Generation of a train of ultrashort pulses using periodic waves in tapered photonic crystal fibres

S. O. Atubaa, K. Nakkeeran, K. W. Chow, P Ramesh Babu, A. Manimegalaid, K. Senthilnathan

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
9 Downloads (Pure)


We consider a light wave propagation in tapered photonic crystal fibres (PCFs) wherein the wave propagation is described by the variable coefficient nonlinear Schrödinger equation. We solve it directly by means of the theta function identities and Hirota bilinear method in order to obtain the exact periodic waves of sn, cn and dn types. These chirped period waves demand exponential variations in both dispersion and nonlinearity. Besides, we analytically demonstrate the generation of a train of ultrashort pulses using the periodic waves by exploiting the exponentially varying optical properties of the tapered PCFs. As a special case, we discuss the chirped solitary pulses under long wave limit of these periodic waves. In addition, we derive these types of periodic waves using the self-similar analysis and compare the results.
Original languageEnglish
Pages (from-to)2246-2258
Number of pages13
JournalJournal of Modern Optics
Issue number21
Early online date14 Jun 2016
Publication statusPublished - Jun 2016

Bibliographical note

This work was supported by the Ministry of Education , Nigeria
for financial support through the TETFUND scholarship 55
scheme; CSIR [grant number 03(1264)/12/EMR-II].


  • nonlinear optics
  • photonic crystal fiber
  • pulse compression


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