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    • Keywords


      Nonlinearity; modulational instability; optical fibre; four-wave mixing.

    • Abstract


      A theoretical analysis of modulational instability (MI) of optical pulses propagating near the zero dispersion wavelength of a lossless fibre with the effect of delayed saturable nonlinear response is presented. We calculate the exact dispersion relation with the effect of higher dispersion for the harmonic perturbation. We analysed the impact of fourth-order dispersion effects in the MI spectrum. We examine the possibility of MI in both dispersion regimes, regardless of the sign of the group velocity dispersion.

    • Author Affiliations


      K Nithyanandan1 R Vasantha Jayakantha Raja2 T Uthayakumar1 K Porsezian1

      1. Department of Physics, Pondicherry University, Puducherry 605 014, India
      2. School of Electrical and Electronics Engineering, SASTRA University, Thanjavur 613 401, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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