Inversionless gain in a three-level system driven by a strong field and collisionsProject 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. 980526).
A K Popov; S A Myslivets; Gao Jin-yue; Zhang Han-zhuang; B Wellegehausen
Журнал:
Chinese Physics
Дата:
2000-02-01
Аннотация:
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.
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