The exact electric polarization operator of the Maxwell–Bloch equations for a three-level Λ-type system is derived without assuming equality of the transition dipole moments. Numerical solution of the resulting solitary wave equations yields a richer spectrum than found earlier for identical dipole moments [ Hioe and Grobe, Phys. Rev. Lett. 73, 2559 (1994) ]. The two components of the new solitary waves each have a zero-pulse area and take the form of modulated oscillations.
© 2008 Optical Society of America
Original Manuscript: April 18, 2007
Revised Manuscript: November 14, 2007
Manuscript Accepted: November 14, 2007
Published: March 31, 2008
A. S. Rosenthal and Talal Ghannam, "Optical solitary waves in three-level media: effects of different dipole moments," J. Opt. Soc. Am. B 25, 645-650 (2008)