Nonlinear theory of noninversion lasers of an open three-level system

Shi Yao ZHU, De Zhong Wang, Jin Yue Gao

Research output: Contribution to journalJournal articlepeer-review

40 Citations (Scopus)


A nonlinear theory of a noninversion laser of an open three-level system based on electromagnetically induced transparency is given. In this noninversion laser model, a nonselective pumping mechanism is used for obtaining lasing gain such that the population in the lower lasing level is always larger than a half of the total population no matter whether the driving field is on or off. In the lasing region, there is no direct pumping to the upper level. The conditions for the existence of a nontrivial and stable laser field are obtained. The dependence of the laser intensity on the intensity of the driving field and the ratio of the two decay rates from the upper level has been obtained, and the ways to obtain a large laser field have been studied.

Original languageEnglish
Pages (from-to)1339-1346
Number of pages8
JournalPhysical Review A
Issue number2
Publication statusPublished - 1997

Scopus Subject Areas

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Nonlinear theory of noninversion lasers of an open three-level system'. Together they form a unique fingerprint.

Cite this