Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Optics Communications

Lasing without inversion: interference of radiatively broadened resonances in dressed atomic systems

Michael Fleischhauer, Christoph H. Keitel, Lorenzo M. Narducci, Marlan O. Scully, Shi-Yao Zhu, Muhammad Suhail Zubairy

Published Dec 1, 1992• 87 citations
Publisher
DOI
10.1016/0030-4018(92)90609-u

Related papers

Lasing Without Inversion Via Interference of Double-Dark Resonances in Atomic and Quantum Well Systems

Marlan O. Scully, Michael Fleischhauer, Edward S. Fry +5 more

Springer eBooks•Jan 1, 1999•3 citations

Lasers without inversion: A closed lifetime broadened system

A. Imamolu, J. E. Field, Stephen E. Harris

We show a model laser system which operates by an electromagnetically induced interference. Provided that an inversion condition for the thermal radiation field is satisfied, the system lases without atomic population inversion in steady state. The system is pumped by incoherent radiation on the transition on which lasing occurs.

Physical Review Letters•Mar 4, 1991•305 citations

Coherence-induced lasing in simple atomic systems

Yifu Zhu

Quantum Electronics and Laser Science Conference•May 22, 1995•0 citations

Theory of lasing without population inversion

Heide Doss, Lorenzo M. Narducci

This thesis is concerned with the amplification of coherent radiation from an active medium under conditions which require no population inversion between the energy levels. Gain without population inversion may be obtained by creating a sufficiently strong correlation between pairs of atomic states, usually with the help of external sources of resonant electromagnetic radiation. Our main objective is to investigate two possible selections for the active medium: a three level atom in a lambda configuration and a Raman-driven four level model. For both we identify the conditions that lead to inversionless laser action, we calculate the small signal gain and investigate the physical mechanisms which are responsible for the emergence of gain. While the ultimate cause of the gain is quantum interference, we propose attractive alternative pictures based on the dressed states of the coupled atom-driving field systems. We address the important practical issue of the effect of atomic motion and related Doppler broadening on the inversionless gain profile and we also analyze the transient response of each laser model with the help of the appropriate Maxwell-Bloch equations. Finally we develop a fully quantum mechanical description of the lambda model and find that the radiated field can display unique quantum features which manifest themselves with sub-Poissonian photon fluctuations.

•Jan 1, 1992•1 citation

Lasing without inversion III: microwave coupling induced atomic coherence

H. Fearn, Marlan O. Scully, Shi-Yao Zhu +1 more

Zeitschrift für Physik D Atoms Molecules and Clusters•Jun 1, 1992•16 citations

Role of atomic coherence in lasing without inversion

Zhenfei Luo, Zhizhan Xu

A noninversion laser system which is closed lifetime broadened and free of the restriction on atomic decay rates is proposed. For the realization of lasing without inversion, the Rabi frequency of the applied field must exceed a lower threshold. Moreover, the coherence term in dressed states must enhance the gain. These results are obtained beyond the specific approximations.

Physical Review A•Feb 1, 1993•4 citations
This thesis is concerned with the amplification of coherent radiation from an active medium under conditions which require no population inversion between the energy levels. Gain without population inversion may be obtained by creating a sufficiently strong correlation between pairs of atomic states, usually with the help of external sources of resonant electromagnetic radiation. Our main objective is to investigate two possible selections for the active medium: a three level atom in a lambda configuration and a Raman-driven four level model. For both we identify the conditions that lead to inversionless laser action, we calculate the small signal gain and investigate the physical mechanisms which are responsible for the emergence of gain. While the ultimate cause of the gain is quantum interference, we propose attractive alternative pictures based on the dressed states of the coupled atom-driving field systems. We address the important practical issue of the effect of atomic motion and related Doppler broadening on the inversionless gain profile and we also analyze the transient response of each laser model with the help of the appropriate Maxwell-Bloch equations. Finally we develop a fully quantum mechanical description of the lambda model and find that the radiated field can display unique quantum features which manifest themselves with sub-Poissonian photon fluctuations.