摘要
三能级∧型原子系统被非相干辐射场泵浦，在稳态情况下，系统产生无粒子数反转激光。本文分析了无反转时的增益及增益的起源。
A three-level ∧ -type atomic system is pumped by an in coherentradiation field. The system lases without population inversion in steady state. Weanalyze the inversionless gain and the origin of gain.
关键词
无反转激光
三能级Λ型原子
增益
Λ系统
Lasing without inversion, three-level ∧ -type atomic system, origin of gain
