https://doi.org/10.1140/epjd/e2009-00205-7
Slow vector optical solitons in a cold four-level inverted-Y atomic system
1
Wuhan National Laboratory for Optoelectronics and School
of Physics, Huazhong University of Science and Technology, 430074, Wuhan, P.R. China
2
Department of Physics, Southeast University, 210096, Nanjing, P.R. China
Corresponding author: a siliugang@163.com
Received:
13
November
2008
Revised:
25
May
2009
Published online:
17
July
2009
The authors show the formation of slow temporal vector optical solitons in a cold lifetime-broadened four-level inverted-Y atomic system. We demonstrate that Maxwell's equations for describing two orthogonally polarised components of a low intensity signal field can evolve into two coupled nonlinear Schrödinger equations, which results in various distortion-free temporal vector optical solitons, such as bright-bright or dark-dark vector solitons. These results are produced from the correct balance between dispersion, self- and cross-phase modulation (SPM and XPM) effects. We also show that the integrable Manakov model can be realised by adjusting the corresponding SPM, XPM and dispersion effects of this inverted-Y atomic system.
PACS: 05.45.Yv – Solitons / 42.65.Tg – Optical solitons; nonlinear guided waves / 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009
