Propagation of Raman-resonant frequency chirped laser pulses in a medium of lambda-atoms

Nora Sandor, G. Djotyan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A quasi-transparent propagation phenomenon is presented for a pair of frequency-modulated laser pulses in an optically thick medium of cold atomic gas. The noninteracting, identical lambda-structured atoms are driven by two classical laser fields, which are frequency-chirped in the same way around the corresponding atomic transition frequencies, maintaining two-photon (Raman) resonance. It is shown by numerical analysis that after propagating over a relatively short distance (determined by the absorption length), the frequency-chirped pulse pair is affected by the atoms in such a way that instead of exciting the atoms (as it would happen in an optically dilute medium), they create a certain coherent superposition of the ground states (which can be varied by the parameters of the incoming fields), and they propagate in the remainder of the medium without significant further losses. This quasi-lossless propagation effect of the Raman-resonant frequency-chirped pulses, described above, is not only interesting in the point of view of the laser fields, but the on-demand creation of coherent superpositions among atomic states along the optically thick medium may also find applications in quantum optical experiments and quantum informatics.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8773
DOIs
Publication statusPublished - 2013
EventPhoton Counting Applications IV; and Quantum Optics and Quantum Information Transfer and Processing - Prague, Czech Republic
Duration: Apr 16 2013Apr 17 2013

Other

OtherPhoton Counting Applications IV; and Quantum Optics and Quantum Information Transfer and Processing
CountryCzech Republic
CityPrague
Period4/16/134/17/13

Fingerprint

Resonant Frequency
Raman
resonant frequencies
Laser pulses
Natural frequencies
Propagation
Laser
Atoms
propagation
pulses
Superposition
lasers
atoms
Lasers
Ground state
cold gas
Numerical analysis
monatomic gases
Photons
Gases

Keywords

  • Adiabaticity
  • Coherent control
  • Frequency-chirped pulses
  • Pulse propagation

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Sandor, N., & Djotyan, G. (2013). Propagation of Raman-resonant frequency chirped laser pulses in a medium of lambda-atoms. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8773). [87730Z] https://doi.org/10.1117/12.2017217

Propagation of Raman-resonant frequency chirped laser pulses in a medium of lambda-atoms. / Sandor, Nora; Djotyan, G.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8773 2013. 87730Z.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sandor, N & Djotyan, G 2013, Propagation of Raman-resonant frequency chirped laser pulses in a medium of lambda-atoms. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8773, 87730Z, Photon Counting Applications IV; and Quantum Optics and Quantum Information Transfer and Processing, Prague, Czech Republic, 4/16/13. https://doi.org/10.1117/12.2017217
Sandor N, Djotyan G. Propagation of Raman-resonant frequency chirped laser pulses in a medium of lambda-atoms. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8773. 2013. 87730Z https://doi.org/10.1117/12.2017217
Sandor, Nora ; Djotyan, G. / Propagation of Raman-resonant frequency chirped laser pulses in a medium of lambda-atoms. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8773 2013.
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