, dressed atomic states, Doppler broadening

中图分类号:  (Line shapes, widths, and shifts)

  • 32.70.Jz
32.50.+d (Fluorescence, phosphorescence (including quenching)) 42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)