Lasing without inversion based on magnetically assisted gain in coherently prepared cold atoms

Carvalho, J. C. de Aquino; Lima, A. D. M. de; Tabosa, J. W. R.

doi:10.1103/physreva.105.023706

Cited by 4 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, it allows the use of magnetic fields as another external control parameter, which can lead to the observation of new phenomena, as for instance, the magnetically assisted optical gain recently observed in cold cesium atoms [7]. This new gain mechanism was recently used to demonstrate laser oscillation [8] and the amplification and storage of structured light [9]. This gain mechanism can be qualitatively understood as resulting from the modification of the dark-state, created by two orthogonally polarized light beams, induced by a transverse magnetic [7], which transfer population between the Zeeman sublevels.…”

Section: Introductionmentioning

confidence: 99%

Measurement of steep dispersion associated with magnetically assisted gain in Zeeman degenerate two-level system of cold atoms

de Aquino Carvalho,

Moreira,

Tabosa

2024

J. Phys. B: At. Mol. Opt. Phys.

Self Cite

View full text Add to dashboard Cite

We report on the measurements of magnetically assisted dispersion and gain in a Zeeman degenerate two-level system associated with the closed D2 hyperfine transition Fg = 3 → Fe = 2 cold cesium atoms. We use a Mach-Zehnder interferometer to measure the dispersive properties of this system in the presence of a magnetic field, transversal to the quantization direction, when the atomic system is excited by a coupling and a probe beams with orthogonal polarizations. We have measured the spectrum of the refraction index for different magnitudes of the external magnetic field and different coupling beam intensities. A previously published theoretical model, using a simpler atomic transition Fg = 1 → Fe = 0, accounts reasonably for the experimentally observed gain and dispersive lineshapes.

show abstract

Section: Introductionmentioning

confidence: 99%

Measurement of steep dispersion associated with magnetically assisted gain in Zeeman degenerate two-level system of cold atoms

de Aquino Carvalho,

Moreira,

Tabosa

2024

J. Phys. B: At. Mol. Opt. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…As we have described previously, it corresponds to a gain without population inversion and is a result of the modification of the original dark-state by the applied magnetic field, which leads to a transfer of power from the coupling beam to the probe beam. It is worth mentioning this gain can be further enhanced using an optical cavity and we have recently employed this gain mechanism to achieve cw laser oscillation in cold cesium [19].…”

Section: Introductionmentioning

confidence: 99%

Amplification and storage of light carrying orbital angular momentum via magnetically assisted gain in cold atoms

Moreira¹,

Carvalho²,

Tabosa³

2022

J. Opt.

Self Cite

View full text Add to dashboard Cite

We report on the amplification and the storage of a light vortex beam carrying orbital angular momentum in an ensemble of cold cesium atoms in the presence of an external transverse magnetic field. This magnetically assisted optical gain was previously reported in a recent publication and originates from the manipulation of the induced dark state by the external magnetic field. Single pass optical gain exceeding $100\%$ was measured for beams with different topological charges. Furthermore, we also demonstrate the storage and retrieval of the vortex beams, showing that the amplification and the storage processes preserve the coherent nature of the optical vortex. A simple theoretical model based on density matrix numeric calculation and which accounts for the presence of the external magnetic field was developed and present qualitative agreement with the observed results. Owing to the recent proposal of using light carrying orbital angular momentum for efficient data transmission systems, we believe our results could find application in communications protocols involving distant nodes.

show abstract

Propagation of Fractional Orbital Angular Momentum in Atomic Media

曲

2024

JAPC

View full text Add to dashboard Cite

Lasing without inversion based on magnetically assisted gain in coherently prepared cold atoms

Cited by 4 publications

References 27 publications

Measurement of steep dispersion associated with magnetically assisted gain in Zeeman degenerate two-level system of cold atoms

Measurement of steep dispersion associated with magnetically assisted gain in Zeeman degenerate two-level system of cold atoms

Amplification and storage of light carrying orbital angular momentum via magnetically assisted gain in cold atoms

Propagation of Fractional Orbital Angular Momentum in Atomic Media

Contact Info

Product

Resources

About