Singular optical solitons in birefringent nano-fibers

This paper serves as a sequel to previously published results on bright, dark and singular solitons in birefringent fibers with spatio-temporal dispersion, during 2014. The second form of singular soliton solutions is retrieved in this paper for birefringent nano-fibers with Kerr and parabolic laws of nonlinearity. There are constraint conditions that evolve with the solution structure. (C) 2016 Elsevier GmbH. All rights reserved.