中国物理B ›› 2000, Vol. 9 ›› Issue (2): 124-130.doi: 10.1088/1009-1963/9/2/009

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INVERSIONLESS GAIN IN A THREE-LEVEL SYSTEM DRIVEN BY A STRONG FIELD AND COLLISIONS

高锦岳1, 张汉壮1, A. K. Popov2, S. A. Myslivets2, B. Wellegehausen3   

  1. (1)Department of Physics, Jilin University, Changchun 130023, China; (2)Institut for Physics, Russian Academy of Sciences and Krasnoyarsk State University, Krasnoyarsk 660036, Russia; (3)Institut für Quantenoptik, Universit?t Hannover, Welfengarten 1,30167 Hannover, Germany
  • 收稿日期:1999-03-14 出版日期:2000-02-15 发布日期:2005-06-10
  • 基金资助:
    Project supported in part by the Russian Foundation for Basic Research (Grant No. 96-00010c), by the National Natural Science Foundation of China (Grant No. 19911121500) and by the Science and Technology Foundation of Jilin Province, China (Grant No. 9805

INVERSIONLESS GAIN IN A THREE-LEVEL SYSTEM DRIVEN BY A STRONG FIELD AND COLLISIONS

A. K. Popova, S. A. Myslivetsa, Gao Jin-yue (高锦岳)b, Zhang Han-zhuang (张汉壮)b, B. Wellegehausenc   

  1. a Institut for Physics, Russian Academy of Sciences and Krasnoyarsk State University, Krasnoyarsk 660036, Russia;  b Department of Physics, Jilin University, Changchun 130023, China;  c Institut für Quantenoptik, Universit$\ddot{\rm a}$t Hannover, Welfengarten 1,30167 Hannover, Germany
  • Received:1999-03-14 Online:2000-02-15 Published:2005-06-10
  • Supported by:
    Project supported in part by the Russian Foundation for Basic Research (Grant No. 96-00010c), by the National Natural Science Foundation of China (Grant No. 19911121500) and by the Science and Technology Foundation of Jilin Province, China (Grant No. 9805

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摘要： Inversionless gain in a degenerate three-level system driven by a strong external field and by collisions with a buffer gas is investigated. The mechanism of population distribution in upper laser level, contributed by the collision transfer, as well as by relaxation, induced by pressure of a buffer gas, is discussed in detail. Explicit formulae for analysis of optimal conditions are derived. The idea developed here for the incoherent pump could be generalized to other systems.

Abstract: Inversionless gain in a degenerate three-level system driven by a strong external field and by collisions with a buffer gas is investigated. The mechanism of population distribution in upper laser level, contributed by the collision transfer, as well as by relaxation, induced by pressure of a buffer gas, is discussed in detail. Explicit formulae for analysis of optimal conditions are derived. The idea developed here for the incoherent pump could be generalized to other systems.

中图分类号:  (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)

  • 42.50.Hz
42.60.Lh (Efficiency, stability, gain, and other operational parameters)