Inversionless laser from a closed multilevel system
- 1 January 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 47 (1) , 602-609
- https://doi.org/10.1103/physreva.47.602
Abstract
We show that a closed four-level system can exhibit lasing without population inversion in any state basis. The same system can be also made to exhibit lasing without population inversion in the bare-state basis but with population inversion in the dressed-state basis. We derive the conditions of lasing without inversion and examine the dependence of the gain on various system parameters. The lasing threshold and the steady-state photon numbers are calculated. Comparison with a ssV-type, three-level model is presented.Keywords
This publication has 24 references indexed in Scilit:
- Inhibition of spontaneous emission noise in lasers without inversionPhysical Review Letters, 1991
- Lasing without inversion via the lambda quantum-beat laser in the collision-dominated regimeOptics Communications, 1990
- Radiative emission of driven two-level atoms into the modes of an enclosing optical cavity: The transition from fluorescence to lasingPhysical Review A, 1990
- Lasers without inversion: Single-atom transient responsePhysical Review A, 1989
- Interference of radiatively broadened resonancesPhysical Review A, 1989
- Degenerate quantum-beat laser: Lasing without inversion and inversion without lasingPhysical Review Letters, 1989
- Lasers without inversion: Interference of lifetime-broadened resonancesPhysical Review Letters, 1989
- Gain-feedback approach to optical instabilities in sodium vaporPhysical Review Letters, 1988
- Observation of Amplification in a Strongly Driven Two-Level Atomic System at Optical FrequenciesPhysical Review Letters, 1977
- Stimulated Emission and Absorption near Resonance for Driven SystemsPhysical Review A, 1972