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

• 来源期刊: 中国物理（英文版）
• 年，卷（期）: 2000,（2）
• 所属期刊栏目: CLASSICAL AREAS OF PHENOMENOLOGY
• 页码范围: 124-130
• 页数: 7页
• 语种: 英文

摘要

Inversionless gain in a degenerate three-level system driven by a strong external field and by collisions with a buffergas 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 ofoptimal conditions are derived. The idea developed here for the incoherent pump could be generalized to other systems.