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
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
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.
Received: 14 March 1999
Accepted manuscript online:
PACS:
42.50.Hz
(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
(Efficiency, stability, gain, and other operational parameters)
Fund: 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
Cite this article:
A. K. Popov, S. A. Myslivets, Gao Jin-yue (高锦岳), Zhang Han-zhuang (张汉壮), B. Wellegehausen INVERSIONLESS GAIN IN A THREE-LEVEL SYSTEM DRIVEN BY A STRONG FIELD AND COLLISIONS 2000 Chinese Physics 9 124
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