Scientific Results

Spatiotemporal polarization dynamics in a transverse multimode CO2 laser with optical feedback

Year: 2014

Authors: Meucci R., Al Naimee K., Ciszak M., De Nicola S., Abdalah S.F., Arecchi F.T.

Autors Affiliation: Istituto Nazionale di Ottica CNR, Florence, Italy; University of Baghdad, Department of Physics, College of Science, Baghdad, Iraq; CNR SPIN Complesso Universitario di M. S. Angelo, Naples, Italy; INFN Sez Napoli, Naples, Italy; High Inst Telecommun & Post, Baghdad, Iraq; Univ Florence, I-50121 Florence, Italy

Abstract: We investigate the polarization dynamics in a quasi-isotropic CO2 laser emitting on the TEM01* mode subjected to an optical feedback. We observe a complex dynamics in which spatial mode and polarization competition are involved. The observed dynamics is well reproduced by a model that discriminates between the intrinsic asymmetry due to the kinetic coupling of molecules with different angular momenta and the anisotropy induced by the polarization feedback. We observe various dynamical regimes including chaotic dynamics and show that feedback changes these states from regular to chaotic and vice versa. Finally, the possible applications to polarization coding are discussed.

Journal/Review: EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS

Volume: 223 (8)      Pages from: 1729  to: 1742

More Information: Work was partly supported by Ente Cassa di Risparmio di Firenze. MC and RM acknowledge Regione Toscana for financial support.
DOI: 10.1140/epjst/e2014-02124-0

Citations: 2
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English