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Pramana

, 92:11 | Cite as

Nonlinear process-induced spectral changes in hydrogenated amorphous silicon core optical fibre

  • Shi-Han Yang
  • Min-Hui Jin
  • Jian-Wei WuEmail author
Article

Abstract

In this paper, the spectral properties of temporal double pulses centred at the same central wavelength and two different central wavelengths are numerically presented based on hydrogenated amorphous silicon core optical fibre. In order to characterise the output spectra of double pulses, the group velocity dispersion and various nonlinear processes including self-phase modulation, cross-phase modulation, two-photon absorption, free carrier absorption and free carrier dispersion are considered in the theoretical model. Numerical results show that, under fixed fibre length condition, the widths of the outcome spectra are strongly dependent on the delay times, peak powers and initial chirps of input double pulses, i.e. widths of the output spectra are proportional to the launched peak powers, and the delay times control the separation between two pulses, resulting in the spectral change within a proper delay time, and the spectral widths are compressed or extended by judiciously adjusting the initial chirps imposed on the input pulses.

Keywords

Nonlinear optics hydrogenated amorphous silicon optical fibre nonlinear processes optical spectrum 

PACS Nos

42.65.Wi 42.65.−k 42.65.Jx 

Notes

Acknowledgements

This work was supported in part by the Open Foundation of State Key Laboratory on Integrated Optoelectronics under Grant No. IOSKL2016KF02.

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Copyright information

© Indian Academy of Sciences 2018

Authors and Affiliations

  1. 1.School of Physics and Electronic EngineeringChongqing Normal UniversityChongqingPeople’s Republic of China

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