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

Nonlinear Dynamics in Optical Systems

Polarization-Sensitive Population Trapping in an Optically Pumped Laser

Eugenio Roldán, Ramon A. Vilaseca, Germán J. de Valcárcel, M. Arjona, Jaume Pujol, R. Corbalán

Published Jan 1, 1992• 0 citations
Publisher

Abstract

As we have shown recently /1/, the efficiency of an optically pumped laser is strongly sensitive to the structure of the atomic (or molecular) levels involved in the amplifying process, in particular to M-degeneracy. Specifically, when the common level b shared by the pump and laser transitions in a typical three-level configuration (Fig.1) has two sublevels m=±1 and the pump and laser fields are both linearly polarized (such as in the case, for instance, of the ammonia farinfrared laser /2/), there is a large difference in the dynamics of the laser when the pump and laser field polarizations are parallel or orthogonal /1,2/.

DOI
10.1364/nldos.1992.fb6

Related papers

Permanent Electronic Excitation of a Molecular Layer on a Surface through Phase Conjugation

Henk F. Arnoldus, Thomas F. George

The dynamics of an atom (or molecule) located near the surface of a four-wave mixing phase conjugator is studied. This device consists of a slab of nonlinear material, which is illuminated by two strong counterpropagating laser beams. The atomic dipole field induces a polarization in the nonlinear material, and as a result, a phase-conjugated replica is emitted toward the atom. This effectively leads to a four-wave mixing process at the site of the atom, during which two pump photons are annihilated in favor of an electronic excitation of the atom. The mismatch in energy is emitted as a single fluorescent photon. In the steady state the atom acquires a finite population of the excited level, although there is no direct optical pumping of the atomic transition. It is shown that this population is determined entirely by the Fresnel reflection coefficients of the medium. In case of magnetic degeneracy of the levels, the distribution over the sublevels is furthermore determined by geometrical Clebsch−Gordan coefficients. Three cases of low angular momentum are worked out in detail, as examples.

The Journal of Physical Chemistry•Jan 1, 1996•0 citations

Evidence of self-polarization of the ground degenerate atomic level during optical pumping on a two-quantum transition

A. C. Izmaikov

Optics and Spectroscopy•Apr 1, 1992•0 citations

Population redistribution of atomic ground-term sublevels during optical pumping at multiphoton transitions

А. Ч. Измайлов

Optics and Spectroscopy•May 1, 1991•0 citations

New insights into the influence of light polarization on the dynamics of optically pumped lasers

R. Corbalán, Ramon A. Vilaseca, Montserrat Arjona +3 more

The dynamics of an optically pumped single mode laser with pump and laser fields with either parallel or crossed linear polarizations and a homogeneously broadened four-level medium is theoretically investigated in detail. Numerical simulations reveal dramatically different dynamic behaviors for these two polarization configurations. The analysis of the model equations allows us to find the physical origin of both behaviors. In particular, the Lorenz-type dynamics exhibited by the orthogonal configuration arises from the lack of coherent effects in spite of the optical pumping.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jul 6, 1994•0 citations

Dynamics of coherently pumped lasers with linearly polarized pump and generated fields

R. Corbalán, Ramon A. Vilaseca, M. Arjona +3 more

The influence of light polarization on the dynamics of an optically pumped single-mode laser with a homogeneously broadened four-level medium is theoretically investigated in detail. Pump and laser fields with either parallel or crossed linear polarizations are considered, as are typical in far-infrared-laser experiments. Numerical simulations reveal dramatically different dynamic behaviors for these two polarization configurations. The analysis of the model equations allows us to find the physical origin of both behaviors. In particular, the crossed-polarization configuration is shown to be effective in decoupling the pump and laser fields, thus allowing for the appearance of Lorenz-type dynamics.

Physical Review A•Aug 1, 1993•40 citations

Spectropolarimetric measurement of populations in degenerated atomic systems with metastable lower level during optical pumping in intense laser fields

A.G. Dvoryanchikov, I. A. Kartashov, A. V. Shishaev

Optics Communications•Sep 1, 2002•1 citation
As we have shown recently /1/, the efficiency of an optically pumped laser is strongly sensitive to the structure of the atomic (or molecular) levels involved in the amplifying process, in particular to M-degeneracy. Specifically, when the common level b shared by the pump and laser transitions in a typical three-level configuration (Fig.1) has two sublevels m=±1 and the pump and laser fields are both linearly polarized (such as in the case, for instance, of the ammonia farinfrared laser /2/), there is a large difference in the dynamics of the laser when the pump and laser field polarizations are parallel or orthogonal /1,2/.
The dynamics of an atom (or molecule) located near the surface of a four-wave mixing phase conjugator is studied. This device consists of a slab of nonlinear material, which is illuminated by two strong counterpropagating laser beams. The atomic dipole field induces a polarization in the nonlinear material, and as a result, a phase-conjugated replica is emitted toward the atom. This effectively leads to a four-wave mixing process at the site of the atom, during which two pump photons are annihilated in favor of an electronic excitation of the atom. The mismatch in energy is emitted as a single fluorescent photon. In the steady state the atom acquires a finite population of the excited level, although there is no direct optical pumping of the atomic transition. It is shown that this population is determined entirely by the Fresnel reflection coefficients of the medium. In case of magnetic degeneracy of the levels, the distribution over the sublevels is furthermore determined by geometrical Clebsch−Gordan coefficients. Three cases of low angular momentum are worked out in detail, as examples.
The dynamics of an optically pumped single mode laser with pump and laser fields with either parallel or crossed linear polarizations and a homogeneously broadened four-level medium is theoretically investigated in detail. Numerical simulations reveal dramatically different dynamic behaviors for these two polarization configurations. The analysis of the model equations allows us to find the physical origin of both behaviors. In particular, the Lorenz-type dynamics exhibited by the orthogonal configuration arises from the lack of coherent effects in spite of the optical pumping.
The influence of light polarization on the dynamics of an optically pumped single-mode laser with a homogeneously broadened four-level medium is theoretically investigated in detail. Pump and laser fields with either parallel or crossed linear polarizations are considered, as are typical in far-infrared-laser experiments. Numerical simulations reveal dramatically different dynamic behaviors for these two polarization configurations. The analysis of the model equations allows us to find the physical origin of both behaviors. In particular, the crossed-polarization configuration is shown to be effective in decoupling the pump and laser fields, thus allowing for the appearance of Lorenz-type dynamics.