Passive generation of the multi-wavelength parabolic pulses in tapered silicon nanowires

Chao Mei, Jinhui Yuan, Feng Li, Xian Zhou, Qiang Wu, Binbin Yan, Kuiru Wang, Keping Long, Gerald Farrell, Chongxiu Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)


In this paper, passive generation of the multi-wavelength parabolic pulses (PPs) in tapered silicon nanowires (TSNs) is numerically investigated. The coupled inhomogeneous nonlinear Schrödinger equation (INLSE) is derived in the context of TSN to model the multi-wavelength PP generation. The TSN is designed based on the well-known self-similar theory that the group-velocity dispersion is decreased while the nonlinear coefficient is unchanged along the propagative direction. While the pump wavelengths for three input pulses are specially set with equal intervals of 18, 12, and 6 nm, the time-domain profiles are aligned at the same position. Simulation results show that except for wavelength interval, the waveguide length is also a critical factor that influences the quality of generated PP. Both of them reshape the pulse profile by the means of walk-off effect which depends on the cross-phase modulation between multiple pulses. By properly optimizing the input parameters of Gaussian pulses as well as the center wavelength interval and TSN length, we prove that the generation of two- even three-wavelength PPs with high-quality is feasible.

Original languageEnglish
Article number9076614
Pages (from-to)77631-77641
Number of pages11
JournalIEEE Access
Publication statusPublished - 23 Apr 2020


  • Multi-wavelength parabolic pulses
  • self-similar theory
  • tapered silicon nanowires

ASJC Scopus subject areas

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)

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