Alber, G. ; Cooper, J. ; Charlton, A. ; Meacher, D. R. ; Ewart, P. (1989)
Revised theory of resonant degenerate four-wave mixing with broad-bandwidth lasers.
In: Physical Review A, 40 (10)
doi: 10.1103/PhysRevA.40.5705
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We present a revision of the theory of finite laser bandwidth effects on degenerate four-wave mixing (DFWM) of Alber, Cooper, and Ewart (ACE) [Phys. Rev. A 31, 2344 (1985)]. The same model is used for intense, broad-bandwidth pump lasers interacting with a weak monochromatic probe in a medium composed of two-level atoms. The density-matrix equations describing the time evolution of the atomic polarization coupled to fluctuating fields are solved using an appropriate decorrelation approximation. A steady-state analytical solution is found for resonant and near-resonant DFWM, for intensities that do not saturate the medium. For more intense fields it is found to be necessary to form a more complicated set of differential equations for all products of the field and atomic density-matrix elements. The results show that as in the ACE theory, increasing the bandwidth b leads to an increased effective saturation intensity. However, we find the DFWM reflectivity scales as 1/b2 when the probe is monochromatic and not 1/b as in the ACE theory. Furthermore, the saturation behavior of nonresonant DFWM is found to differ from the predictions of ACE. Atomic motion effects are shown to yield a Doppler-broadened line shape and also to affect the saturation behavior of the signal.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 1989 |
| Autor(en): | Alber, G. ; Cooper, J. ; Charlton, A. ; Meacher, D. R. ; Ewart, P. |
| Art des Eintrags: | Bibliographie |
| Titel: | Revised theory of resonant degenerate four-wave mixing with broad-bandwidth lasers |
| Sprache: | Englisch |
| Publikationsjahr: | 1 November 1989 |
| Verlag: | APS Physics |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review A |
| Jahrgang/Volume einer Zeitschrift: | 40 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.1103/PhysRevA.40.5705 |
| URL / URN: | https://journals.aps.org/pra/abstract/10.1103/PhysRevA.40.57... |
| Kurzbeschreibung (Abstract): | We present a revision of the theory of finite laser bandwidth effects on degenerate four-wave mixing (DFWM) of Alber, Cooper, and Ewart (ACE) [Phys. Rev. A 31, 2344 (1985)]. The same model is used for intense, broad-bandwidth pump lasers interacting with a weak monochromatic probe in a medium composed of two-level atoms. The density-matrix equations describing the time evolution of the atomic polarization coupled to fluctuating fields are solved using an appropriate decorrelation approximation. A steady-state analytical solution is found for resonant and near-resonant DFWM, for intensities that do not saturate the medium. For more intense fields it is found to be necessary to form a more complicated set of differential equations for all products of the field and atomic density-matrix elements. The results show that as in the ACE theory, increasing the bandwidth b leads to an increased effective saturation intensity. However, we find the DFWM reflectivity scales as 1/b2 when the probe is monochromatic and not 1/b as in the ACE theory. Furthermore, the saturation behavior of nonresonant DFWM is found to differ from the predictions of ACE. Atomic motion effects are shown to yield a Doppler-broadened line shape and also to affect the saturation behavior of the signal. |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Angewandte Physik 05 Fachbereich Physik > Institut für Angewandte Physik > Theoretische Quantenphysik |
| Hinterlegungsdatum: | 02 Mai 2022 09:05 |
| Letzte Änderung: | 10 Mai 2022 07:30 |
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