Abstract
This paper obtains exact bright, dark and singular dispersive optical soliton solutions to DWDM system that is studied with spatio-temporal dispersion in addition to group-velocity dispersion. The governing model is Schrodinger-Hirota equation. The method of undetermined coefficients is employed to secure these soliton solutions that appear with necessary constraints for their existence. (C) 2016 Elsevier GmbH. All rights reserved.